Articles | Volume 12, issue 3
https://doi.org/10.5194/essd-12-2261-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-12-2261-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
The Iso2k database: a global compilation of paleo-δ18O and δ2H records to aid understanding of Common Era climate
Department of Earth and Planetary Sciences, Washington University,
Saint Louis, Missouri 63108, USA
Nicholas P. McKay
School of Earth and Sustainability, Northern Arizona University,
Flagstaff, Arizona 86011, USA
Olga V. Churakova (Sidorova)
Institute of Ecology and Geography, Siberian Federal University,
Krasnoyarsk, 660041, Russian Federation
Department of Forest Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, 8903, Switzerland
Laia Comas-Bru
School of Archaeology, Geography & Environmental Sciences, Russell Building, University of Reading, Whiteknights, Reading, Berkshire, RG6 6DR, United Kingdom
Emilie P. Dassié
EPOC Laboratory, University of Bordeaux, Bordeaux, 33615, France
Kristine L. DeLong
Department of Geography and Anthropology, Coastal Studies Institute, Louisiana State University, Baton Rouge, Louisiana 70803, USA
Georgina M. Falster
Department of Earth and Planetary Sciences, Washington University,
Saint Louis, Missouri 63108, USA
Matt J. Fischer
NSTLI Environment, ANSTO, Sydney, NSW 2234, Australia
Matthew D. Jones
School of Geography, University of Nottingham, Nottingham, NG7 2RD, UK
Lukas Jonkers
MARUM Center for Marine Environmental Sciences, Bremen University,
28359 Bremen, Germany
Darrell S. Kaufman
School of Earth and Sustainability, Northern Arizona University,
Flagstaff, Arizona 86011, USA
Guillaume Leduc
Aix Marseille University, CNRS, IRD, INRAE, Coll France, CEREGE,
Aix-en-Provence, 13545, France
Shreyas R. Managave
Earth and Climate Science, Indian Institute of Science Education and Research, Pune, Maharashtra, 411008, India
Belen Martrat
Department of Environmental Chemistry, Spanish Council for Scientific Research (CSIC), Institute of Environmental Assessment and Water Research (IDAEA), Barcelona, 08034, Spain
Thomas Opel
Polar Terrestrial Environmental Systems and PALICE Helmholtz Young
Investigator Group, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, 14473 Potsdam, Germany
Anais J. Orsi
L-IPSL, CEA-CNRS-UVSQ-Université Paris Saclay, Laboratoire des
Sciences du Climat et de L'Environnement, Gif-sur-Yvette, 91191, France
Judson W. Partin
Institute for Geophysics, University of Texas at Austin, Austin, Texas 78758, USA
Hussein R. Sayani
School of Earth and Atmospheric Science, Georgia Institute of
Technology, Atlanta, Georgia 30332, USA
Elizabeth K. Thomas
Department of Geology, University at Buffalo, Buffalo, New York 14260, USA
Diane M. Thompson
Department of Geosciences, University of Arizona, Tucson, Arizona
85719, USA
Jonathan J. Tyler
Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Nerilie J. Abram
Research School of Earth Sciences and Centre of Excellence for
Climate Extremes, Australian National University, Canberra, ACT 2601, Australia
Alyssa R. Atwood
Department of Earth, Ocean, and Atmospheric Sciences, Florida State University, Tallahassee, Florida 32306, USA
Olivier Cartapanis
Institute of Geological Sciences & Oeschger Centre for Climate Change Research, University of Bern, Bern, 3012, Switzerland
Jessica L. Conroy
Department of Geology, University of Illinois at Urbana-Champaign,
Urbana, Illinois 61822, USA
Mark A. Curran
Australian Antarctic Division, Kingston, TAS 7050, Australia
Sylvia G. Dee
Department of Earth, Environmental, and Planetary Sciences, Rice
University, Houston, Texas 77005, USA
Michael Deininger
Institute of Geosciences, Johannes Gutenberg University Mainz, 55128 Mainz, Germany
Dmitry V. Divine
Norwegian Polar Institute, Tromsø, 9296, Norway
Zoltán Kern
Institute for Geological and Geochemical Research, Research Centre
for Astronomy and Earth Sciences, MTA Centre for Excellence, Budapest, 1112, Hungary
Trevor J. Porter
Department of Geography, University of Toronto – Mississauga,
Mississauga, Ontario, L5L1C6, Canada
Samantha L. Stevenson
Bren School of Environmental Science & Management, University of California, Santa Barbara, Santa Barbara, California 93106, USA
Lucien von Gunten
PAGES International Project Office, Bern, 3012, Switzerland
A full list of authors appears at the end of the paper.
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EGUsphere, https://doi.org/10.5194/egusphere-2025-4121, https://doi.org/10.5194/egusphere-2025-4121, 2025
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The North Atlantic Oscillation is an important driver of year-to-year weather variability in Europe and North America, but its behavior on longer timescales is disputed. We present a new reconstruction of the NAO over the last millennium using water isotope proxy data from ice cores, speleothems, trees, and other archives. We find pronounced but irregular multidecadal to centennial variability. Better accounting for such variability in climate models is crucial to better project future climate.
Jonathan Obrist-Farner, Andreas Eckert, Peter M. J. Douglas, Liseth Perez, Alex Correa-Metrio, Bronwen L. Konecky, Thorsten Bauersachs, Susan Zimmerman, Stephanie Scheidt, Mark Brenner, Steffen Kutterolf, Jeremy Maurer, Omar Flores, Caroline M. Burberry, Anders Noren, Amy Myrbo, Matthew Lachniet, Nigel Wattrus, Derek Gibson, and the LIBRE scientific team
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In August 2022, 65 scientists from 13 countries gathered in Antigua, Guatemala, for a workshop, co-funded by the US National Science Foundation and the International Continental Scientific Drilling Program. This workshop considered the potential of establishing a continental scientific drilling program in the Lake Izabal Basin, eastern Guatemala, with the goals of establishing a borehole observatory and investigating one of the longest continental records from the northern Neotropics.
Jack A. Hutchings and Bronwen L. Konecky
Atmos. Meas. Tech., 16, 1663–1682, https://doi.org/10.5194/amt-16-1663-2023, https://doi.org/10.5194/amt-16-1663-2023, 2023
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The coupled variation of the three stable isotopes of oxygen in water is being studied as a relatively new tracer of the water cycle. Measurement by laser spectroscopy has a number of pitfalls that have hampered a wider exploration of this new tracer. We demonstrate successful analysis using Picarro's L2140-i analyzer and provide recommendations for other users. We find that removal of dissolved organic carbon is required when measurements are studied near the limits of instrumental accuracy.
Andrew A. Flaim, Bronwen L. Konecky, and Sloan Coats
EGUsphere, https://doi.org/10.5194/egusphere-2025-4121, https://doi.org/10.5194/egusphere-2025-4121, 2025
This preprint is open for discussion and under review for Climate of the Past (CP).
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The North Atlantic Oscillation is an important driver of year-to-year weather variability in Europe and North America, but its behavior on longer timescales is disputed. We present a new reconstruction of the NAO over the last millennium using water isotope proxy data from ice cores, speleothems, trees, and other archives. We find pronounced but irregular multidecadal to centennial variability. Better accounting for such variability in climate models is crucial to better project future climate.
Alyssa R. Atwood, Andrea L. Moore, Kristine L. DeLong, Sylvia E. Long, Sara C. Sanchez, Jessica A. Hargreaves, Chandler A. Morris, Raquel E. Pauly, Emilie P. Dassie, Thomas Felis, Antje H. L. Voelker, Sujata A. Murty, and Kim M. Cobb
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2025-467, https://doi.org/10.5194/essd-2025-467, 2025
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The stable isotopic composition of seawater is a valuable tool for studying the global water cycle in the past, present, and future. However, an active repository dedicated to archiving this type of data has been lacking, and many datasets remain hidden from public view. We have created a new database of observational seawater isotope data that is rich in metadata, publicly accessible, and machine readable to increase its availability and usability for a variety of Earth Science applications.
Kurt R. Lindberg, Elizabeth K. Thomas, Martha K. Raynolds, Helga Bültmann, and Jonathan H. Raberg
EGUsphere, https://doi.org/10.5194/egusphere-2025-3849, https://doi.org/10.5194/egusphere-2025-3849, 2025
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Plant waxes are an important tool for inferring past changes in vegetation and the water cycle. However, the mechanisms governing the production of plant waxes and their stable isotopes are not well understood in Arctic plants. We found that terrestrial Arctic plant waxes are not significantly influenced by environmental parameters including temperature, precipitation, humidity, and elevation. These findings agree with our understanding of plant wax production in other regions of the world.
Sudip Acharya, Allison A. Cluett, Amy L. Grogan, Jason P. Briner, Isla S. Castañeda, and Elizabeth K. Thomas
EGUsphere, https://doi.org/10.5194/egusphere-2025-3113, https://doi.org/10.5194/egusphere-2025-3113, 2025
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The study analyzed temperature-sensitive bacterial membrane lipids in Holocene Lake sediments from southwestern Greenland. Temperature maxima in five lakes occurred between 7000–5000 years ago, at a coastal site between 5000–3000 years ago, and at an inland site, far from the coast and the Greenland Ice Sheet, between 9000–7000 years ago. Local temperature variations, influenced by the ice sheet and ocean, likely caused discrepancies in the temperature time series.
Georgina Falster, Gab Abramowitz, Sanaa Hobeichi, Cath Hughes, Pauline Treble, Nerilie J. Abram, Michael I. Bird, Alexandre Cauquoin, Bronwyn Dixon, Russell Drysdale, Chenhui Jin, Niels Munksgaard, Bernadette Proemse, Jonathan J. Tyler, Martin Werner, and Carol Tadros
EGUsphere, https://doi.org/10.5194/egusphere-2025-2458, https://doi.org/10.5194/egusphere-2025-2458, 2025
This preprint is open for discussion and under review for Hydrology and Earth System Sciences (HESS).
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We used a random forest approach to produce estimates of monthly precipitation stable isotope variability from 1962–2023, at high resolution across the entire Australian continent. Comprehensive skill and sensitivity testing shows that our random forest models skilfully predict precipitation isotope values in places and times that observations are not available. We make all outputs publicly available, facilitating use in fields from ecology and hydrology to archaeology and forensic science.
Lutz Schirrmeister, Margret C. Fuchs, Thomas Opel, Andrei Andreev, Frank Kienast, Andrea Schneider, Larisa Nazarova, Larisa Frolova, Svetlana Kuzmina, Tatiana Kuznetsova, Vladimir Tumskoy, Heidrun Matthes, Gerrit Lohmann, Guido Grosse, Viktor Kunitsky, Hanno Meyer, Heike H. Zimmermann, Ulrike Herzschuh, Thomas Böhmer, Stuart Umbo, Sevi Modestou, Sebastian F. M. Breitenbach, Anfisa Pismeniuk, Georg Schwamborn, Stephanie Kusch, and Sebastian Wetterich
Clim. Past, 21, 1143–1184, https://doi.org/10.5194/cp-21-1143-2025, https://doi.org/10.5194/cp-21-1143-2025, 2025
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Geochronological, cryolithological, paleoecological, and modeling data reconstruct the Last Interglacial (LIG) climate around the New Siberian Islands and reveal significantly warmer conditions compared to today. The critical challenges in predicting future ecosystem responses lie in the fact that the land–ocean distribution during the LIG was markedly different from today, affecting the degree of continentality, which played a major role in modulating climate and ecosystem dynamics.
Lukas Jonkers, Tonke Strack, Montserrat Alonso-Garcia, Simon D'haenens, Robert Huber, Michal Kucera, Iván Hernández-Almeida, Chloe L. C. Jones, Brett Metcalfe, Rajeev Saraswat, Lóránd Silye, Sanjay K. Verma, Muhamad Naim Abd Malek, Gerald Auer, Cátia F. Barbosa, Maria A. Barcena, Karl-Heinz Baumann, Flavia Boscolo-Galazzo, Joeven Austine S. Calvelo, Lucilla Capotondi, Martina Caratelli, Jorge Cardich, Humberto Carvajal-Chitty, Markéta Chroustová, Helen K. Coxall, Renata M. de Mello, Anne de Vernal, Paula Diz, Kirsty M. Edgar, Helena L. Filipsson, Ángela Fraguas, Heather L. Furlong, Giacomo Galli, Natalia L. García Chapori, Robyn Granger, Jeroen Groeneveld, Adil Imam, Rebecca Jackson, David Lazarus, Julie Meilland, Marína Molčan Matejová, Raphael Morard, Caterina Morigi, Sven N. Nielsen, Diana Ochoa, Maria Rose Petrizzo, Andrés S. Rigual-Hernández, Marina C. Rillo, Matthew L. Staitis, Gamze Tanık, Raúl Tapia, Nishant Vats, Bridget S. Wade, and Anna E. Weinmann
J. Micropalaeontol., 44, 145–168, https://doi.org/10.5194/jm-44-145-2025, https://doi.org/10.5194/jm-44-145-2025, 2025
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Our study provides guidelines improving the reuse of marine microfossil assemblage data, which are valuable for understanding past ecosystems and environmental change. Based on a survey of 113 researchers, we identified key data attributes required for effective reuse. Analysis of a selection of datasets available online reveals a gap between the attributes scientists consider essential and the data currently available, highlighting the need for clearer data documentation and sharing practices.
Alice R. Paine, Joost Frieling, Timothy M. Shanahan, Tamsin A. Mather, Nicholas McKay, Stuart A. Robinson, David M. Pyle, Isabel M. Fendley, Ruth Kiely, and William D. Gosling
Clim. Past, 21, 817–839, https://doi.org/10.5194/cp-21-817-2025, https://doi.org/10.5194/cp-21-817-2025, 2025
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Few tropical mercury (Hg) records extend beyond ~ 12 ka, meaning our current understanding of Hg behaviour may not fully account for the impact of long-term hydroclimate changes on the Hg cycle in these environments. Here, we present an ~ 96 kyr Hg record from Lake Bosumtwi, Ghana. A coupled response is observed between Hg flux and shifts in sediment composition reflective of changes in lake level, suggesting that hydroclimate may be a key driver of tropical Hg cycling over millennial timescales.
Cécile Davrinche, Anaïs Orsi, Charles Amory, Christoph Kittel, and Cécile Agosta
EGUsphere, https://doi.org/10.5194/egusphere-2025-1419, https://doi.org/10.5194/egusphere-2025-1419, 2025
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We analyse 4 projections of winter surface winds in Antarctica. On the continent, projected changes in wind speed by 2100 reveal opposing trends depending on the area and model. Nevertheless, models agree on a strengthening of surface winds in Adélie Land for example and a weakening in some coastal areas. Lastly, we attribute strengthening of near-surface winds to changes in the large-sale atmospheric circulation and weakening of near-surface to changes in the structure of the lower atmosphere.
Andrew D. King, Nerilie J. Abram, Eduardo Alastrué de Asenjo, and Tilo Ziehn
EGUsphere, https://doi.org/10.5194/egusphere-2025-903, https://doi.org/10.5194/egusphere-2025-903, 2025
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It is vital that climate changes under net zero emissions are well understood to support decision making processes. Current modelling efforts are insufficient, partly due to limited simulation lengths. We propose a framework for 1000-year-long simulations that attempts to minimise computing resources by leveraging existing simulations. This will ultimately increase understanding of the implications of current climate policies for the Earth System over coming decades and centuries.
Jean-Philippe Baudouin, Nils Weitzel, Maximilian May, Lukas Jonkers, Andrew M. Dolman, and Kira Rehfeld
Clim. Past, 21, 381–403, https://doi.org/10.5194/cp-21-381-2025, https://doi.org/10.5194/cp-21-381-2025, 2025
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Earth's past temperature reconstructions are critical for understanding climate change. We test the ability of these reconstructions using climate simulations. Uncertainties, mainly from past temperature measurement methods and age determination, impact reconstructions over time. While more data enhance accuracy for long-term trends, high-quality data are more important for short-term precision. Our study lays the groundwork for better reconstructions and suggests avenues for improvement.
Christopher L. Hancock, Michael P. Erb, Nicholas P. McKay, Sylvia G. Dee, and Ruza F. Ivanovic
Clim. Past, 20, 2663–2684, https://doi.org/10.5194/cp-20-2663-2024, https://doi.org/10.5194/cp-20-2663-2024, 2024
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We reconstruct global hydroclimate anomalies for the past 21 000 years using a data assimilation methodology blending observations recorded in lake sediments with the climate dynamics simulated by climate models. The reconstruction resolves data–model disagreement in east Africa and North America, and we find that changing global temperatures and associated circulation patterns, as well as orbital forcing, are the dominant controls on global precipitation over this interval.
Andrea L. Moore, Alyssa R. Atwood, and Raquel E. Pauly
EGUsphere, https://doi.org/10.5194/egusphere-2024-3483, https://doi.org/10.5194/egusphere-2024-3483, 2024
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Around 8200 years ago, Earth experienced an abrupt climate event when melting glaciers disrupted Atlantic Ocean circulation, triggering rapid global changes. Using statistical methods that account for dating uncertainties in ancient climate records, we find tropical rainfall patterns shifted dramatically for 150 years. The regional complexity of these changes, verified by model simulations, provides insights for understanding how similar ocean changes could impact rainfall in our warming world.
Darrell Kaufman and Valérie Masson-Delmotte
Clim. Past, 20, 2587–2594, https://doi.org/10.5194/cp-20-2587-2024, https://doi.org/10.5194/cp-20-2587-2024, 2024
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Rather than reverting to a dedicated paleoclimate chapter, knowledge about pre-industrial climate should be further integrated with other lines of evidence throughout the next assessment reports by the Intergovernmental Panel on Climate Change.
Ariella K. Arzey, Helen V. McGregor, Tara R. Clark, Jody M. Webster, Stephen E. Lewis, Jennie Mallela, Nicholas P. McKay, Hugo W. Fahey, Supriyo Chakraborty, Tries B. Razak, and Matt J. Fischer
Earth Syst. Sci. Data, 16, 4869–4930, https://doi.org/10.5194/essd-16-4869-2024, https://doi.org/10.5194/essd-16-4869-2024, 2024
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Coral skeletal records from the Great Barrier Reef (GBR) provide vital data on climate and environmental change. Presented here is the Great Barrier Reef Coral Skeletal Records Database, an extensive compilation of GBR coral records. The database includes key metadata, primary data, and access instructions, and it enhances research on past, present, and future climate and environmental variability of the GBR. The database will assist with contextualising present-day threats to reefs globally.
Ida Birgitte Lundtorp Olsen, Henriette Skourup, Heidi Sallila, Stefan Hendricks, Renée Mie Fredensborg Hansen, Stefan Kern, Stephan Paul, Marion Bocquet, Sara Fleury, Dmitry Divine, and Eero Rinne
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2024-234, https://doi.org/10.5194/essd-2024-234, 2024
Revised manuscript under review for ESSD
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Discover the latest advancements in sea ice research with our comprehensive Climate Change Initiative (CCI) sea ice thickness (SIT) Round Robin Data Package (RRDP). This pioneering collection contains reference measurements from 1960 to 2022 from airborne sensors, buoys, visual observations and sonar and covers the polar regions from 1993 to 2021, providing crucial reference measurements for validating satellite-derived sea ice thickness.
Marco M. Lehmann, Josie Geris, Ilja van Meerveld, Daniele Penna, Youri Rothfuss, Matteo Verdone, Pertti Ala-Aho, Matyas Arvai, Alise Babre, Philippe Balandier, Fabian Bernhard, Lukrecija Butorac, Simon Damien Carrière, Natalie C. Ceperley, Zuosinan Chen, Alicia Correa, Haoyu Diao, David Dubbert, Maren Dubbert, Fabio Ercoli, Marius G. Floriancic, Teresa E. Gimeno, Damien Gounelle, Frank Hagedorn, Christophe Hissler, Frédéric Huneau, Alberto Iraheta, Tamara Jakovljević, Nerantzis Kazakis, Zoltan Kern, Karl Knaebel, Johannes Kobler, Jiří Kocum, Charlotte Koeber, Gerbrand Koren, Angelika Kübert, Dawid Kupka, Samuel Le Gall, Aleksi Lehtonen, Thomas Leydier, Philippe Malagoli, Francesca Sofia Manca di Villahermosa, Chiara Marchina, Núria Martínez-Carreras, Nicolas Martin-StPaul, Hannu Marttila, Aline Meyer Oliveira, Gaël Monvoisin, Natalie Orlowski, Kadi Palmik-Das, Aurel Persoiu, Andrei Popa, Egor Prikaziuk, Cécile Quantin, Katja T. Rinne-Garmston, Clara Rohde, Martin Sanda, Matthias Saurer, Daniel Schulz, Michael Paul Stockinger, Christine Stumpp, Jean-Stéphane Venisse, Lukas Vlcek, Stylianos Voudouris, Björn Weeser, Mark E. Wilkinson, Giulia Zuecco, and Katrin Meusburger
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2024-409, https://doi.org/10.5194/essd-2024-409, 2024
Revised manuscript under review for ESSD
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This study describes a unique large-scale isotope dataset to study water dynamics in European forests. Researchers collected data from 40 beech and spruce forest sites in spring and summer 2023, using a standardized method to ensure consistency. The results show that water sources for trees change between seasons and vary by tree species. This large dataset offers valuable information for understanding plant water use, improving ecohydrological models, and mapping water cycles across Europe.
Julien Westhoff, Johannes Freitag, Anaïs Orsi, Patricia Martinerie, Ilka Weikusat, Michael Dyonisius, Xavier Faïn, Kevin Fourteau, and Thomas Blunier
The Cryosphere, 18, 4379–4397, https://doi.org/10.5194/tc-18-4379-2024, https://doi.org/10.5194/tc-18-4379-2024, 2024
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We study the EastGRIP area, Greenland, in detail with traditional and novel techniques. Due to the compaction of the ice, at a certain depth, atmospheric gases can no longer exchange, and the atmosphere is trapped in air bubbles in the ice. We find this depth by pumping air from a borehole, modeling, and using a new technique based on the optical appearance of the ice. Our results suggest that the close-off depth lies at around 58–61 m depth and more precisely at 58.3 m depth.
Yi Zhou, Xianwei Wang, Ruibo Lei, Arttu Jutila, Donald K. Perovich, Luisa von Albedyll, Dmitry V. Divine, Yu Zhang, and Christian Haas
EGUsphere, https://doi.org/10.5194/egusphere-2024-2821, https://doi.org/10.5194/egusphere-2024-2821, 2024
Preprint archived
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This study examines how the bulk density of Arctic sea ice varies seasonally, a factor often overlooked in satellite measurements of sea ice thickness. From October to April, we found significant seasonal variations in sea ice bulk density at different spatial scales using direct observations as well as airborne and satellite data. New models were then developed to indirectly predict sea ice bulk density. This advance can improve our ability to monitor changes in Arctic sea ice.
Matt J. Fischer
Geosci. Model Dev., 17, 6745–6760, https://doi.org/10.5194/gmd-17-6745-2024, https://doi.org/10.5194/gmd-17-6745-2024, 2024
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In paleoclimate research, proxy system models (PSMs) model chemical or biological systems which receive environmental input and output (e.g., geochemical signals). The environmental inputs are rarely noiseless, which causes problems when calibrating multi-input PSMs. Here a PSM is developed which includes generalized noise in both model inputs and outputs and prior information. A quasi-Bayesian method enhances the stability of the solution of the Measurement Error Proxy System Model.
Paul R. Bierman, Andrew J. Christ, Catherine M. Collins, Halley M. Mastro, Juliana Souza, Pierre-Henri Blard, Stefanie Brachfeld, Zoe R. Courville, Tammy M. Rittenour, Elizabeth K. Thomas, Jean-Louis Tison, and François Fripiat
The Cryosphere, 18, 4029–4052, https://doi.org/10.5194/tc-18-4029-2024, https://doi.org/10.5194/tc-18-4029-2024, 2024
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In 1966, the U.S. Army drilled through the Greenland Ice Sheet at Camp Century, Greenland; they recovered 3.44 m of frozen material. Here, we decipher the material’s history. Water, flowing during a warm interglacial when the ice sheet melted from northwest Greenland, deposited the upper material which contains fossil plant and insect parts. The lower material, separated by more than a meter of ice with some sediment, is till, deposited by the ice sheet during a prior cold period.
Romilly Harris Stuart, Amaëlle Landais, Laurent Arnaud, Christo Buizert, Emilie Capron, Marie Dumont, Quentin Libois, Robert Mulvaney, Anaïs Orsi, Ghislain Picard, Frédéric Prié, Jeffrey Severinghaus, Barbara Stenni, and Patricia Martinerie
The Cryosphere, 18, 3741–3763, https://doi.org/10.5194/tc-18-3741-2024, https://doi.org/10.5194/tc-18-3741-2024, 2024
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Ice core δO2/N2 records are useful dating tools due to their local insolation pacing. A precise understanding of the physical mechanism driving this relationship, however, remain ambiguous. By compiling data from 15 polar sites, we find a strong dependence of mean δO2/N2 on accumulation rate and temperature in addition to the well-documented insolation dependence. Snowpack modelling is used to investigate which physical properties drive the mechanistic dependence on these local parameters.
Laura J. Larocca, James M. Lea, Michael P. Erb, Nicholas P. McKay, Megan Phillips, Kara A. Lamantia, and Darrell S. Kaufman
The Cryosphere, 18, 3591–3611, https://doi.org/10.5194/tc-18-3591-2024, https://doi.org/10.5194/tc-18-3591-2024, 2024
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Here we present summer snowline altitude (SLA) time series for 269 Arctic glaciers. Between 1984 and 2022, SLAs rose ∼ 150 m, equating to a ∼ 127 m shift per 1 °C of summer warming. SLA is most strongly correlated with annual temperature variables, highlighting their dual effect on ablation and accumulation processes. We show that SLAs are rising fastest on low-elevation glaciers and that > 50 % of the studied glaciers could have SLAs that exceed the maximum ice elevation by 2100.
Stuart Umbo, Franziska Lechleitner, Thomas Opel, Sevasti Modestou, Tobias Braun, Anton Vaks, Gideon Henderson, Pete Scott, Alexander Osintzev, Alexandr Kononov, Irina Adrian, Yuri Dublyansky, Alena Giesche, and Sebastian Breitenbach
EGUsphere, https://doi.org/10.5194/egusphere-2024-1691, https://doi.org/10.5194/egusphere-2024-1691, 2024
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We use cave rocks to reconstruct northern Siberian climate 8.68 ± 0.09 million years ago. We show that when global average temperature was about 4.5 °C warmer than today (similar to what’s expected in the coming decades should carbon emissions continue unabated), Arctic temperature increased by more than 18 °C. Similar levels of Arctic warming in the future would see huge areas of permafrost (permanently frozen ground) thaw and release greenhouse gases to the atmosphere.
Michelle O'Donnell, Kelsey Murphy, James Doss-Gollin, Sylvia Dee, and Samuel Munoz
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2024-153, https://doi.org/10.5194/hess-2024-153, 2024
Revised manuscript accepted for HESS
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We investigate the skill of CESM1 in simulating hydrologic processes over the Mississippi River basin. Model simulated discharge is seasonally delayed relative to observations: model biases are diagnosed using hydroclimate variables from reanalysis data and attributed primarily to precipitation and runoff related processes. We also show that the seasonality of simulated runoff in several CMIP6 models is improved relative to CESM1.
Laura Velasquez-Jimenez and Nerilie J. Abram
Clim. Past, 20, 1125–1139, https://doi.org/10.5194/cp-20-1125-2024, https://doi.org/10.5194/cp-20-1125-2024, 2024
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The Southern Annular Mode (SAM) influences climate in the Southern Hemisphere. We investigate the effects of calculation method and data used to calculate the SAM index and how it influences the relationship between the SAM and climate. We propose a method to calculate a natural SAM index that facilitates consistency between studies, including when using different data resolutions, avoiding distortion of SAM impacts and allowing for more reliable results of past and future SAM trends.
Cécile Davrinche, Anaïs Orsi, Cécile Agosta, Charles Amory, and Christoph Kittel
The Cryosphere, 18, 2239–2256, https://doi.org/10.5194/tc-18-2239-2024, https://doi.org/10.5194/tc-18-2239-2024, 2024
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Coastal surface winds in Antarctica are amongst the strongest winds on Earth. They are either driven by the cooling of the surface air mass by the ice sheet (katabatic) or by large-scale pressure systems. Here we compute the relative contribution of these drivers. We find that seasonal variations in the wind speed come from the katabatic acceleration, but, at a 3-hourly timescale, none of the large-scale or katabatic accelerations can be considered as the main driver.
Nikita Kaushal, Franziska A. Lechleitner, Micah Wilhelm, Khalil Azennoud, Janica C. Bühler, Kerstin Braun, Yassine Ait Brahim, Andy Baker, Yuval Burstyn, Laia Comas-Bru, Jens Fohlmeister, Yonaton Goldsmith, Sandy P. Harrison, István G. Hatvani, Kira Rehfeld, Magdalena Ritzau, Vanessa Skiba, Heather M. Stoll, József G. Szűcs, Péter Tanos, Pauline C. Treble, Vitor Azevedo, Jonathan L. Baker, Andrea Borsato, Sakonvan Chawchai, Andrea Columbu, Laura Endres, Jun Hu, Zoltán Kern, Alena Kimbrough, Koray Koç, Monika Markowska, Belen Martrat, Syed Masood Ahmad, Carole Nehme, Valdir Felipe Novello, Carlos Pérez-Mejías, Jiaoyang Ruan, Natasha Sekhon, Nitesh Sinha, Carol V. Tadros, Benjamin H. Tiger, Sophie Warken, Annabel Wolf, Haiwei Zhang, and SISAL Working Group members
Earth Syst. Sci. Data, 16, 1933–1963, https://doi.org/10.5194/essd-16-1933-2024, https://doi.org/10.5194/essd-16-1933-2024, 2024
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Speleothems are a popular, multi-proxy climate archive that provide regional to global insights into past hydroclimate trends with precise chronologies. We present an update to the SISAL (Speleothem Isotopes
Synthesis and AnaLysis) database, SISALv3, which, for the first time, contains speleothem trace element records, in addition to an update to the stable isotope records available in previous versions of the database, cumulatively providing data from 365 globally distributed sites.
Synthesis and AnaLysis) database, SISALv3, which, for the first time, contains speleothem trace element records, in addition to an update to the stable isotope records available in previous versions of the database, cumulatively providing data from 365 globally distributed sites.
Tessa R. Vance, Nerilie J. Abram, Alison S. Criscitiello, Camilla K. Crockart, Aylin DeCampo, Vincent Favier, Vasileios Gkinis, Margaret Harlan, Sarah L. Jackson, Helle A. Kjær, Chelsea A. Long, Meredith K. Nation, Christopher T. Plummer, Delia Segato, Andrea Spolaor, and Paul T. Vallelonga
Clim. Past, 20, 969–990, https://doi.org/10.5194/cp-20-969-2024, https://doi.org/10.5194/cp-20-969-2024, 2024
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This study presents the chronologies from the new Mount Brown South ice cores from East Antarctica, which were developed by counting annual layers in the ice core data and aligning these to volcanic sulfate signatures. The uncertainty in the dating is quantified, and we discuss initial results from seasonal cycle analysis and mean annual concentrations. The chronologies will underpin the development of new proxy records for East Antarctica spanning the past millennium.
Nils Weitzel, Heather Andres, Jean-Philippe Baudouin, Marie-Luise Kapsch, Uwe Mikolajewicz, Lukas Jonkers, Oliver Bothe, Elisa Ziegler, Thomas Kleinen, André Paul, and Kira Rehfeld
Clim. Past, 20, 865–890, https://doi.org/10.5194/cp-20-865-2024, https://doi.org/10.5194/cp-20-865-2024, 2024
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The ability of climate models to faithfully reproduce past warming episodes is a valuable test considering potentially large future warming. We develop a new method to compare simulations of the last deglaciation with temperature reconstructions. We find that reconstructions differ more between regions than simulations, potentially due to deficiencies in the simulation design, models, or reconstructions. Our work is a promising step towards benchmarking simulations of past climate transitions.
Georgina M. Falster, Nicky M. Wright, Nerilie J. Abram, Anna M. Ukkola, and Benjamin J. Henley
Hydrol. Earth Syst. Sci., 28, 1383–1401, https://doi.org/10.5194/hess-28-1383-2024, https://doi.org/10.5194/hess-28-1383-2024, 2024
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Multi-year droughts have severe environmental and economic impacts, but the instrumental record is too short to characterise multi-year drought variability. We assessed the nature of Australian multi-year droughts using simulations of the past millennium from 11 climate models. We show that multi-decadal
megadroughtsare a natural feature of the Australian hydroclimate. Human-caused climate change is also driving a tendency towards longer droughts in eastern and southwestern Australia.
Andrea Spolaor, Federico Scoto, Catherine Larose, Elena Barbaro, Francois Burgay, Mats P. Bjorkman, David Cappelletti, Federico Dallo, Fabrizio de Blasi, Dmitry Divine, Giuliano Dreossi, Jacopo Gabrieli, Elisabeth Isaksson, Jack Kohler, Tonu Martma, Louise S. Schmidt, Thomas V. Schuler, Barbara Stenni, Clara Turetta, Bartłomiej Luks, Mathieu Casado, and Jean-Charles Gallet
The Cryosphere, 18, 307–320, https://doi.org/10.5194/tc-18-307-2024, https://doi.org/10.5194/tc-18-307-2024, 2024
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We evaluate the impact of the increased snowmelt on the preservation of the oxygen isotope (δ18O) signal in firn records recovered from the top of the Holtedahlfonna ice field located in the Svalbard archipelago. Thanks to a multidisciplinary approach we demonstrate a progressive deterioration of the isotope signal in the firn core. We link the degradation of the δ18O signal to the increased occurrence and intensity of melt events associated with the rapid warming occurring in the archipelago.
Emma Nilsson, Carmen Paulina Vega, Dmitry Divine, Anja Eichler, Tonu Martma, Robert Mulvaney, Elisabeth Schlosser, Margit Schwikowski, and Elisabeth Isaksson
EGUsphere, https://doi.org/10.5194/egusphere-2023-3156, https://doi.org/10.5194/egusphere-2023-3156, 2024
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To project future climate change it is necessary to understand paleoclimate including past sea ice conditions. We have investigated methane sulphonic acid (MSA) in Antarctic firn and ice cores to reconstruct sea ice extent (SIE) and found that the MSA – SIE as well as the MSA – phytoplankton biomass relationship varies across the different firn and ice cores. These inconsistencies in correlations across records suggest that MSA in Fimbul Ice Shelf cores does not reliably indicate regional SIE.
Aymeric P. M. Servettaz, Cécile Agosta, Christoph Kittel, and Anaïs J. Orsi
The Cryosphere, 17, 5373–5389, https://doi.org/10.5194/tc-17-5373-2023, https://doi.org/10.5194/tc-17-5373-2023, 2023
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It has been previously observed in polar regions that the atmospheric temperature is warmer during precipitation events. Here, we use a regional atmospheric model to quantify the temperature changes associated with snowfall events across Antarctica. We show that more intense snowfall is statistically associated with a warmer temperature anomaly compared to the seasonal average, with the largest anomalies seen in winter. This bias may affect water isotopes in ice cores deposited during snowfall.
Lingwei Zhang, Tessa R. Vance, Alexander D. Fraser, Lenneke M. Jong, Sarah S. Thompson, Alison S. Criscitiello, and Nerilie J. Abram
The Cryosphere, 17, 5155–5173, https://doi.org/10.5194/tc-17-5155-2023, https://doi.org/10.5194/tc-17-5155-2023, 2023
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Physical features in ice cores provide unique records of past variability. We identified 1–2 mm ice layers without bubbles in surface ice cores from Law Dome, East Antarctica, occurring on average five times per year. The origin of these bubble-free layers is unknown. In this study, we investigate whether they have the potential to record past atmospheric processes and circulation. We find that the bubble-free layers are linked to accumulation hiatus events and meridional moisture transport.
Xavier Faïn, David M. Etheridge, Kévin Fourteau, Patricia Martinerie, Cathy M. Trudinger, Rachael H. Rhodes, Nathan J. Chellman, Ray L. Langenfelds, Joseph R. McConnell, Mark A. J. Curran, Edward J. Brook, Thomas Blunier, Grégory Teste, Roberto Grilli, Anthony Lemoine, William T. Sturges, Boris Vannière, Johannes Freitag, and Jérôme Chappellaz
Clim. Past, 19, 2287–2311, https://doi.org/10.5194/cp-19-2287-2023, https://doi.org/10.5194/cp-19-2287-2023, 2023
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We report on a 3000-year record of carbon monoxide (CO) levels in the Southern Hemisphere's high latitudes by combining ice core and firn air measurements with modern direct atmospheric samples. Antarctica [CO] remained stable (–835 to 1500 CE), decreased during the Little Ice Age, and peaked around 1985 CE. Such evolution reflects stable biomass burning CO emissions before industrialization, followed by growth from CO anthropogenic sources, which decline after 1985 due to improved combustion.
Brandon L. Graham, Jason P. Briner, Nicolás E. Young, Allie Balter-Kennedy, Michele Koppes, Joerg M. Schaefer, Kristin Poinar, and Elizabeth K. Thomas
The Cryosphere, 17, 4535–4547, https://doi.org/10.5194/tc-17-4535-2023, https://doi.org/10.5194/tc-17-4535-2023, 2023
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Glacial erosion is a fundamental process operating on Earth's surface. Two processes of glacial erosion, abrasion and plucking, are poorly understood. We reconstructed rates of abrasion and quarrying in Greenland. We derive a total glacial erosion rate of 0.26 ± 0.16 mm per year. We also learned that erosion via these two processes is about equal. Because the site is similar to many other areas covered by continental ice sheets, these results may be applied to many places on Earth.
Jonathan Obrist-Farner, Andreas Eckert, Peter M. J. Douglas, Liseth Perez, Alex Correa-Metrio, Bronwen L. Konecky, Thorsten Bauersachs, Susan Zimmerman, Stephanie Scheidt, Mark Brenner, Steffen Kutterolf, Jeremy Maurer, Omar Flores, Caroline M. Burberry, Anders Noren, Amy Myrbo, Matthew Lachniet, Nigel Wattrus, Derek Gibson, and the LIBRE scientific team
Sci. Dril., 32, 85–100, https://doi.org/10.5194/sd-32-85-2023, https://doi.org/10.5194/sd-32-85-2023, 2023
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In August 2022, 65 scientists from 13 countries gathered in Antigua, Guatemala, for a workshop, co-funded by the US National Science Foundation and the International Continental Scientific Drilling Program. This workshop considered the potential of establishing a continental scientific drilling program in the Lake Izabal Basin, eastern Guatemala, with the goals of establishing a borehole observatory and investigating one of the longest continental records from the northern Neotropics.
Xiaoxu Shi, Alexandre Cauquoin, Gerrit Lohmann, Lukas Jonkers, Qiang Wang, Hu Yang, Yuchen Sun, and Martin Werner
Geosci. Model Dev., 16, 5153–5178, https://doi.org/10.5194/gmd-16-5153-2023, https://doi.org/10.5194/gmd-16-5153-2023, 2023
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We developed a new climate model with isotopic capabilities and simulated the pre-industrial and mid-Holocene periods. Despite certain regional model biases, the modeled isotope composition is in good agreement with observations and reconstructions. Based on our analyses, the observed isotope–temperature relationship in polar regions may have a summertime bias. Using daily model outputs, we developed a novel isotope-based approach to determine the onset date of the West African summer monsoon.
Sarah L. Jackson, Tessa R. Vance, Camilla Crockart, Andrew Moy, Christopher Plummer, and Nerilie J. Abram
Clim. Past, 19, 1653–1675, https://doi.org/10.5194/cp-19-1653-2023, https://doi.org/10.5194/cp-19-1653-2023, 2023
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Ice core records are useful tools for reconstructing past climate. However, ice cores favour recording climate conditions at times when snowfall occurs. Large snowfall events in Antarctica are often associated with warmer-than-usual temperatures. We show that this results in a tendency for the Mount Brown South ice core record to preserve a temperature record biased to the climate conditions that exist during extreme events, rather than a temperature record that reflects the mean annual climate.
Briony Kate Chamberlayne, Jonathan James Tyler, Deborah Haynes, Yuexiao Shao, John Tibby, and Bronwyn May Gillanders
Clim. Past, 19, 1383–1396, https://doi.org/10.5194/cp-19-1383-2023, https://doi.org/10.5194/cp-19-1383-2023, 2023
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We used geochemical signals in shells preserved in sediments to create a 1750-year record of hydrological change in the Coorong Lagoon of South Australia. The record is interpreted to reflect the balance of evaporation and precipitation and shows that it has always been a highly evaporated system. The record also shows similarities to other environmental reconstructions from the region. This knowledge can increase our understanding of the potential impacts of environmental change.
Gabriel West, Darrell S. Kaufman, Martin Jakobsson, and Matt O'Regan
Geochronology, 5, 285–299, https://doi.org/10.5194/gchron-5-285-2023, https://doi.org/10.5194/gchron-5-285-2023, 2023
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We report aspartic and glutamic acid racemization analyses on Neogloboquadrina pachyderma and Cibicidoides wuellerstorfi from the Arctic Ocean (AO). The rates of racemization in the species are compared. Calibrating the rate of racemization in C. wuellerstorfi for the past 400 ka allows the estimation of sample ages from the central AO. Estimated ages are older than existing age assignments (as previously observed for N. pachyderma), confirming that differences are not due to taxonomic effects.
Aymeric P. M. Servettaz, Anaïs J. Orsi, Mark A. J. Curran, Andrew D. Moy, Amaelle Landais, Joseph R. McConnell, Trevor J. Popp, Emmanuel Le Meur, Xavier Faïn, and Jérôme Chappellaz
Clim. Past, 19, 1125–1152, https://doi.org/10.5194/cp-19-1125-2023, https://doi.org/10.5194/cp-19-1125-2023, 2023
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The temperature of the past 2000 years is still poorly known in vast parts of the East Antarctic plateau. In this study, we present temperature reconstructions based on water and gas stable isotopes from the Aurora Basin North ice core. Spatial and temporal significance of each proxy differs, and we can identify some cold periods in the snow temperature up to 2°C cooler in the 1000–1400 CE period, which could not be determined with water isotopes only.
Maria-Elena Vorrath, Juliane Müller, Paola Cárdenas, Thomas Opel, Sebastian Mieruch, Oliver Esper, Lester Lembke-Jene, Johan Etourneau, Andrea Vieth-Hillebrand, Niko Lahajnar, Carina B. Lange, Amy Leventer, Dimitris Evangelinos, Carlota Escutia, and Gesine Mollenhauer
Clim. Past, 19, 1061–1079, https://doi.org/10.5194/cp-19-1061-2023, https://doi.org/10.5194/cp-19-1061-2023, 2023
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Sea ice is important to stabilize the ice sheet in Antarctica. To understand how the global climate and sea ice were related in the past we looked at ancient molecules (IPSO25) from sea-ice algae and other species whose dead cells accumulated on the ocean floor over time. With chemical analyses we could reconstruct the history of sea ice and ocean temperatures of the past 14 000 years. We found out that sea ice became less as the ocean warmed, and more phytoplankton grew towards today's level.
Rachel M. Walter, Hussein R. Sayani, Thomas Felis, Kim M. Cobb, Nerilie J. Abram, Ariella K. Arzey, Alyssa R. Atwood, Logan D. Brenner, Émilie P. Dassié, Kristine L. DeLong, Bethany Ellis, Julien Emile-Geay, Matthew J. Fischer, Nathalie F. Goodkin, Jessica A. Hargreaves, K. Halimeda Kilbourne, Hedwig Krawczyk, Nicholas P. McKay, Andrea L. Moore, Sujata A. Murty, Maria Rosabelle Ong, Riovie D. Ramos, Emma V. Reed, Dhrubajyoti Samanta, Sara C. Sanchez, Jens Zinke, and the PAGES CoralHydro2k Project Members
Earth Syst. Sci. Data, 15, 2081–2116, https://doi.org/10.5194/essd-15-2081-2023, https://doi.org/10.5194/essd-15-2081-2023, 2023
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Accurately quantifying how the global hydrological cycle will change in the future remains challenging due to the limited availability of historical climate data from the tropics. Here we present the CoralHydro2k database – a new compilation of peer-reviewed coral-based climate records from the last 2000 years. This paper details the records included in the database and where the database can be accessed and demonstrates how the database can investigate past tropical climate variability.
Jack A. Hutchings and Bronwen L. Konecky
Atmos. Meas. Tech., 16, 1663–1682, https://doi.org/10.5194/amt-16-1663-2023, https://doi.org/10.5194/amt-16-1663-2023, 2023
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The coupled variation of the three stable isotopes of oxygen in water is being studied as a relatively new tracer of the water cycle. Measurement by laser spectroscopy has a number of pitfalls that have hampered a wider exploration of this new tracer. We demonstrate successful analysis using Picarro's L2140-i analyzer and provide recommendations for other users. We find that removal of dissolved organic carbon is required when measurements are studied near the limits of instrumental accuracy.
Christo Buizert, Sarah Shackleton, Jeffrey P. Severinghaus, William H. G. Roberts, Alan Seltzer, Bernhard Bereiter, Kenji Kawamura, Daniel Baggenstos, Anaïs J. Orsi, Ikumi Oyabu, Benjamin Birner, Jacob D. Morgan, Edward J. Brook, David M. Etheridge, David Thornton, Nancy Bertler, Rebecca L. Pyne, Robert Mulvaney, Ellen Mosley-Thompson, Peter D. Neff, and Vasilii V. Petrenko
Clim. Past, 19, 579–606, https://doi.org/10.5194/cp-19-579-2023, https://doi.org/10.5194/cp-19-579-2023, 2023
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It is unclear how different components of the global atmospheric circulation, such as the El Niño effect, respond to large-scale climate change. We present a new ice core gas proxy, called krypton-86 excess, that reflects past storminess in Antarctica. We present data from 11 ice cores that suggest the new proxy works. We present a reconstruction of changes in West Antarctic storminess over the last 24 000 years and suggest these are caused by north–south movement of the tropical rain belt.
Jan Petřík, Katarína Adameková, Sándor Kele, Rastislav Milovský, Libor Petr, Peter Tóth, and Nicholas McKay
EGUsphere, https://doi.org/10.5194/egusphere-2023-118, https://doi.org/10.5194/egusphere-2023-118, 2023
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Our analysis of the Santovka sedimentary record in Slovakia uncovered two major climate shifts at 8.2 and 7.4 ka BP. These shifts likely impacted temperature and humidity, and/or air mass circulation, and were caused by the drying of the lake at 7.4 ka BP. The sedimentary infill provides important information on the region's past climate, and future research must focus on its impact on the last hunter gatherers and first farmers in the context of spreading agriculture in Europe.
Michael P. Erb, Nicholas P. McKay, Nathan Steiger, Sylvia Dee, Chris Hancock, Ruza F. Ivanovic, Lauren J. Gregoire, and Paul Valdes
Clim. Past, 18, 2599–2629, https://doi.org/10.5194/cp-18-2599-2022, https://doi.org/10.5194/cp-18-2599-2022, 2022
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To look at climate over the past 12 000 years, we reconstruct spatial temperature using natural climate archives and information from model simulations. Our results show mild global mean warmth around 6000 years ago, which differs somewhat from past reconstructions. Undiagnosed seasonal biases in the data could explain some of the observed temperature change, but this still would not explain the large difference between many reconstructions and climate models over this period.
Franziska Tell, Lukas Jonkers, Julie Meilland, and Michal Kucera
Biogeosciences, 19, 4903–4927, https://doi.org/10.5194/bg-19-4903-2022, https://doi.org/10.5194/bg-19-4903-2022, 2022
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This study analyses the production of calcite shells formed by one of the main Arctic pelagic calcifiers, the foraminifera N. pachyderma. Using vertically resolved profiles of shell concentration, size and weight, we show that calcification occurs throughout the upper 300 m with an average production flux below the calcification zone of 8 mg CaCO3 m−2 d−1 representing 23 % of the total pelagic biogenic carbonate production. The production flux is attenuated in the twilight zone by dissolution.
Loeka L. Jongejans, Kai Mangelsdorf, Cornelia Karger, Thomas Opel, Sebastian Wetterich, Jérémy Courtin, Hanno Meyer, Alexander I. Kizyakov, Guido Grosse, Andrei G. Shepelev, Igor I. Syromyatnikov, Alexander N. Fedorov, and Jens Strauss
The Cryosphere, 16, 3601–3617, https://doi.org/10.5194/tc-16-3601-2022, https://doi.org/10.5194/tc-16-3601-2022, 2022
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Large parts of Arctic Siberia are underlain by permafrost. Climate warming leads to permafrost thaw. At the Batagay megaslump, permafrost sediments up to ~ 650 kyr old are exposed. We took sediment samples and analysed the organic matter (e.g. plant remains). We found distinct differences in the biomarker distributions between the glacial and interglacial deposits with generally stronger microbial activity during interglacial periods. Further permafrost thaw enhances greenhouse gas emissions.
Lenneke M. Jong, Christopher T. Plummer, Jason L. Roberts, Andrew D. Moy, Mark A. J. Curran, Tessa R. Vance, Joel B. Pedro, Chelsea A. Long, Meredith Nation, Paul A. Mayewski, and Tas D. van Ommen
Earth Syst. Sci. Data, 14, 3313–3328, https://doi.org/10.5194/essd-14-3313-2022, https://doi.org/10.5194/essd-14-3313-2022, 2022
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Ice core records from Law Dome in East Antarctica, collected over the the last 3 decades, provide high-resolution data for studies of the climate of Antarctica, Australia and the Southern and Indo-Pacific oceans. Here, we present a set of annually dated records from Law Dome covering the last 2000 years. This dataset provides an update and extensions both forward and back in time of previously published subsets of the data, bringing them together into a coherent set with improved dating.
Nicky M. Wright, Claire E. Krause, Steven J. Phipps, Ghyslaine Boschat, and Nerilie J. Abram
Clim. Past, 18, 1509–1528, https://doi.org/10.5194/cp-18-1509-2022, https://doi.org/10.5194/cp-18-1509-2022, 2022
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The Southern Annular Mode (SAM) is a major mode of climate variability. Proxy-based SAM reconstructions show changes that last millennium climate simulations do not reproduce. We test the SAM's sensitivity to solar forcing using simulations with a range of solar values and transient last millennium simulations with large-amplitude solar variations. We find that solar forcing can alter the SAM and that strong solar forcing transient simulations better match proxy-based reconstructions.
Stephanie H. Arcusa, Nicholas P. McKay, Charlotte Wiman, Sela Patterson, Samuel E. Munoz, and Marco A. Aquino-López
Geochronology, 4, 409–433, https://doi.org/10.5194/gchron-4-409-2022, https://doi.org/10.5194/gchron-4-409-2022, 2022
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Annually banded lake sediment can track environmental change with high resolution in locations where alternatives are not available. Yet, information about chronology is often affected by poor appearance. Traditional methods struggle with these records. To overcome this obstacle we demonstrate a Bayesian approach that combines information from radiocarbon dating and laminations on cores from Columbine Lake, Colorado, expanding possibilities for producing high-resolution records globally.
Darrell S. Kaufman and Nicholas P. McKay
Clim. Past, 18, 911–917, https://doi.org/10.5194/cp-18-911-2022, https://doi.org/10.5194/cp-18-911-2022, 2022
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Global mean surface temperatures are rising to levels unprecedented in over 100 000 years. This conclusion takes into account both recent global warming and likely future warming, which thereby enables a direct comparison with paleotemperature reconstructions on multi-century timescales.
Tobias Erhardt, Matthias Bigler, Urs Federer, Gideon Gfeller, Daiana Leuenberger, Olivia Stowasser, Regine Röthlisberger, Simon Schüpbach, Urs Ruth, Birthe Twarloh, Anna Wegner, Kumiko Goto-Azuma, Takayuki Kuramoto, Helle A. Kjær, Paul T. Vallelonga, Marie-Louise Siggaard-Andersen, Margareta E. Hansson, Ailsa K. Benton, Louise G. Fleet, Rob Mulvaney, Elizabeth R. Thomas, Nerilie Abram, Thomas F. Stocker, and Hubertus Fischer
Earth Syst. Sci. Data, 14, 1215–1231, https://doi.org/10.5194/essd-14-1215-2022, https://doi.org/10.5194/essd-14-1215-2022, 2022
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The datasets presented alongside this manuscript contain high-resolution concentration measurements of chemical impurities in deep ice cores, NGRIP and NEEM, from the Greenland ice sheet. The impurities originate from the deposition of aerosols to the surface of the ice sheet and are influenced by source, transport and deposition processes. Together, these records contain detailed, multi-parameter records of past climate variability over the last glacial period.
Lauren J. Davies, Britta J. L. Jensen, and Darrell S. Kaufman
Geochronology, 4, 121–141, https://doi.org/10.5194/gchron-4-121-2022, https://doi.org/10.5194/gchron-4-121-2022, 2022
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Subarctic and Arctic lake sediments provide key data to understand natural climate variability and future climate change. However, they can be difficult to date accurately and of limited use without a robust chronology. We use volcanic ash deposits from the last ~4000 BP to identify anomalously old radiocarbon ages at Cascade Lake, Alaska. A provisional ~15 000-year Bayesian age model is produced for the lake, and a new location for ash from five Late Holocene eruptions is reported.
Lukas Jonkers, Geert-Jan A. Brummer, Julie Meilland, Jeroen Groeneveld, and Michal Kucera
Clim. Past, 18, 89–101, https://doi.org/10.5194/cp-18-89-2022, https://doi.org/10.5194/cp-18-89-2022, 2022
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The variability in the geochemistry among individual foraminifera is used to reconstruct seasonal to interannual climate variability. This method requires that each foraminifera shell accurately records environmental conditions, which we test here using a sediment trap time series. Even in the absence of environmental variability, planktonic foraminifera display variability in their stable isotope ratios that needs to be considered in the interpretation of individual foraminifera data.
Lukas Jonkers, Oliver Bothe, and Michal Kucera
Clim. Past, 17, 2577–2581, https://doi.org/10.5194/cp-17-2577-2021, https://doi.org/10.5194/cp-17-2577-2021, 2021
Camilla K. Crockart, Tessa R. Vance, Alexander D. Fraser, Nerilie J. Abram, Alison S. Criscitiello, Mark A. J. Curran, Vincent Favier, Ailie J. E. Gallant, Christoph Kittel, Helle A. Kjær, Andrew R. Klekociuk, Lenneke M. Jong, Andrew D. Moy, Christopher T. Plummer, Paul T. Vallelonga, Jonathan Wille, and Lingwei Zhang
Clim. Past, 17, 1795–1818, https://doi.org/10.5194/cp-17-1795-2021, https://doi.org/10.5194/cp-17-1795-2021, 2021
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We present preliminary analyses of the annual sea salt concentrations and snowfall accumulation in a new East Antarctic ice core, Mount Brown South. We compare this record with an updated Law Dome (Dome Summit South site) ice core record over the period 1975–2016. The Mount Brown South record preserves a stronger and inverse signal for the El Niño–Southern Oscillation (in austral winter and spring) compared to the Law Dome record (in summer).
Aleix Cortina-Guerra, Juan José Gomez-Navarro, Belen Martrat, Juan Pedro Montávez, Alessandro Incarbona, Joan O. Grimalt, Marie-Alexandrine Sicre, and P. Graham Mortyn
Clim. Past, 17, 1523–1532, https://doi.org/10.5194/cp-17-1523-2021, https://doi.org/10.5194/cp-17-1523-2021, 2021
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During late 20th century a singular Mediterranean circulation episode called the Eastern Mediterranean Transient (EMT) event occurred. It involved changes on the seawater physical and biogeochemical properties, which can impact areas broadly. Here, using paleosimulations for the last 1000 years we found that the East Atlantic/Western Russian atmospheric mode was the main driver of the EMT-type events in the past, and enhancement of this mode was coetaneous with low solar insolation.
Anja Rösel, Sinead Louise Farrell, Vishnu Nandan, Jaqueline Richter-Menge, Gunnar Spreen, Dmitry V. Divine, Adam Steer, Jean-Charles Gallet, and Sebastian Gerland
The Cryosphere, 15, 2819–2833, https://doi.org/10.5194/tc-15-2819-2021, https://doi.org/10.5194/tc-15-2819-2021, 2021
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Recent observations in the Arctic suggest a significant shift towards a snow–ice regime caused by deep snow on thin sea ice which may result in a flooding of the snowpack. These conditions cause the brine wicking and saturation of the basal snow layers which lead to a subsequent underestimation of snow depth from snow radar mesurements. As a consequence the calculated sea ice thickness will be biased towards higher values.
Douglas P. Steen, Joseph S. Stoner, Jason P. Briner, and Darrell S. Kaufman
Geochronology Discuss., https://doi.org/10.5194/gchron-2021-19, https://doi.org/10.5194/gchron-2021-19, 2021
Publication in GChron not foreseen
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Paleomagnetic data from Cascade Lake (Brooks Range, Alaska) extend the radiometric-based age model of the sedimentary sequence extending back 21 kyr. Correlated ages based on prominent features in paleomagnetic secular variations (PSV) diverge from the radiometric ages in the upper 1.6 m, by up to about 2000 years at around 4 ka. Four late Holocene cryptotephra in this section support the PSV chronology and suggest the influence of hard water or aged organic material.
Sarah E. Parker, Sandy P. Harrison, Laia Comas-Bru, Nikita Kaushal, Allegra N. LeGrande, and Martin Werner
Clim. Past, 17, 1119–1138, https://doi.org/10.5194/cp-17-1119-2021, https://doi.org/10.5194/cp-17-1119-2021, 2021
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Regional trends in the oxygen isotope (δ18O) composition of stalagmites reflect several climate processes. We compare stalagmite δ18O records from monsoon regions and model simulations to identify the causes of δ18O variability over the last 12 000 years, and between glacial and interglacial states. Precipitation changes explain the glacial–interglacial δ18O changes in all monsoon regions; Holocene trends are due to a combination of precipitation, atmospheric circulation and temperature changes.
Cody C. Routson, Darrell S. Kaufman, Nicholas P. McKay, Michael P. Erb, Stéphanie H. Arcusa, Kendrick J. Brown, Matthew E. Kirby, Jeremiah P. Marsicek, R. Scott Anderson, Gonzalo Jiménez-Moreno, Jessica R. Rodysill, Matthew S. Lachniet, Sherilyn C. Fritz, Joseph R. Bennett, Michelle F. Goman, Sarah E. Metcalfe, Jennifer M. Galloway, Gerrit Schoups, David B. Wahl, Jesse L. Morris, Francisca Staines-Urías, Andria Dawson, Bryan N. Shuman, Daniel G. Gavin, Jeffrey S. Munroe, and Brian F. Cumming
Earth Syst. Sci. Data, 13, 1613–1632, https://doi.org/10.5194/essd-13-1613-2021, https://doi.org/10.5194/essd-13-1613-2021, 2021
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We present a curated database of western North American Holocene paleoclimate records, which have been screened on length, resolution, and geochronology. The database gathers paleoclimate time series that reflect temperature, hydroclimate, or circulation features from terrestrial and marine sites, spanning a region from Mexico to Alaska. This publicly accessible collection will facilitate a broad range of paleoclimate inquiry.
Nicholas P. McKay, Julien Emile-Geay, and Deborah Khider
Geochronology, 3, 149–169, https://doi.org/10.5194/gchron-3-149-2021, https://doi.org/10.5194/gchron-3-149-2021, 2021
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This paper describes geoChronR, an R package that streamlines the process of quantifying age uncertainties, propagating uncertainties through several common analyses, and visualizing the results. In addition to describing the structure and underlying theory of the package, we present five real-world use cases that illustrate common workflows in geoChronR. geoChronR is built on the Linked PaleoData framework, is open and extensible, and we welcome feedback and contributions from the community.
Ikumi Oyabu, Kenji Kawamura, Kyotaro Kitamura, Remi Dallmayr, Akihiro Kitamura, Chikako Sawada, Jeffrey P. Severinghaus, Ross Beaudette, Anaïs Orsi, Satoshi Sugawara, Shigeyuki Ishidoya, Dorthe Dahl-Jensen, Kumiko Goto-Azuma, Shuji Aoki, and Takakiyo Nakazawa
Atmos. Meas. Tech., 13, 6703–6731, https://doi.org/10.5194/amt-13-6703-2020, https://doi.org/10.5194/amt-13-6703-2020, 2020
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Air in polar ice cores provides information on past atmosphere and climate. We present a new method for simultaneously measuring eight gases (CH4, N2O and CO2 concentrations; isotopic ratios of N2 and O2; elemental ratios between N2, O2 and Ar; and total air content) from single ice-core samples with high precision.
Maria-Elena Vorrath, Juliane Müller, Lorena Rebolledo, Paola Cárdenas, Xiaoxu Shi, Oliver Esper, Thomas Opel, Walter Geibert, Práxedes Muñoz, Christian Haas, Gerhard Kuhn, Carina B. Lange, Gerrit Lohmann, and Gesine Mollenhauer
Clim. Past, 16, 2459–2483, https://doi.org/10.5194/cp-16-2459-2020, https://doi.org/10.5194/cp-16-2459-2020, 2020
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We tested the applicability of the organic biomarker IPSO25 for sea ice reconstructions in the industrial era at the western Antarctic Peninsula. We successfully evaluated our data with satellite sea ice observations. The comparison with marine and ice core records revealed that sea ice interpretations must consider climatic and sea ice dynamics. Sea ice biomarker production is mainly influenced by the Southern Annular Mode, while the El Niño–Southern Oscillation seems to have a minor impact.
Chris S. M. Turney, Richard T. Jones, Nicholas P. McKay, Erik van Sebille, Zoë A. Thomas, Claus-Dieter Hillenbrand, and Christopher J. Fogwill
Earth Syst. Sci. Data, 12, 3341–3356, https://doi.org/10.5194/essd-12-3341-2020, https://doi.org/10.5194/essd-12-3341-2020, 2020
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The Last Interglacial (129–116 ka) experienced global temperatures and sea levels higher than today. The direct contribution of warmer conditions to global sea level (thermosteric) are uncertain. We report a global network of sea surface temperatures. We find mean global annual temperature anomalies of 0.2 ± 0.1˚C and an early maximum peak of 0.9 ± 0.1˚C. Our reconstruction suggests warmer waters contributed on average 0.08 ± 0.1 m and a peak contribution of 0.39 ± 0.1 m to global sea level.
Sebastian Wetterich, Alexander Kizyakov, Michael Fritz, Juliane Wolter, Gesine Mollenhauer, Hanno Meyer, Matthias Fuchs, Aleksei Aksenov, Heidrun Matthes, Lutz Schirrmeister, and Thomas Opel
The Cryosphere, 14, 4525–4551, https://doi.org/10.5194/tc-14-4525-2020, https://doi.org/10.5194/tc-14-4525-2020, 2020
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In the present study, we analysed geochemical and sedimentological properties of relict permafrost and ground ice exposed at the Sobo-Sise Yedoma cliff in the eastern Lena delta in NE Siberia. We obtained insight into permafrost aggradation and degradation over the last approximately 52 000 years and the climatic and morphodynamic controls on regional-scale permafrost dynamics of the central Laptev Sea coastal region.
Laia Comas-Bru, Kira Rehfeld, Carla Roesch, Sahar Amirnezhad-Mozhdehi, Sandy P. Harrison, Kamolphat Atsawawaranunt, Syed Masood Ahmad, Yassine Ait Brahim, Andy Baker, Matthew Bosomworth, Sebastian F. M. Breitenbach, Yuval Burstyn, Andrea Columbu, Michael Deininger, Attila Demény, Bronwyn Dixon, Jens Fohlmeister, István Gábor Hatvani, Jun Hu, Nikita Kaushal, Zoltán Kern, Inga Labuhn, Franziska A. Lechleitner, Andrew Lorrey, Belen Martrat, Valdir Felipe Novello, Jessica Oster, Carlos Pérez-Mejías, Denis Scholz, Nick Scroxton, Nitesh Sinha, Brittany Marie Ward, Sophie Warken, Haiwei Zhang, and SISAL Working Group members
Earth Syst. Sci. Data, 12, 2579–2606, https://doi.org/10.5194/essd-12-2579-2020, https://doi.org/10.5194/essd-12-2579-2020, 2020
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This paper presents an updated version of the SISAL (Speleothem Isotope Synthesis and Analysis) database. This new version contains isotopic data from 691 speleothem records from 294 cave sites and new age–depth models, including their uncertainties, for 512 speleothems.
Chris M. Brierley, Anni Zhao, Sandy P. Harrison, Pascale Braconnot, Charles J. R. Williams, David J. R. Thornalley, Xiaoxu Shi, Jean-Yves Peterschmitt, Rumi Ohgaito, Darrell S. Kaufman, Masa Kageyama, Julia C. Hargreaves, Michael P. Erb, Julien Emile-Geay, Roberta D'Agostino, Deepak Chandan, Matthieu Carré, Partrick J. Bartlein, Weipeng Zheng, Zhongshi Zhang, Qiong Zhang, Hu Yang, Evgeny M. Volodin, Robert A. Tomas, Cody Routson, W. Richard Peltier, Bette Otto-Bliesner, Polina A. Morozova, Nicholas P. McKay, Gerrit Lohmann, Allegra N. Legrande, Chuncheng Guo, Jian Cao, Esther Brady, James D. Annan, and Ayako Abe-Ouchi
Clim. Past, 16, 1847–1872, https://doi.org/10.5194/cp-16-1847-2020, https://doi.org/10.5194/cp-16-1847-2020, 2020
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This paper provides an initial exploration and comparison to climate reconstructions of the new climate model simulations of the mid-Holocene (6000 years ago). These use state-of-the-art models developed for CMIP6 and apply the same experimental set-up. The models capture several key aspects of the climate, but some persistent issues remain.
Zoltán Kern, Dániel Erdélyi, Polona Vreča, Ines Krajcar Bronić, István Fórizs, Tjaša Kanduč, Marko Štrok, László Palcsu, Miklós Süveges, György Czuppon, Balázs Kohán, and István Gábor Hatvani
Earth Syst. Sci. Data, 12, 2061–2073, https://doi.org/10.5194/essd-12-2061-2020, https://doi.org/10.5194/essd-12-2061-2020, 2020
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Here we present the spatially continuous gridded database for amount-weighted annual mean tritium activity in precipitation for the period 1976 to 2017 for the Adriatic–Pannonian region, with a special focus on the years after 2010, which are not represented by existing global models. This AP3H database is capable of providing reliable spatiotemporal input for hydrogeological applications at any place within Slovenia, Hungary, and their surroundings.
Cited articles
Abram, N. J., McGregor, H. V., Tierney, J. E., Evans, M. N., McKay, N. P.,
Kaufman, D. S., and PAGES 2k Consortium: Early onset of industrial-era warming across the oceans and continents, Nature, 536, 411–418, 2016.
Aggarwal, P. K., Alduchov, O. A., Froehlich, K. O., Araguas-Araguas, L. J.,
Sturchio, N. C., and Kurita, N.: Stable isotopes in global precipitation: A
unified interpretation based on atmospheric moisture residence time, Geophys. Res. Lett., 39, L11705, https://doi.org/10.1029/2012GL051937, 2012.
Anchukaitis, K. J. and McKay, N.: PAGES2k: Advances in climate field
reconstructions, Past Global Changes Mag., 22, 98, 2014.
Atkinson, T. C., Harmon, R. S., Smart, P. L., and Waltham, A. C.: Palaeoclimatic and geomorphic implications of 230Th∕234U dates on speleothems from Britain, Nature, 272, 24–28, 1978.
Atsawawaranunt, K., Comas-Bru, L., Amirnezhad Mozhdehi, S., Deininger, M., Harrison, S. P., Baker, A., Boyd, M., Kaushal, N., Ahmad, S. M., Ait Brahim, Y., Arienzo, M., Bajo, P., Braun, K., Burstyn, Y., Chawchai, S., Duan, W., Hatvani, I. G., Hu, J., Kern, Z., Labuhn, I., Lachniet, M., Lechleitner, F. A., Lorrey, A., Pérez-Mejías, C., Pickering, R., Scroxton, N., and SISAL Working Group Members: The SISAL database: a global resource to document oxygen and carbon isotope records from speleothems, Earth Syst. Sci. Data, 10, 1687–1713, https://doi.org/10.5194/essd-10-1687-2018, 2018.
Azzoug, M., Carré, M., and Schauer, A. J.: Reconstructing the duration of
the West African Monsoon season from growth patterns and isotopic signals of
shells of Anadara senilis (Saloum Delta, Senegal), Palaeogeogr. Palaeocl., 346, 145–152, 2012.
Black, B. A., Andersson, C., Butler, P. G., Carroll, M. L., DeLong, K. L., Reynolds, D. J., Schöne, B. R., Scourse, J., van der Sleen, P., Wanamaker, A. D., and Witbaard, R.: The revolution of crossdating in marine palaeoecology and palaeoclimatology, Biol. Lett., 15, 20180665, https://doi.org/10.1098/rsbl.2018.0665, 2019.
Bowen, G. J., Cai, Z., Fiorella, R. P., and Putman, A. L.: Isotopes in the
water cycle: regional-to global-scale patterns and applications, Annu. Rev.
Earth Planet. Sci., 47, 453–479, 2019.
Brady, E., Stevenson, S., Bailey, D., Liu, Z., Noone, D., Nusbaumer, J.,
Otto-Bliesner, B. L., Tabor, C., Tomas, R., Wong, T., and Zhang, J.: The
connected isotopic water cycle in the Community Earth System Model version 1, J. Adv. Model. Earth Syst., 11, 2547–2566, 2019.
Cahyarini, S. Y., Pfeiffer, M., Timm, O., Dullo, W.-C., and Schönberg, D.
G.: Reconstructing seawater δ18O from paired coral δ18O and Sr∕Ca ratios: Methods, error analysis and problems, with examples from Tahiti (French Polynesia) and Timor (Indonesia), Geochim. Cosmochim. Ac., 72, 2841–2853, 2008.
Carilli, J. E., McGregor, H. V., Gaudry, J. J., Donner, S. D., Gagan, M. K.,
Stevenson, S., Wong, H., and Fink, D.: Equatorial Pacific coral geochemical
records show recent weakening of the Walker Circulation, Paleoceanography, 29, 1031–1045, 2014.
Carré, M., Azzoug, M., Zaharias, P., Camara, A., Cheddadi, R., Chevalier, M., Fiorillo, D., Gaye, A. T., Janicot, S., Khodri, M., and Others: Modern drought conditions in western Sahel unprecedented in the past 1600 years, Clim. Dynam., 52, 1949–1964, 2019.
Castañeda, I. S. and Schouten, S.: A review of molecular organic proxies
for examining modern and ancient lacustrine environments, Quaternary Sci. Rev., 30, 2851–2891, 2011.
Chapligin, B., Narancic, B., Meyer, H., and Pienitz, R.: Paleo-environmental
gateways in the eastern Canadian Arctic-recent isotope hydrology and diatom
oxygen isotopes from Nettilling Lake, Baffin Island, Canada, Quaternary Sci. Rev., 147, 379–390, 2016.
Cobb, K. M., Charles, C. D., Cheng, H., and Edwards, R. L.: El Niño/Southern Oscillation and tropical Pacific climate during the last
millennium, Nature, 424, 271–276, 2003.
Conroy, J. L., Overpeck, J. T., Cole, J. E., Shanahan, T. M., and Steinitz-Kannan, M.: Holocene changes in eastern tropical Pacific climate
inferred from a Galápagos lake sediment record, Quaternary Sci. Rev., 27, 1166–1180, 2008.
Conroy, J. L., Thompson, D. M., Cobb, K. M., Noone, D., Rea, S., and Legrande, A. N.: Spatiotemporal variability in the δ18O-salinity relationship of seawater across the tropical Pacific Ocean, Paleoceanography, 32, 484–497, 2017.
Corrège, T.: Sea surface temperature and salinity reconstruction from
coral geochemical tracers, Palaeogeogr. Palaeocl., 232, 408–428, 2006.
Dansgaard, W.: Stable isotopes in precipitation, Tellus, 16, 436–468, 1964.
Dayem, K. E., Molnar, P., Battisti, D. S., and Roe, G. H.: Lessons learned
from oxygen isotopes in modern precipitation applied to interpretation of
speleothem records of paleoclimate from eastern Asia, Earth Planet. Sc. Lett., 295, 219–230, 2010.
Dean, J. R., Eastwood, W. J., Roberts, N., Jones, M. D., Yiğitbaşıoğlu, H., Allcock, S. L., Woodbridge, J., Metcalfe, S. E., and Leng, M. J.: Tracking the hydro-climatic signal from lake to sediment: A field study from central Turkey, J. Hydrol., 529, 608–621, 2015.
Dee, S., Emile-Geay, J., Evans, M. N., Allam, A., Steig, E. J., and Thompson,
D. M.: PRYSM: An open-source framework for PRoxY System Modeling, with applications to oxygen-isotope systems, J. Adv. Model. Earth Syst., 7, 1220–1247, 2015.
Dee, S. G., Steiger, N. J., Emile-Geay, J., and Hakim, G. J.: On the utility
of proxy system models for estimating climate states over the Common Era, J. Adv. Model. Earth Syst., 8, 1164–1179, 2016.
Dee, S. G., Russell, J. M., Morrill, C., Chen, Z., and Neary, A.: PRYSM v2. 0: A Proxy System Model for Lacustrine Archives, Paleoceanogr.
Paleocl., 33, 1250–1269, 2018.
Dolman, A. M. and Laepple, T.: Sedproxy: a forward model for sediment-archived climate proxies, Clim. Past, 14, 1851–1868, https://doi.org/10.5194/cp-14-1851-2018, 2018.
Druffel, E. R. M.: Geochemistry of corals: Proxies of past ocean chemistry,
ocean circulation, and climate, P. Natl. Acad. Sci. USA, 94, 8354–8361, 1997.
Eichler, A., Brütsch, S., Olivier, S., Papina, T., and Schwikowski, M.: A
750 year ice core record of past biogenic emissions from Siberian boreal
forests, Geophys. Res. Lett., 36, L18813, https://doi.org/10.1029/2009GL038807, 2009.
Elderfield, H. and Ganssen, G.: Past temperature and δ18O of
surface ocean waters inferred from foraminiferal Mg∕Ca ratios, Nature, 405, 442–445, 2000.
Emile-Geay, J. and Eshleman, J. A.: Toward a semantic web of paleoclimatology, Geochem. Geophy. Geosy., 14, 457–469, 2013.
Evans, M. N., Tolwinski-Ward, S. E., Thompson, D. M., and Anchukaitis, K. J.:
Applications of proxy system modeling in high resolution paleoclimatology,
Quaternary Sci. Rev., 76, 16–28, 2013.
Fairchild, I. J. and Baker, A.: Speleothem science: from process to past
environments, John Wiley & Sons, 2012.
Fischer, M. J.: Predictable components in global speleothem δ18O, Quaternary Sci. Rev., 131, 380–392, 2016.
Gagan, M. K., Ayliffe, L. K., Hopley, D., Cali, J. A., Mortimer, G. E.,
Chappell, J., McCulloch, M. T., and Head, M. J.: Temperature and surface-ocean water balance of the mid-Holocene tropical western Pacific,
Science, 279, 1014–1018, 1998.
Galewsky, J., Steen-Larsen, H. C., Field, R. D., Worden, J., Risi, C., and
Schneider, M.: Stable isotopes in atmospheric water vapor and applications to the hydrologic cycle, Rev. Geophys., 54, 809–865, 2016.
Gat, J.: Isotope Hydrology: A Study of the Water Cycle, Imperial College
Press, London, UK, 2010.
Gibson, J. J., Birks, S. J., Yi, Y., Moncur, M. C., and McEachern, P. M.:
Stable isotope mass balance of fifty lakes in central Alberta: Assessing the
role of water balance parameters in determining trophic status and lake level, J. Hydrol.: Reg. Stud., 6, 13–25, 2016.
Good, S. P., Mallia, D. V., Lin, J. C., and Bowen, G. J.: Stable isotope
analysis of precipitation samples obtained via crowdsourcing reveals the
spatiotemporal evolution of Superstorm Sandy, PLoS One, 9, e91117, https://doi.org/10.1371/journal.pone.0091117, 2014.
Goursaud, S., Masson-Delmotte, V., Favier, V., Preunkert, S., Legrand, M., Minster, B., and Werner, M.: Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica, The Cryosphere, 13, 1297–1324, https://doi.org/10.5194/tc-13-1297-2019, 2019.
Grottoli, A. G. and Eakin, C. M.: A review of modern coral δ18O and Δ14C proxy records, Earth-Sci. Rev., 81, 67–91, 2007.
Haese, B., Werner, M., and Lohmann, G.: Stable water isotopes in the coupled atmosphere–land surface model ECHAM5-JSBACH, Geosci. Model Dev., 6, 1463–1480, https://doi.org/10.5194/gmd-6-1463-2013, 2013.
Hakim, G. J., Emile-Geay, J., Steig, E. J., Noone, D., Anderson, D. M., Tardif, R., Steiger, N., and Perkins, W. A.: The last millennium climate
reanalysis project: Framework and first results, J. Geophys. Res.-Atmos., 121, 6745–6764, 2016.
Halder, J., Terzer, S., Wassenaar, L. I., Araguás-Araguás, L. J., and Aggarwal, P. K.: The Global Network of Isotopes in Rivers (GNIR): integration of water isotopes in watershed observation and riverine research, Hydrol. Earth Syst. Sci., 19, 3419–3431, https://doi.org/10.5194/hess-19-3419-2015, 2015.
Heyng, A. M., Mayr, C., Lücke, A., Wissel, H., and Striewski, B.: Late
Holocene hydrologic changes in northern New Zealand inferred from stable
isotope values of aquatic cellulose in sediments from Lake Pupuke, J. Paleolimnol., 51, 485–497, 2014.
Hodell, D. A., Brenner, M., Curtis, J. H., and Guilderson, T.: Solar forcing
of drought frequency in the Maya lowlands, Science, 292, 1367–1370, 2001.
Hurley, J. V., Vuille, M., and Hardy, D. R.: Forward modeling of δ18O in Andean ice cores, Geophys. Res. Lett., 43, 8178–8188,
2016.
IAEA/WMO: Global Network of Isotopes in Precipitation: The GNIP Database,
available at: http://www.iaea.org/water, last access: 8 March 2019.
iso2k1_0_0: LiPDverse page for Iso2k Current Version, available at: http://lipdverse.org/iso2k/current_version/, last access: 30 July 2020.
NOAA: NOAA Study Page for Iso2k Database, available at: http://www.ncdc.noaa.gov/paleo/study/29593, last access: 30 July 2020.
Jones, M. D. and Dee, S. G.: Global-scale proxy system modelling of oxygen
isotopes in lacustrine carbonates: New insights from isotope-enabled-model
proxy-data comparison, Quaternary Sci. Rev., 202, 19–29, 2018.
Jones, M. D., Cuthbert, M. O., Leng, M. J., McGowan, S., Mariethoz, G.,
Arrowsmith, C., Sloane, H. J., Humphrey, K. K., and Cross, I.: Comparisons of
observed and modelled lake δ18O variability, Quaternary Sci.
Rev., 131, 329–340, 2016.
Jonkers, L. and Kučera, M.: Global analysis of seasonality in the shell flux of extant planktonic Foraminifera, Biogeosciences, 12, 2207–2226, https://doi.org/10.5194/bg-12-2207-2015, 2015.
Jonkers, L. and Kučera, M.: Quantifying the effect of seasonal and
vertical habitat tracking on planktonic foraminifera proxies, Clim. Past,
13, 573–586, https://doi.org/10.5194/cp-13-573-2017, 2017.
Kaufman, D.: A community-driven framework for climate reconstructions, Eos
Trans. Am. Geophys. Union, 95, 361–362, 2014.
Kelley, C. P., Mohtadi, S., Cane, M. A., Seager, R., and Kushnir, Y.: Climate
change in the Fertile Crescent and implications of the recent Syrian drought, P. Natl. Acad. Sci. USA, 112, 3241–3246, 2015.
Kiefer, J. and Karamperidou, C.: High-Resolution Modeling of ENSO-Induced
Precipitation in the Tropical Andes: Implications for Proxy Interpretation,
Paleoceanogr. Paleocl., 34, 217–236, 2019.
Kilbourne, K. H., Quinn, T. M., Webb, R., Guilderson, T., Nyberg, J., and
Winter, A.: Paleoclimate proxy perspective on Caribbean climate since the
year 1751: Evidence of cooler temperatures and multidecadal variability,
Paleoceanography, 23, PA3220, https://doi.org/10.1029/2008PA001598, 2008.
Konecky, B. L. and McKay, N. P.: NOAA/WDS Paleoclimatology – Iso2k Database,
NOAA National Centers for Environmental Information, NOAA, https://doi.org/10.25921/57j8-vs18, 2020.
Konecky, B., Comas-Bru, L., and Dassié, E.: Assessing hydroclimate patterns of the past 2000 years with paleo-δ18O and δD records, Past Global Changes Mag., 25, 111, 2017.
Konecky, B. L., Comas-Bru, L., Dassié, E., DeLong, K., and Partin, J.: Piecing together the big picture on water and climate, EOS, 99, https://doi.org/10.1029/2018EO095283, 2018.
Konecky, B., Dee, S. G., and Noone, D.: WaxPSM: A forward model of leaf wax hydrogen isotope ratios to bridge proxy and model estimates of past climate, J. Geophys. Res.-Biogeo., 124, 2107–2125, 2019a.
Konecky, B. L., Noone, D. C., and Cobb, K. M.: The influence of competing
hydroclimate processes on stable isotope ratios in tropical rainfall, Geophys. Res. Lett., 46, 1622–1633, 2019b.
Kurita, N., Noone, D., Risi, C., Schmidt, G. A., Yamada, H., and Yoneyama,
K.: Intraseasonal isotopic variation associated with the Madden-Julian
Oscillation, J. Geophys. Res.-Atmos., 116, D24101, https://doi.org/10.1029/2010JD015209, 2011.
Lachniet, M. S.: Climatic and environmental controls on speleothem oxygen-isotope values, Quaternary Sci. Rev., 28, 412–432, 2009.
LeGrande, A. N. and Schmidt, G. A.: Global gridded data set of the oxygen
isotopic composition in seawater, Geophys. Res. Lett., 33, L12604, https://doi.org/10.1029/2006GL026011, 2006.
Leng, M. J. and Marshall, J. D.: Palaeoclimate interpretation of stable isotope data from lake sediment archives, Quaternary Sci. Rev., 23, 811–831, 2004.
Liu, Z., Carlson, A. E., He, F., Brady, E. C., Otto-Bliesner, B. L., Briegleb, B. P., Wehrenberg, M., Clark, P. U., Wu, S., Cheng, J., Zhang, J., Noone, D., and Zhu, J.: Younger Dryas cooling and the Greenland climate response to CO2, P. Natl. Acad. Sci. USA, 109, 11101–11104, 2012.
Lough, J. M.: Climate records from corals, WIREs Clim. Change, 1, 318–331, 2010.
McCarroll, D. and Loader, N. J.: Stable isotopes in tree rings, Quaternary
Sci. Reviews, 23, 771–801, 2004.
McGregor, H. V., Evans, M. N., Goosse, H., Leduc, G., Martrat, B., Addison, J. A., Mortyn, P. G., Oppo, D. W., Seidenkrantz, M.-S., Sicre, M.-A., Phipps, S. J., Selvaraj, K., Thirumalai, K., Filipsson, H. L., and Ersek, V.: Robust global ocean cooling trend for the pre-industrial Common Era, Nat. Geosci., 8, 671–677, 2015.
McKay, N. P. and Emile-Geay, J.: Technical note: The Linked Paleo Data framework – a common tongue for paleoclimatology, Clim. Past, 12, 1093–1100, https://doi.org/10.5194/cp-12-1093-2016, 2016.
McKay, N. P. and Kaufman, D. S.: An extended Arctic proxy temperature database for the past 2,000 years, Scient. Data, 1, 140026, https://doi.org/10.1038/sdata.2014.26, 2014.
Meese, D. A., Gow, A. J., Grootes, P., Stuiver, M., Mayewski, P. A., Zielinski, G. A., Ram, M., Taylor, K. C., and Waddington, E. D.: The
accumulation record from the GISP2 core as an indicator of climate change
throughout the Holocene, Science, 266, 1680–1682, 1994.
Meilland, J., Siccha, M., Weinkauf, M. F. G., Jonkers, L., Morard, R.,
Baranowski, U., Baumeister, A., Bertlich, J., Brummer, G.-J., Debray, P., Fritz-endres, T., Groeneveld, J., Magerl, L., Munz, P., Rillo, M. C., Schmidt, C., Takagi, H., Theara, G., and Kucera, M.: Highly replicated sampling reveals no diurnal vertical migration but stable species-specific vertical habitats in planktonic foraminifera, J. Plankt. Res., 41, 127–141, 2019.
Meyer, H., Opel, T., Laepple, T., Dereviagin, A. Y., Hoffmann, K., and Werner, M.: Long-term winter warming trend in the Siberian Arctic during the
mid- to late Holocene, Nat. Geosci., 8, 122–125, 2015.
Mills, K., Schillereff, D., Saulnier-Talbot, É., Gell, P., Anderson, N.
J., Arnaud, F., Dong, X., Jones, M., McGowan, S., Massaferro, J., Moorhouse, H., Perez, L., and Ryves, D. B.: Deciphering long-term records of natural variability and human impact as recorded in lake sediments: a palaeolimnological puzzle, Wiley Interdisciplin. Rev.: Water, 4, e1195, https://doi.org/10.1002/wat2.1195, 2017.
Moerman, J. W., Cobb, K. M., Adkins, J. F., Sodemann, H., Clark, B., and Tuen, A. A.: Diurnal to interannual rainfall δ18O variations in northern Borneo driven by regional hydrology, Earth Planet. Sc. Lett.,
369–370, 108–119, 2013.
Moerman, J. W., Cobb, K. M., Partin, J. W., Meckler, A. N., Carolin, S. A.,
Adkins, J. F., Lejau, S., Malang, J., Clark, B., and Tuen, A. A.: Transformation of ENSO-related rainwater to dripwater δ18O
variability by vadose water mixing, Geophys. Res. Lett., 41, 7907–7915, 2014.
Morrill, C.: The influence of Asian summer monsoon variability on the water
balance of a Tibetan lake, J. Paleolimnol., 32, 273–286, 2004.
Nusbaumer, J., Wong, T. E., Bardeen, C., and Noone, D.: Evaluating hydrological processes in the Community Atmosphere Model Version 5 (CAM5)
using stable isotope ratios of water, J. Adv. Model. Earth Syst., 9, 949–977, 2017.
O'Neil, J. R.: Hydrogen and oxygen isotope fractionation between ice and water, J. Phys. Chem., 72, 3683–3684, 1968.
Opel, T., Meyer, H., Wetterich, S., Laepple, T., Dereviagin, A., and Murton,
J.: Ice wedges as archives of winter paleoclimate: A review, Permafrost
Periglac. Process., 29, 199–209, 2018.
PAGES Hydro2k Consortium: Comparing proxy and model estimates of hydroclimate variability and change over the Common Era, Clim. Past, 13, 1851–1900, https://doi.org/10.5194/cp-13-1851-2017, 2017.
PAGES 2k Consortium: Continental-scale temperature variability during the past two millennia, Nat. Geosci., 6, 339–346, 2013.
PAGES 2k Consortium: A global multiproxy database for temperature
reconstructions of the Common Era, Scient. Data, 4, 170088, https://doi.org/10.1038/sdata.2017.88, 2017.
PAGES 2k Consortium: Consistent multidecadal variability in global temperature reconstructions and simulations over the Common Era, Nat. Geosci., 12, 643–649, 2019.
PAGES 2k Network Coordinators: Understanding the climate of the past 2000 years: Phase 3 of the PAGES 2k Network, PAGES Mag., 25, 110–110, 2017.
Partin, J. W., Jenson, J. W., Banner, J. L., Quinn, T. M., Taylor, F. W.,
Sinclair, D., Hardt, B., Lander, M. A., Bell, T., Miklavič, B., Jocson, J. M. U., and Taboroši, D.,: Relationship between modern rainfall variability, cave dripwater, and stalagmite geochemistry in Guam, USA, Geochem. Geophy. Geosy., 13, Q03013, https://doi.org/10.1029/2011GC003930, 2012.
Partin, J. W., Konecky, B., and Iso2k Project Members: Iso2k: A community-driven effort to develop a global database of paleo-water isotopes covering the past two millennia, in: American Geophysical Union Fall Meeting Abstracts, 14–18 December 2015, San Francisco, CA, USA, 2015.
Porter, T. J. and Opel, T.: Recent advances in paleoclimatological studies of Arctic wedge- and pore-ice stable-water isotope records, Permafrost Periglac. Process., 19, 170088, https://doi.org/10.1002/ppp.2052, 2020.
Porter, T. J., Pisaric, M. F. J., Field, R. D., Kokelj, S. V., Edwards, T.
W. D., deMontigny, P., Healy, R., and LeGrande, A. N.: Spring–summer
temperatures since AD 1780 reconstructed from stable oxygen isotope ratios
in white spruce tree-rings from the Mackenzie Delta, northwestern Canada,
Clim. Dynam., 42, 771–785, 2014.
Porter, T. J., Froese, D. G., Feakins, S. J., Bindeman, I. N., Mahony, M.
E., Pautler, B. G., Reichart, G.-J., Sanborn, P. T., Simpson, M. J., and
Weijers, J. W. H.: Multiple water isotope proxy reconstruction of extremely
low last glacial temperatures in Eastern Beringia (Western Arctic), Quaternary Sci. Rev., 137, 113–125, 2016.
Porter, T. J., Schoenemann, S. W., Davies, L. J., Steig, E. J., Bandara, S.,
and Froese, D. G.: Recent summer warming in northwestern Canada exceeds the
Holocene thermal maximum, Nat. Commun., 10, 1631, https://doi.org/10.1038/s41467-019-09622-y, 2019.
Rach, O., Kahmen, A., Brauer, A., and Sachse, D.: A dual-biomarker approach
for quantification of changes in relative humidity from sedimentary lipid D∕H ratios, Clim. Past, 13, 741–757, https://doi.org/10.5194/cp-13-741-2017, 2017.
Rasmussen, S. O., Svensson, A., and Winstrup, M.: State of the art of ice core annual layer dating, Pages Mag., 22, 26–27, 2014.
Rodysill, J. R., Russell, J. M., Vuille, M., Dee, S., Lunghino, B., and Bijaksana, S.: La Niña-driven flooding in the Indo-Pacific warm pool during the past millennium, Quaternary Sci. Rev., 225, 106020, https://doi.org/10.1016/j.quascirev.2019.106020, 2019.
Rosenheim, B. E., Swart, P. K., Thorrold, S. R., Eisenhauer, A., and Willenz,
P.: Salinity change in the subtropical Atlantic: Secular increase and
teleconnections to the North Atlantic Oscillation, Geophys. Res. Lett.,
32, L02603, https://doi.org/10.1029/2004GL021499, 2005.
Rozanski, K., Araguás-Araguás, L., and Gonfiantini, R.: Isotopic
patterns in modern global precipitation, in: Climate Change in Continental
Isotopic Records, vol. 78, Wiley Online Library, 1–36, 1993.
Rozanski, K., Klisch, M. A., Wachniew, P., Gorczyca, Z., Goslar, T., Edwards, T. W. D., and Shemesh, A.: Oxygen-isotope geothermometers in lacustrine sediments: New insights through combined δ18O analyses of aquatic cellulose, authigenic calcite and biogenic silica in Lake Gościąż, central Poland, Geochim. Cosmochim. Ac., 74, 2957–2969, 2010.
Russon, T., Tudhope, A. W., Hegerl, G. C., Collins, M., and Tindall, J.:
Inter-annual tropical Pacific climate variability in an isotope-enabled
CGCM: implications for interpreting coral stable oxygen isotope records of
ENSO, Clim. Past, 9, 1543–1557, https://doi.org/10.5194/cp-9-1543-2013, 2013.
Sachse, D., Billault, I., Bowen, G. J., Chikaraishi, Y., Dawson, T. E.,
Feakins, S. J., Freeman, K. H., Magill, C. R., McInerney, F. A., Van der Meer, M. T. J., Polissar, P., Robins, R. J., Sachs, J. P., Schmidt, H.-L., Sessions, A. L., White, J. W. C., West, J. B., and Kahmen, A.: Molecular paleohydrology: interpreting the hydrogen-isotopic composition of lipid biomarkers from photosynthesizing organisms, Annu. Rev. Earth Planet. Sci., 40, 221–249, 2012.
Sadler, J., Webb, G. E., Nothdurft, L. D., and Dechnik, B.: Geochemistry-based coral palaeoclimate studies and the potential of
“non-traditional” (non-massive Porites) corals: recent developments and
future progression, Earth-Sci. Rev., 139, 291–316, 2014.
Schouten, S., Ossebaar, J., Schreiber, K., Kienhuis, M. V. M., Langer, G., Benthien, A., and Bijma, J.: The effect of temperature, salinity and growth rate on the stable hydrogen isotopic composition of long chain alkenones produced by Emiliania huxleyi and Gephyrocapsa oceanica, Biogeosciences, 3, 113–119, https://doi.org/10.5194/bg-3-113-2006, 2006.
Schweingruber, F. H.: Tree rings: basics and applications of dendrochronology, Springer Science & Business Media, Springer Netherlands, 2012.
Sigl, M., McConnell, J. R., Toohey, M., Curran, M., Das, S. B., Edwards, R.,
Isaksson, E., Kawamura, K., Kipfstuhl, S., Krüger, K., Layman, L., Maselli, O. J., Motizuki, Y., Motoyama, H., Pasteris, D. R., and Severi, M.: Insights from Antarctica on volcanic forcing during the Common Era, Nat. Clim. Change, 48, 693–679, 2014.
Spero, H. J., Bijma, J., Lea, D. W., and Bemis, B. E.: Effect of seawater
carbonate concentration on foraminiferal carbon and oxygen isotopes, Nature,
390, 497–500, 1997.
Steiger, N. J., Hakim, G. J., Steig, E. J., Battisti, D. S., and Roe, G. H.:
Assimilation of time-averaged pseudoproxies for climate reconstruction, J. Climate, 27, 426–441, 2014.
Steiger, N. J., Smerdon, J. E., Cook, E. R., and Cook, B. I.: A reconstruction of global hydroclimate and dynamical variables over the Common Era, Scient. Data, 5, 180086, https://doi.org/10.1038/sdata.2018.86, 2018.
Stenni, B., Curran, M. A. J., Abram, N. J., Orsi, A., Goursaud, S., Masson-Delmotte, V., Neukom, R., Goosse, H., Divine, D., van Ommen, T., Steig, E. J., Dixon, D. A., Thomas, E. R., Bertler, N. A. N., Isaksson, E., Ekaykin, A., Werner, M., and Frezzotti, M.: Antarctic climate variability on regional and continental scales over the last 2000 years, Clim. Past, 13, 1609–1634, https://doi.org/10.5194/cp-13-1609-2017, 2017.
Stevenson, S., Powell, B. S., Merrifield, M. A., Cobb, K. M., Nusbaumer, J., and Noone, D.: Characterizing seawater oxygen isotopic variability in a regional ocean modeling framework: Implications for coral proxy records,
Paleoceanography, 30, 1573–1593, 2015.
Stevenson, S., Powell, B., Cobb, K., Nusbaumer, J., Merrifield, M., and Noone, D.: Twentieth Century Seawater δ18O Dynamics and
Implications for Coral-Based Climate Reconstruction, Paleoceanogr. Paleocl., 33, 606–625, 2018.
Sundqvist, H. S., Kaufman, D. S., McKay, N. P., Balascio, N. L., Briner, J. P., Cwynar, L. C., Sejrup, H. P., Seppä, H., Subetto, D. A., Andrews, J. T., Axford, Y., Bakke, J., Birks, H. J. B., Brooks, S. J., de Vernal, A., Jennings, A. E., Ljungqvist, F. C., Rühland, K. M., Saenger, C., Smol, J. P., and Viau, A. E.: Arctic Holocene proxy climate database – new approaches to assessing geochronological accuracy and encoding climate variables, Clim. Past, 10, 1605–1631, https://doi.org/10.5194/cp-10-1605-2014, 2014.
Surge, D. and Schöne, B. R.: Looking back over skeletal diaries? High-resolution environmental reconstructions from accretionary hard parts
of aquatic organisms, Palaeogeogr. Palaeocl., 228, 1–3, 2005.
Swann, G. E. A., Mackay, A. W., Vologina, E., Jones, M. D., Panizzo, V. N.,
Leng, M. J., Sloane, H. J., Snelling, A. M., and Sturm, M.: Lake Baikal isotope records of Holocene central Asian precipitation, Quaternary Sci. Rev., 189, 210–222, 2018.
Taylor, R. G., Todd, M. C., Kongola, L., Maurice, L., Nahozya, E., Sanga, H.,
and MacDonald, A. M.: Evidence of the dependence of groundwater resources on
extreme rainfall in East Africa, Nat. Clim. Change, 3, 374–378, 2013.
Terzer, S., Wassenaar, L. I., Araguás-Araguás, L. J., and Aggarwal, P. K.: Global isoscapes for δ18O and δ2H in precipitation: improved prediction using regionalized climatic regression models, Hydrol. Earth Syst. Sci., 17, 4713–4728, https://doi.org/10.5194/hess-17-4713-2013, 2013.
Thomas, E. K., Briner, J. P., Ryan-Henry, J. J., and Huang, Y.: A major increase in winter snowfall during the middle Holocene on western Greenland
caused by reduced sea ice in Baffin Bay and the Labrador Sea, Geophys. Res. Lett., 43, 5302–5308, 2016.
Thomas, E. K., Castañeda, I. S., McKay, N. P., Briner, J. P., Salacup, J. M., Nguyen, K. Q., and Schweinsberg, A. D.: A wetter Arctic coincident with hemispheric warming 8,000 years ago, Geophys. Res. Lett., 45, 10–637, 2018.
Thompson, D. M., Ault, T. R., Evans, M. N., Cole, J. E., and Emile-Geay, J.:
Comparison of observed and simulated tropical climate trends using a forward
model of coral δ18O, Geophys. Res. Lett., 38, L14706, https://doi.org/10.1029/2011GL048224, 2011.
Thompson, L. G., Mosley-Thompson, E., Dansgaard, W., and Grootes, P. M.: The
Little Ice Age as recorded in the stratigraphy of the tropical Quelccaya ice
cap, Science, 234, 361–364, 1986.
Tierney, J. E., Abram, N. J., Anchukaitis, K. J., Evans, M. N., Giry, C.,
Kilbourne, K. H., Saenger, C. P., Wu, H. C., and Zinke, J.: Tropical sea
surface temperatures for the past four centuries reconstructed from coral archives, Paleoceanography, 30, 226–252, 2015.
Tyler, J. J., Leng, M. J., and Arrowsmith, C.: Seasonality and the isotope
hydrology of Lochnagar, a Scottish mountain lake: implications for
palaeoclimate research, Holocene, 17, 717–727, 2007.
Urey, H. C.: Oxygen isotopes in nature and in the laboratory, Science, 108, 489–496, 1948.
Van Hardenbroek, M., Chakraborty, A., Davies, K. L., Harding, P., Heiri, O.,
Henderson, A. C. G., Holmes, J. A., Lasher, G. E., Leng, M. J., Panizzo, V.
N., Roberts, L., Schilder, J., Trueman, C. N., and Wooller, M. J.: The stable isotope composition of organic and inorganic fossils in lake sediment records: Current understanding, challenges, and future directions, Quaternary Sci. Rev., 196, 154–176, 2018.
Von Grafenstein, U., Erlenkeuser, H., Müller, J., Jouzel, J., and Johnsen, S.: The cold event 8200 years ago documented in oxygen isotope
records of precipitation in Europe and Greenland, Clim. Dynam., 14, 73–81, 1998.
Worden, J., Noone, D., Bowman, K., and The Tropospheric Emission Spectrometer science team and data contributors: Importance of rain evaporation and continental convection in the tropical water cycle, Nature, 445, 528–532, 2007.
Wright, J. S., Fu, R., Worden, J. R., Chakraborty, S., Clinton, N. E., Risi,
C., Sun, Y., and Yin, L.: Rainforest-initiated wet season onset over the
southern Amazon, P. Natl. Acad. Sci. USA, 114, 8481–8486, 2017.
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