Articles | Volume 15, issue 5
https://doi.org/10.5194/essd-15-2081-2023
© Author(s) 2023. 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-15-2081-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Data description paper
| 
24 May 2023
Data description paper |
| 24 May 2023
| 24 May 2023
The CoralHydro2k database: a global, actively curated compilation of coral δ18O and Sr ∕ Ca proxy records of tropical ocean hydrology and temperature for the Common Era
Rachel M. Walter
School of Earth and Atmospheric Sciences, Georgia Institute of
Technology, Georgia, Atlanta, 30332, USA
present address: Langan Engineering and Environmental Inc, Parsippany, New Jersey, 07054, USA
School of Earth and Atmospheric Sciences, Georgia Institute of
Technology, Georgia, Atlanta, 30332, USA
present address: Langan Engineering and Environmental Inc, Parsippany, New Jersey, 07054, USA
Thomas Felis
MARUM – Center for Marine Environmental Sciences, University of
Bremen, 28359 Bremen, Germany
Kim M. Cobb
School of Earth and Atmospheric Sciences, Georgia Institute of
Technology, Georgia, Atlanta, 30332, USA
Nerilie J. Abram
ARC Centre of Excellence for Climate Extremes, The Australian National University, Canberra, 2601, Australia
Research School of Earth Sciences, The Australian National University, Canberra, 2601, Australia
Ariella K. Arzey
School of Earth, Atmospheric and Life Sciences, University of
Wollongong, Wollongong, 2522, Australia
Alyssa R. Atwood
Department of Earth, Ocean and Atmospheric Science, Florida State
University, Tallahassee, Florida, 32306, USA
Logan D. Brenner
Department of Environmental Science, Barnard College, New York, New York, 10027, USA
Émilie P. Dassié
UMR 5805 EPOC – CNRS – OASU – Université de Bordeaux, Pessac, 33615, France
Kristine L. DeLong
Department of Geography and Anthropology and Coastal Studies
Institute, Louisiana State University, Baton Rouge, Louisiana, 70803, USA
Bethany Ellis
Research School of Earth Sciences, The Australian National University, Canberra, 2601, Australia
New South Wales Department of Primary Industries, Orange, 2800,
Australia
Julien Emile-Geay
Department of Earth Sciences, University of Southern California, Los Angeles, California, 90089, USA
Matthew J. Fischer
NST Environment, ANSTO, Lucas Heights, 2234, Australia
Nathalie F. Goodkin
Department of Earth and Planetary Sciences, American Museum of
Natural History, New York, New York, 10021, USA
Jessica A. Hargreaves
MARUM – Center for Marine Environmental Sciences, University of
Bremen, 28359 Bremen, Germany
ARC Centre of Excellence for Climate Extremes, The Australian National University, Canberra, 2601, Australia
Research School of Earth Sciences, The Australian National University, Canberra, 2601, Australia
K. Halimeda Kilbourne
Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science, Solomons, Maryland, 20657, USA
Hedwig Krawczyk
School of Geography, Geology and the Environment, University of
Leicester, Leicester, LE1 7RH, UK
Nicholas P. McKay
School of Earth and Sustainability, Northern Arizona University,
Flagstaff, Arizona, 86011, USA
Andrea L. Moore
Department of Earth, Ocean and Atmospheric Science, Florida State
University, Tallahassee, Florida, 32306, USA
Sujata A. Murty
Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, New York, 12222, USA
Maria Rosabelle Ong
Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York, 10964, USA
Riovie D. Ramos
Department of Environmental Science, William Paterson University of New Jersey, Wayne, New Jersey, 07470, USA
Department of Geosciences, University of Arizona, Tucson, Arizona, 85721, USA
Emma V. Reed
Department of Geosciences, University of Arizona, Tucson, Arizona, 85721, USA
Dhrubajyoti Samanta
Earth Observatory of Singapore, Nanyang Technological University,
Singapore, 639798, Singapore
Sara C. Sanchez
Department of Atmospheric and Oceanic Sciences, University of
Colorado, Boulder, Colorado, 80309, USA
Jens Zinke
School of Geography, Geology and the Environment, University of
Leicester, Leicester, LE1 7RH, UK
A full list of authors appears at the end of the paper.
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A coral reconstruction of past climate shows changes in the seasonal cycle of sea surface temperature in the SE tropical Indian Ocean. An enhanced seasonal cycle suggests that the tropical rainfall belt shifted northwards between 1855–1917. We explain this with greater warming in the NE Indian Ocean relative to the SE, which strengthens surface winds and coastal upwelling, leading to greater cooling in the eastern Indian Ocean south of the Equator.
Christopher L. Hancock, Michael P. Erb, Nicholas P. McKay, and Sylvia G. Dee
EGUsphere, https://doi.org/10.5194/egusphere-2024-746, https://doi.org/10.5194/egusphere-2024-746, 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.
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.
Zhi Yang Koh, Benjamin S. Grandey, Dhrubajyoti Samanta, Adam D. Switzer, Benjamin P. Horton, Justin Dauwels, and Lock Yue Chew
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Identifying tide-surge interaction (TSI) can be a complex task. We enhance existing statistical methods with a more robust test that accounts for complex tides, and investigate the influence of tidal phase alteration on TSI using a semi-empirical model. We apply these techniques to tide-gauge records from the east coast of Singapore and Malaysia. We found TSI at all studied locations, and that tidal phase alteration can change the timing of large surges with minimal impact on their height.
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.
Benjamin S. Grandey, Zhi Yang Koh, Dhrubajyoti Samanta, Benjamin P. Horton, Justin Dauwels, and Lock Yue Chew
Geosci. Model Dev., 16, 6593–6608, https://doi.org/10.5194/gmd-16-6593-2023, https://doi.org/10.5194/gmd-16-6593-2023, 2023
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Global climate models are susceptible to spurious trends known as drift. Fortunately, drift can be corrected when analysing data produced by models. To explore the uncertainty associated with drift correction, we develop a new method: Monte Carlo drift correction. For historical simulations of thermosteric sea level rise, drift uncertainty is relatively large. When analysing data susceptible to drift, researchers should consider drift uncertainty.
Feng Zhu, Julien Emile-Geay, Gregory J. Hakim, Dominique Guillot, Deborah Khider, Robert Tardif, and Walter A. Perkins
EGUsphere, https://doi.org/10.5194/egusphere-2023-2098, https://doi.org/10.5194/egusphere-2023-2098, 2023
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Climate field reconstruction encompasses methods that estimate the evolution of climate in space and time based on natural archives. It is useful to investigate climate variations and validate climate models, but its implementation and use can be difficult for non-experts. This paper introduces a user-friendly Python package called "cfr" to make these methods more accessible, thanks to the computational and visualization tools that facilitate efficient and reproducible research on past climates.
Laura Velasquez-Jimenez and Nerilie J. Abram
Clim. Past Discuss., https://doi.org/10.5194/cp-2023-64, https://doi.org/10.5194/cp-2023-64, 2023
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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 dimensional SAM index that facilitate consistency between studies, including when using different data resolutions, avoiding distortion of SAM impacts and allow more reliable results of past and future SAM trends.
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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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, Chris T. Plummer, Delia Segato, Andrea Spolaor, and Paul T. Vallelonga
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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.
Walid Naciri, Arnoud Boom, Matthew Payne, Nicola Browne, Noreen J. Evans, Philip Holdship, Kai Rankenburg, Ramasamy Nagarajan, Bradley J. McDonald, Jennifer McIlwain, and Jens Zinke
Biogeosciences, 20, 1587–1604, https://doi.org/10.5194/bg-20-1587-2023, https://doi.org/10.5194/bg-20-1587-2023, 2023
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Nicola Maher, Robert C. Jnglin Wills, Pedro DiNezio, Jeremy Klavans, Sebastian Milinski, Sara C. Sanchez, Samantha Stevenson, Malte F. Stuecker, and Xian Wu
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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.
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.
Jens Zinke, Takaaki K. Watanabe, Siren Rühs, Miriam Pfeiffer, Stefan Grab, Dieter Garbe-Schönberg, and Arne Biastoch
Clim. Past, 18, 1453–1474, https://doi.org/10.5194/cp-18-1453-2022, https://doi.org/10.5194/cp-18-1453-2022, 2022
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Salinity is an important and integrative measure of changes to the water cycle steered by changes to the balance between rainfall and evaporation and by vertical and horizontal movements of water parcels by ocean currents. However, salinity measurements in our oceans are extremely sparse. To fill this gap, we have developed a 334-year coral record of seawater oxygen isotopes that reflects salinity changes in the globally important Agulhas Current system and reveals its main oceanic drivers.
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.
Dominik Jackisch, Bi Xuan Yeo, Adam D. Switzer, Shaoneng He, Danica Linda M. Cantarero, Fernando P. Siringan, and Nathalie F. Goodkin
Nat. Hazards Earth Syst. Sci., 22, 213–226, https://doi.org/10.5194/nhess-22-213-2022, https://doi.org/10.5194/nhess-22-213-2022, 2022
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The Philippines is a nation very vulnerable to devastating typhoons. We investigate if stable isotopes of precipitation can be used to detect typhoon activities in the Philippines based on daily isotope measurements from Metropolitan Manila. We find that strong typhoons such as Rammasun, which occurred in July 2014, leave detectable isotopic signals in precipitation. Besides other factors, the distance of the typhoon to the sampling site plays a key role in influencing the signal.
Karla Rubio-Sandoval, Alessio Rovere, Ciro Cerrone, Paolo Stocchi, Thomas Lorscheid, Thomas Felis, Ann-Kathrin Petersen, and Deirdre D. Ryan
Earth Syst. Sci. Data, 13, 4819–4845, https://doi.org/10.5194/essd-13-4819-2021, https://doi.org/10.5194/essd-13-4819-2021, 2021
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The Last Interglacial (LIG) is a warm period characterized by a higher-than-present sea level. For this reason, scientists use it as an analog for future climatic conditions. In this paper, we use the World Atlas of Last Interglacial Shorelines database to standardize LIG sea-level data along the coasts of the western Atlantic and mainland Caribbean, identifying 55 unique sea-level indicators.
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).
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.
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.
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.
Bronwen L. Konecky, Nicholas P. McKay, Olga V. Churakova (Sidorova), Laia Comas-Bru, Emilie P. Dassié, Kristine L. DeLong, Georgina M. Falster, Matt J. Fischer, Matthew D. Jones, Lukas Jonkers, Darrell S. Kaufman, Guillaume Leduc, Shreyas R. Managave, Belen Martrat, Thomas Opel, Anais J. Orsi, Judson W. Partin, Hussein R. Sayani, Elizabeth K. Thomas, Diane M. Thompson, Jonathan J. Tyler, Nerilie J. Abram, Alyssa R. Atwood, Olivier Cartapanis, Jessica L. Conroy, Mark A. Curran, Sylvia G. Dee, Michael Deininger, Dmitry V. Divine, Zoltán Kern, Trevor J. Porter, Samantha L. Stevenson, Lucien von Gunten, and Iso2k Project Members
Earth Syst. Sci. Data, 12, 2261–2288, https://doi.org/10.5194/essd-12-2261-2020, https://doi.org/10.5194/essd-12-2261-2020, 2020
Lukas Jonkers, Olivier Cartapanis, Michael Langner, Nick McKay, Stefan Mulitza, Anne Strack, and Michal Kucera
Earth Syst. Sci. Data, 12, 1053–1081, https://doi.org/10.5194/essd-12-1053-2020, https://doi.org/10.5194/essd-12-1053-2020, 2020
Ellie Broadman, Lorna L. Thurston, Erik Schiefer, Nicholas P. McKay, David Fortin, Jason Geck, Michael G. Loso, Matt Nolan, Stéphanie H. Arcusa, Christopher W. Benson, Rebecca A. Ellerbroek, Michael P. Erb, Cody C. Routson, Charlotte Wiman, A. Jade Wong, and Darrell S. Kaufman
Earth Syst. Sci. Data, 11, 1957–1970, https://doi.org/10.5194/essd-11-1957-2019, https://doi.org/10.5194/essd-11-1957-2019, 2019
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Rapid climate warming is impacting physical processes in Arctic environments. Glacier–fed lakes are influenced by many of these processes, and they are impacted by the changing behavior of weather, glaciers, and rivers. We present data from weather stations, river gauging stations, lake moorings, and more, following 4 years of environmental monitoring in the watershed of Lake Peters, a glacier–fed lake in Arctic Alaska. These data can help us study the changing dynamics of this remote setting.
Robert Tardif, Gregory J. Hakim, Walter A. Perkins, Kaleb A. Horlick, Michael P. Erb, Julien Emile-Geay, David M. Anderson, Eric J. Steig, and David Noone
Clim. Past, 15, 1251–1273, https://doi.org/10.5194/cp-15-1251-2019, https://doi.org/10.5194/cp-15-1251-2019, 2019
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An updated Last Millennium Reanalysis is presented, using an expanded multi-proxy database, and proxy models representing the seasonal characteristics of proxy records, in addition to the dual sensitivity to temperature and moisture of tree-ring-width chronologies. We show enhanced skill in spatial reconstructions of key climate variables in the updated reanalysis, compared to an earlier version, resulting from the combined influences of the enhanced proxy network and improved proxy modeling.
François Klein, Nerilie J. Abram, Mark A. J. Curran, Hugues Goosse, Sentia Goursaud, Valérie Masson-Delmotte, Andrew Moy, Raphael Neukom, Anaïs Orsi, Jesper Sjolte, Nathan Steiger, Barbara Stenni, and Martin Werner
Clim. Past, 15, 661–684, https://doi.org/10.5194/cp-15-661-2019, https://doi.org/10.5194/cp-15-661-2019, 2019
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Antarctic temperature changes over the past millennia have been reconstructed from isotope records in ice cores in several studies. However, the link between both variables is complex. Here, we investigate the extent to which this affects the robustness of temperature reconstructions using pseudoproxy and data assimilation experiments. We show that the reconstruction skill is limited, especially at the regional scale, due to a weak and nonstationary covariance between δ18O and temperature.
Chris S. M. Turney, Helen V. McGregor, Pierre Francus, Nerilie Abram, Michael N. Evans, Hugues Goosse, Lucien von Gunten, Darrell Kaufman, Hans Linderholm, Marie-France Loutre, and Raphael Neukom
Clim. Past, 15, 611–615, https://doi.org/10.5194/cp-15-611-2019, https://doi.org/10.5194/cp-15-611-2019, 2019
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This PAGES (Past Global Changes) 2k (climate of the past 2000 years working group) special issue of Climate of the Past brings together the latest understanding of regional change and impacts from PAGES 2k groups across a range of proxies and regions. The special issue has emerged from a need to determine the magnitude and rate of change of regional and global climate beyond the timescales accessible within the observational record.
Jens Zinke, Juan P. D'Olivo, Christoph J. Gey, Malcolm T. McCulloch, J. Henrich Bruggemann, Janice M. Lough, and Mireille M. M. Guillaume
Biogeosciences, 16, 695–712, https://doi.org/10.5194/bg-16-695-2019, https://doi.org/10.5194/bg-16-695-2019, 2019
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Here we report seasonally resolved sea surface temperature (SST) reconstructions for the southern Mozambique Channel in the SW Indian Ocean, a region located along the thermohaline ocean surface circulation route, based on multi-trace-element temperature proxy records preserved in two Porites sp. coral cores for the past 42 years. Particularly, we show the suitability of both separate and combined Sr / Ca and Li / Mg proxies for improved multielement SST reconstructions.
Richard H. Levy, Gavin B. Dunbar, Marcus J. Vandergoes, Jamie D. Howarth, Tony Kingan, Alex R. Pyne, Grant Brotherston, Michael Clarke, Bob Dagg, Matthew Hill, Evan Kenton, Steve Little, Darcy Mandeno, Chris Moy, Philip Muldoon, Patrick Doyle, Conrad Raines, Peter Rutland, Delia Strong, Marianna Terezow, Leise Cochrane, Remo Cossu, Sean Fitzsimons, Fabio Florindo, Alexander L. Forrest, Andrew R. Gorman, Darrell S. Kaufman, Min Kyung Lee, Xun Li, Pontus Lurcock, Nicholas McKay, Faye Nelson, Jennifer Purdie, Heidi A. Roop, S. Geoffrey Schladow, Abha Sood, Phaedra Upton, Sharon L. Walker, and Gary S. Wilson
Sci. Dril., 24, 41–50, https://doi.org/10.5194/sd-24-41-2018, https://doi.org/10.5194/sd-24-41-2018, 2018
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A new annually resolvable sedimentary record of southern hemisphere climate has been recovered from Lake Ohau, South Island, New Zealand. The Lake Ohau Climate History (LOCH) Project acquired cores from two sites that preserve an 80 m thick sequence of laminated mud that accumulated since the lake formed ~ 17 000 years ago. Cores were recovered using a purpose-built barge and drilling system designed to recover soft sediment from relatively thick sedimentary sequences at water depths up to 100 m.
Michael Sigl, Nerilie J. Abram, Jacopo Gabrieli, Theo M. Jenk, Dimitri Osmont, and Margit Schwikowski
The Cryosphere, 12, 3311–3331, https://doi.org/10.5194/tc-12-3311-2018, https://doi.org/10.5194/tc-12-3311-2018, 2018
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The fast retreat of Alpine glaciers since the mid-19th century documented in photographs is used as a symbol for the human impact on global climate, yet the key driving forces remain elusive. Here we argue that not industrial soot but volcanic eruptions were responsible for an apparently accelerated deglaciation starting in the 1850s. Our findings support a negligible role of human activity in forcing glacier recession at the end of the Little Ice Age, highlighting the role of natural drivers.
Bryan N. Shuman, Cody Routson, Nicholas McKay, Sherilyn Fritz, Darrell Kaufman, Matthew E. Kirby, Connor Nolan, Gregory T. Pederson, and Jeannine-Marie St-Jacques
Clim. Past, 14, 665–686, https://doi.org/10.5194/cp-14-665-2018, https://doi.org/10.5194/cp-14-665-2018, 2018
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A synthesis of 93 published records reveals that moisture availability increased over large portions of North America over the past 2000 years, the Common Era (CE). In many records, the second millennium CE tended to be wetter than the first millennium CE. The long-term changes formed the background for annual to multi-decade variations, such as "mega-droughts", and also provide a context for amplified rates of hydrologic change today.
Hansi K. A. Singh, Gregory J. Hakim, Robert Tardif, Julien Emile-Geay, and David C. Noone
Clim. Past, 14, 157–174, https://doi.org/10.5194/cp-14-157-2018, https://doi.org/10.5194/cp-14-157-2018, 2018
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The Atlantic Multidecadal Oscillation (AMO) is prominent in the climate system. We study the AMO over the last 2000 years using a novel proxy framework, the Last Millennium Reanalysis. We find that the AMO is linked to continental warming, Arctic sea ice retreat, and an Atlantic precipitation shift. Low clouds decrease globally. We find no distinct multidecadal spectral peak in the AMO over the last 2 millennia, suggesting that human activities may have enhanced the AMO in the modern era.
PAGES Hydro2k Consortium
Clim. Past, 13, 1851–1900, https://doi.org/10.5194/cp-13-1851-2017, https://doi.org/10.5194/cp-13-1851-2017, 2017
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Water availability is fundamental to societies and ecosystems, but our understanding of variations in hydroclimate (including extreme events, flooding, and decadal periods of drought) is limited due to a paucity of modern instrumental observations. We review how proxy records of past climate and climate model simulations can be used in tandem to understand hydroclimate variability over the last 2000 years and how these tools can also inform risk assessments of future hydroclimatic extremes.
Barbara Stenni, Mark A. J. Curran, Nerilie J. Abram, Anais Orsi, Sentia Goursaud, Valerie Masson-Delmotte, Raphael Neukom, Hugues Goosse, Dmitry Divine, Tas van Ommen, Eric J. Steig, Daniel A. Dixon, Elizabeth R. Thomas, Nancy A. N. Bertler, Elisabeth Isaksson, Alexey Ekaykin, Martin Werner, and Massimo Frezzotti
Clim. Past, 13, 1609–1634, https://doi.org/10.5194/cp-13-1609-2017, https://doi.org/10.5194/cp-13-1609-2017, 2017
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Within PAGES Antarctica2k, we build an enlarged database of ice core water stable isotope records. We produce isotopic composites and temperature reconstructions since 0 CE for seven distinct Antarctic regions. We find a significant cooling trend from 0 to 1900 CE across all regions. Since 1900 CE, significant warming trends are identified for three regions. Only for the Antarctic Peninsula is this most recent century-scale trend unusual in the context of last-2000-year natural variability.
Jens Zinke, Lars Reuning, Miriam Pfeiffer, Jasper A. Wassenburg, Emily Hardman, Reshad Jhangeer-Khan, Gareth R. Davies, Curtise K. C. Ng, and Dick Kroon
Biogeosciences, 13, 5827–5847, https://doi.org/10.5194/bg-13-5827-2016, https://doi.org/10.5194/bg-13-5827-2016, 2016
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Our work provides a new coral proxy-based reconstruction of sea surface temperature (SST) from the coral reefs of Rodrigues Island, located in the poorly studied south-central Indian Ocean trade wind belt. This site is well located to study the SST history of the subtropical Indian Ocean and its teleconnections with the Pacific over long timescales. Our results provide insights into biases in coral Sr / Ca-based SST reconstructions and how to avoid them.
Nicholas P. McKay and Julien Emile-Geay
Clim. Past, 12, 1093–1100, https://doi.org/10.5194/cp-12-1093-2016, https://doi.org/10.5194/cp-12-1093-2016, 2016
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The lack of accepted data formats and data standards in paleoclimatology is a growing problem that slows progress in the field. Here, we propose a preliminary data standard for paleoclimate data, general enough to accommodate all the proxy and measurement types encountered in a large international collaboration (PAGES 2k). We also introduce a data format for such structured data (Linked Paleo Data, or LiPD), leveraging recent advances in knowledge representation (Linked Open Data).
Tessa R. Vance, Jason L. Roberts, Andrew D. Moy, Mark A. J. Curran, Carly R. Tozer, Ailie J. E. Gallant, Nerilie J. Abram, Tas D. van Ommen, Duncan A. Young, Cyril Grima, Don D. Blankenship, and Martin J. Siegert
Clim. Past, 12, 595–610, https://doi.org/10.5194/cp-12-595-2016, https://doi.org/10.5194/cp-12-595-2016, 2016
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This study details a systematic approach to finding a new high-resolution East Antarctic ice core site. The study initially outlines seven criteria that a new site must fulfil, encompassing specific accumulation, ice dynamics and atmospheric circulation aspects. We then use numerous techniques including Antarctic surface mass balance syntheses, ground-truthing of satellite data by airborne radar surveys and reanalysis products to pinpoint promising regions.
J. Emile-Geay and M. Tingley
Clim. Past, 12, 31–50, https://doi.org/10.5194/cp-12-31-2016, https://doi.org/10.5194/cp-12-31-2016, 2016
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Ignoring nonlinearity in palaeoclimate records (e.g. continental run-off proxies) runs the risk of severely overstating changes in climate variability. Even with the correct model and parameters, some information is irretrievably lost by such proxies. However, we find that a simple empirical transform can do much to improve the situation, and makes them amenable to classical analyses. Doing so on two palaeo-ENSO records markedly changes some of the quantitative inferences made from such records.
H. S. Sundqvist, D. S. Kaufman, N. P. McKay, N. L. Balascio, J. P. Briner, L. C. Cwynar, H. P. Sejrup, H. Seppä, D. A. Subetto, J. T. Andrews, Y. Axford, J. Bakke, H. J. B. Birks, S. J. Brooks, A. de Vernal, A. E. Jennings, F. C. Ljungqvist, K. M. Rühland, C. Saenger, J. P. Smol, and A. E. Viau
Clim. Past, 10, 1605–1631, https://doi.org/10.5194/cp-10-1605-2014, https://doi.org/10.5194/cp-10-1605-2014, 2014
M. Comboul, J. Emile-Geay, M. N. Evans, N. Mirnateghi, K. M. Cobb, and D. M. Thompson
Clim. Past, 10, 825–841, https://doi.org/10.5194/cp-10-825-2014, https://doi.org/10.5194/cp-10-825-2014, 2014
J. Wang, J. Emile-Geay, D. Guillot, J. E. Smerdon, and B. Rajaratnam
Clim. Past, 10, 1–19, https://doi.org/10.5194/cp-10-1-2014, https://doi.org/10.5194/cp-10-1-2014, 2014
C. Giry, T. Felis, M. Kölling, W. Wei, G. Lohmann, and S. Scheffers
Clim. Past, 9, 841–858, https://doi.org/10.5194/cp-9-841-2013, https://doi.org/10.5194/cp-9-841-2013, 2013
Related subject area
Domain: ESSD – Ocean | Subject: Palaeooceanography, palaeoclimatology
DINOSTRAT version 2.1-GTS2020
An 800 kyr planktonic δ18O stack for the Western Pacific Warm Pool
Tephra data from varved lakes of the Last Glacial–Interglacial Transition: towards a global inventory and better chronologies on the Varved Sediments Database (VARDA)
BENFEP: a quantitative database of benthic foraminifera from surface sediments of the eastern Pacific
Peter K. Bijl
Earth Syst. Sci. Data, 16, 1447–1452, https://doi.org/10.5194/essd-16-1447-2024, https://doi.org/10.5194/essd-16-1447-2024, 2024
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This new version release of DINOSTRAT, version 2.1, aligns stratigraphic ranges of dinoflagellate cysts (dinocysts), a microfossil group, to the latest Geologic Time Scale. In this release I present the evolution of dinocyst subfamilies from the Middle Triassic to the modern period.
Christen L. Bowman, Devin S. Rand, Lorraine E. Lisiecki, and Samantha C. Bova
Earth Syst. Sci. Data, 16, 701–713, https://doi.org/10.5194/essd-16-701-2024, https://doi.org/10.5194/essd-16-701-2024, 2024
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We estimate an average (stack) of Western Pacific Warm Pool (WPWP) sea surface climate records over the last 800 kyr from 10 ocean sediment cores. To better understand glacial–interglacial differences between the tropical WPWP and high-latitude climate change, we compare our WPWP stack to global and North Atlantic deep-ocean stacks. Although we see similar timing in glacial–interglacial change between the stacks, the WPWP exhibits less amplitude of change.
Anna Beckett, Cecile Blanchet, Alexander Brauser, Rebecca Kearney, Celia Martin-Puertas, Ian Matthews, Konstantin Mittelbach, Adrian Palmer, Arne Ramisch, and Achim Brauer
Earth Syst. Sci. Data, 16, 595–604, https://doi.org/10.5194/essd-16-595-2024, https://doi.org/10.5194/essd-16-595-2024, 2024
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This paper focuses on volcanic ash (tephra) in European annually laminated (varve) lake records from the period 25 to 8 ka. Tephra enables the synchronisation of these lake records and their proxy reconstructions to absolute timescales. The data incorporate geochemical data from tephra layers across 19 varve lake records. We highlight the potential for synchronising multiple records using tephra layers across continental scales whilst supporting reproducibility through accessible data.
Paula Diz, Víctor González-Guitián, Rita González-Villanueva, Aida Ovejero, and Iván Hernández-Almeida
Earth Syst. Sci. Data, 15, 697–722, https://doi.org/10.5194/essd-15-697-2023, https://doi.org/10.5194/essd-15-697-2023, 2023
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Benthic foraminifera are key components of the ocean benthos and marine sediments. Determining their geographic distribution is highly relevant for improving our understanding of the recent and past ocean benthic ecosystem and establishing adequate conservation strategies. Here, we contribute to this knowledge by generating an open-access database of previously documented quantitative data of benthic foraminifera species from surface sediments of the eastern Pacific (BENFEP).
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Short summary
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.
Accurately quantifying how the global hydrological cycle will change in the future remains...
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