Articles | Volume 15, issue 4
https://doi.org/10.5194/essd-15-1801-2023
© 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-15-1801-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Data description article
| 
25 Apr 2023
Data description article |
| 25 Apr 2023
| 25 Apr 2023
Ocean cross-validated observations from R/Vs L'Atalante, Maria S. Merian, and Meteor and related platforms as part of the EUREC4A-OA/ATOMIC campaign
Pierre L'Hégaret
CORRESPONDING AUTHOR
LMD/IPSL, CNRS, ENS, École Polytechnique, Institut Polytechnique de Paris, PSL, Research University, Sorbonne Université, Paris, France
Florian Schütte
KlimaCampus, Max Planck Institute for Meteorology, Hamburg, Germany
Sabrina Speich
LMD/IPSL, CNRS, ENS, École Polytechnique, Institut Polytechnique de Paris, PSL, Research University, Sorbonne Université, Paris, France
Gilles Reverdin
CNRS, IRD, MNHN, UMR7159 L'OCÉAN/IPSL, Sorbonne Université, Paris, France
Dariusz B. Baranowski
Institute of Geophysics, Polish Academy of Sciences, Warsaw, Poland
Rena Czeschel
GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Tim Fischer
GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Gregory R. Foltz
NOAA, Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, USA
Karen J. Heywood
Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, UK
Gerd Krahmann
GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Rémi Laxenaire
LMD/IPSL, CNRS, ENS, École Polytechnique, Institut Polytechnique de Paris, PSL, Research University, Sorbonne Université, Paris, France
Caroline Le Bihan
UBO, CNRS, IRD, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, French Research Institute for Exploitation of the Sea (IFREMER), Plouzané, France
Philippe Le Bot
UBO, CNRS, IRD, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, French Research Institute for Exploitation of the Sea (IFREMER), Plouzané, France
Stéphane Leizour
UBO, CNRS, IRD, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, French Research Institute for Exploitation of the Sea (IFREMER), Plouzané, France
Callum Rollo
Voice of the Ocean Foundation, Gothenburg, Sweden
Michael Schlundt
GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Elizabeth Siddle
Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, UK
Corentin Subirade
LMD/IPSL, CNRS, ENS, École Polytechnique, Institut Polytechnique de Paris, PSL, Research University, Sorbonne Université, Paris, France
Dongxiao Zhang
Cooperative Institute for Climate, Ocean, and Ecosystem Studies, University of Washington, Seattle, WA, USA
NOAA Pacific Marine Environmental Laboratory (PMEL), Seattle, WA, USA
Johannes Karstensen
GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
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Yan Barabinot, Sabrina Speich, and Xavier Carton
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Mesoscale eddies are ubiquitous rotating currents in the ocean. Some eddies, called "materially coherent", are able to transport a different water mass from the surrounding water. By analyzing 3D eddy structures sampled during oceanographic cruises, we found that eddies can be nonmaterially coherent, accounting only for their surface properties, but materially coherent considering their properties at depth. Future studies cannot rely solely on satellite data to evaluate heat and salt transport.
Taavi Liblik, Daniel Rak, Enriko Siht, Germo Väli, Johannes Karstensen, Laura Tuomi, Louise C. Biddle, Madis-Jaak Lilover, Māris Skudra, Michael Naumann, Urmas Lips, and Volker Mohrholz
EGUsphere, https://doi.org/10.5194/egusphere-2024-2272, https://doi.org/10.5194/egusphere-2024-2272, 2024
Preprint archived
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Eight current meters were deployed to the seafloor across the Baltic to enhance knowledge about circulation and currents. The experiment was complemented by autonomous vehicles. Stable circulation patterns were observed at the sea when weather was steady. Strong and quite persistent currents were observed at the key passage for the deep-water renewal of the Northern Baltic Sea. Deep water renewal mostly occurs during spring and summer periods in the northern Baltic Sea.
Nicolas Metzl, Claire Lo Monaco, Coraline Leseurre, Céline Ridame, Gilles Reverdin, Thi Tuyet Trang Chau, Frédéric Chevallier, and Marion Gehlen
Ocean Sci., 20, 725–758, https://doi.org/10.5194/os-20-725-2024, https://doi.org/10.5194/os-20-725-2024, 2024
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In the southern Indian Ocean, south of the polar front, an observed increase of sea surface fCO2 and a decrease of pH over 1985–2021 are mainly driven by anthropogenic CO2 uptake, but in the last decade (2010–2020) fCO2 and pH were stable in summer, highlighting the competitive balance between anthropogenic CO2 and primary production. In the water column the increase of anthropogenic CO2 concentrations leads to migration of the aragonite saturation state from 600 m in 1985 up to 400 m in 2021.
Nicolas Metzl, Jonathan Fin, Claire Lo Monaco, Claude Mignon, Samir Alliouane, David Antoine, Guillaume Bourdin, Jacqueline Boutin, Yann Bozec, Pascal Conan, Laurent Coppola, Frédéric Diaz, Eric Douville, Xavier Durrieu de Madron, Jean-Pierre Gattuso, Frédéric Gazeau, Melek Golbol, Bruno Lansard, Dominique Lefèvre, Nathalie Lefèvre, Fabien Lombard, Férial Louanchi, Liliane Merlivat, Léa Olivier, Anne Petrenko, Sébastien Petton, Mireille Pujo-Pay, Christophe Rabouille, Gilles Reverdin, Céline Ridame, Aline Tribollet, Vincenzo Vellucci, Thibaut Wagener, and Cathy Wimart-Rousseau
Earth Syst. Sci. Data, 16, 89–120, https://doi.org/10.5194/essd-16-89-2024, https://doi.org/10.5194/essd-16-89-2024, 2024
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This work presents a synthesis of 44 000 total alkalinity and dissolved inorganic carbon observations obtained between 1993 and 2022 in the Global Ocean and the Mediterranean Sea at the surface and in the water column. Seawater samples were measured using the same method and calibrated with international Certified Reference Material. We describe the data assemblage, quality control and some potential uses of this dataset.
Ria Oelerich, Karen J. Heywood, Gillian M. Damerell, Marcel du Plessis, Louise C. Biddle, and Sebastiaan Swart
Ocean Sci., 19, 1465–1482, https://doi.org/10.5194/os-19-1465-2023, https://doi.org/10.5194/os-19-1465-2023, 2023
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At the southern boundary of the Antarctic Circumpolar Current, relatively warm waters encounter the colder waters surrounding Antarctica. Observations from underwater vehicles and altimetry show that medium-sized cold-core eddies influence the southern boundary's barrier properties by strengthening the slopes of constant density lines across it and amplifying its associated jet. As a result, the ability of exchanging properties, such as heat, across the southern boundary is reduced.
Jonathan Andrew Baker, Richard Renshaw, Laura Claire Jackson, Clotilde Dubois, Doroteaciro Iovino, Hao Zuo, Renellys C. Perez, Shenfu Dong, Marion Kersalé, Michael Mayer, Johannes Mayer, Sabrina Speich, and Tarron Lamont
State Planet, 1-osr7, 4, https://doi.org/10.5194/sp-1-osr7-4-2023, https://doi.org/10.5194/sp-1-osr7-4-2023, 2023
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We use ocean reanalyses, in which ocean models are combined with observations, to infer past changes in ocean circulation and heat transport in the South Atlantic. Comparing these estimates with other observation-based estimates, we find differences in their trends, variability, and mean heat transport but closer agreement in their mean overturning strength. Ocean reanalyses can help us understand the cause of these differences, which could improve estimates of ocean transports in this region.
Saeed Hariri, Sabrina Speich, Bruno Blanke, and Marina Lévy
Ocean Sci., 19, 1183–1201, https://doi.org/10.5194/os-19-1183-2023, https://doi.org/10.5194/os-19-1183-2023, 2023
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This work presents a series of studies conducted by the authors on the application of the Lagrangian approach for the connectivity analysis between different ocean locations in an idealized open-ocean model. We assess how the connectivity properties of typical oceanic flows are affected by the fine-scale circulation and discuss the challenges facing ocean connectivity estimates related to the spatial resolution. Our results are important to improve the understanding of marine ecosystems.
Sven Nicolai Katzenmeier, Maren Nothof, Hans-Werner Breiner, Tim Fischer, and Thorsten Stoeck
EGUsphere, https://doi.org/10.5194/egusphere-2023-682, https://doi.org/10.5194/egusphere-2023-682, 2023
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Open ocean productivity and food webs rely to a large part on nutrients that are being transported offshore from coastal upwelling regions via ocean eddies. Such areas are of ecological and economic (fisheries) importance, but little understood. We revealed how nutrients and microbial diversity entrapped in these eddies evolve during their offshore trajectories. This contributes to our understanding of how such large-scale processes change open oceanic "desert" regions into productive "oases".
Cathy Hohenegger, Peter Korn, Leonidas Linardakis, René Redler, Reiner Schnur, Panagiotis Adamidis, Jiawei Bao, Swantje Bastin, Milad Behravesh, Martin Bergemann, Joachim Biercamp, Hendryk Bockelmann, Renate Brokopf, Nils Brüggemann, Lucas Casaroli, Fatemeh Chegini, George Datseris, Monika Esch, Geet George, Marco Giorgetta, Oliver Gutjahr, Helmuth Haak, Moritz Hanke, Tatiana Ilyina, Thomas Jahns, Johann Jungclaus, Marcel Kern, Daniel Klocke, Lukas Kluft, Tobias Kölling, Luis Kornblueh, Sergey Kosukhin, Clarissa Kroll, Junhong Lee, Thorsten Mauritsen, Carolin Mehlmann, Theresa Mieslinger, Ann Kristin Naumann, Laura Paccini, Angel Peinado, Divya Sri Praturi, Dian Putrasahan, Sebastian Rast, Thomas Riddick, Niklas Roeber, Hauke Schmidt, Uwe Schulzweida, Florian Schütte, Hans Segura, Radomyra Shevchenko, Vikram Singh, Mia Specht, Claudia Christine Stephan, Jin-Song von Storch, Raphaela Vogel, Christian Wengel, Marius Winkler, Florian Ziemen, Jochem Marotzke, and Bjorn Stevens
Geosci. Model Dev., 16, 779–811, https://doi.org/10.5194/gmd-16-779-2023, https://doi.org/10.5194/gmd-16-779-2023, 2023
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Models of the Earth system used to understand climate and predict its change typically employ a grid spacing of about 100 km. Yet, many atmospheric and oceanic processes occur on much smaller scales. In this study, we present a new model configuration designed for the simulation of the components of the Earth system and their interactions at kilometer and smaller scales, allowing an explicit representation of the main drivers of the flow of energy and matter by solving the underlying equations.
Adriana Bailey, Franziska Aemisegger, Leonie Villiger, Sebastian A. Los, Gilles Reverdin, Estefanía Quiñones Meléndez, Claudia Acquistapace, Dariusz B. Baranowski, Tobias Böck, Sandrine Bony, Tobias Bordsdorff, Derek Coffman, Simon P. de Szoeke, Christopher J. Diekmann, Marina Dütsch, Benjamin Ertl, Joseph Galewsky, Dean Henze, Przemyslaw Makuch, David Noone, Patricia K. Quinn, Michael Rösch, Andreas Schneider, Matthias Schneider, Sabrina Speich, Bjorn Stevens, and Elizabeth J. Thompson
Earth Syst. Sci. Data, 15, 465–495, https://doi.org/10.5194/essd-15-465-2023, https://doi.org/10.5194/essd-15-465-2023, 2023
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One of the novel ways EUREC4A set out to investigate trade wind clouds and their coupling to the large-scale circulation was through an extensive network of isotopic measurements in water vapor, precipitation, and seawater. Samples were taken from the island of Barbados, from aboard two aircraft, and from aboard four ships. This paper describes the full collection of EUREC4A isotopic in situ data and guides readers to complementary remotely sensed water vapor isotope ratios.
Peter M. F. Sheehan, Gillian M. Damerell, Philip J. Leadbitter, Karen J. Heywood, and Rob A. Hall
Ocean Sci., 19, 77–92, https://doi.org/10.5194/os-19-77-2023, https://doi.org/10.5194/os-19-77-2023, 2023
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We calculate the rate of turbulent kinetic energy dissipation, i.e. the mixing driven by small-scale ocean turbulence, in the western tropical Atlantic Ocean via two methods. We find good agreement between the results of both. A region of elevated mixing is found between 200 and 500 m, and we calculate the associated heat and salt fluxes. We find that double-diffusive mixing in salt fingers, a common feature of the tropical oceans, drives larger heat and salt fluxes than the turbulent mixing.
Callum Rollo, Karen J. Heywood, and Rob A. Hall
Geosci. Instrum. Method. Data Syst., 11, 359–373, https://doi.org/10.5194/gi-11-359-2022, https://doi.org/10.5194/gi-11-359-2022, 2022
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Using an underwater buoyancy-powered autonomous glider, we collected profiles of temperature and salinity from the ocean north-east of Barbados. Most of the temperature and salinity profiles contained staircase-like structures of alternating constant values and large gradients. We wrote an algorithm to identify these staircases. We hypothesise that these staircases are prevented from forming where background gradients in temperature and salinity are too great.
Rainer Kiko, Marc Picheral, David Antoine, Marcel Babin, Léo Berline, Tristan Biard, Emmanuel Boss, Peter Brandt, Francois Carlotti, Svenja Christiansen, Laurent Coppola, Leandro de la Cruz, Emilie Diamond-Riquier, Xavier Durrieu de Madron, Amanda Elineau, Gabriel Gorsky, Lionel Guidi, Helena Hauss, Jean-Olivier Irisson, Lee Karp-Boss, Johannes Karstensen, Dong-gyun Kim, Rachel M. Lekanoff, Fabien Lombard, Rubens M. Lopes, Claudie Marec, Andrew M. P. McDonnell, Daniela Niemeyer, Margaux Noyon, Stephanie H. O'Daly, Mark D. Ohman, Jessica L. Pretty, Andreas Rogge, Sarah Searson, Masashi Shibata, Yuji Tanaka, Toste Tanhua, Jan Taucher, Emilia Trudnowska, Jessica S. Turner, Anya Waite, and Lars Stemmann
Earth Syst. Sci. Data, 14, 4315–4337, https://doi.org/10.5194/essd-14-4315-2022, https://doi.org/10.5194/essd-14-4315-2022, 2022
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The term
marine particlescomprises detrital aggregates; fecal pellets; bacterioplankton, phytoplankton and zooplankton; and even fish. Here, we present a global dataset that contains 8805 vertical particle size distribution profiles obtained with Underwater Vision Profiler 5 (UVP5) camera systems. These data are valuable to the scientific community, as they can be used to constrain important biogeochemical processes in the ocean, such as the flux of carbon to the deep sea.
Michael P. Hemming, Jan Kaiser, Jacqueline Boutin, Liliane Merlivat, Karen J. Heywood, Dorothee C. E. Bakker, Gareth A. Lee, Marcos Cobas García, David Antoine, and Kiminori Shitashima
Ocean Sci., 18, 1245–1262, https://doi.org/10.5194/os-18-1245-2022, https://doi.org/10.5194/os-18-1245-2022, 2022
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An underwater glider mission was carried out in spring 2016 near a mooring in the northwestern Mediterranean Sea. The glider deployment served as a test of a prototype ion-sensitive field-effect transistor pH sensor. Mean net community production rates were estimated from glider and buoy measurements of dissolved oxygen and inorganic carbon concentrations before and during the spring bloom. Incorporating advection is important for accurate mass budgets. Unexpected metabolic quotients were found.
Yixi Zheng, David P. Stevens, Karen J. Heywood, Benjamin G. M. Webber, and Bastien Y. Queste
The Cryosphere, 16, 3005–3019, https://doi.org/10.5194/tc-16-3005-2022, https://doi.org/10.5194/tc-16-3005-2022, 2022
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New observations reveal the Thwaites gyre in a habitually ice-covered region in the Amundsen Sea for the first time. This gyre rotates anticlockwise, despite the wind here favouring clockwise gyres like the Pine Island Bay gyre – the only other ocean gyre reported in the Amundsen Sea. We use an ocean model to suggest that sea ice alters the wind stress felt by the ocean and hence determines the gyre direction and strength. These processes may also be applied to other gyres in polar oceans.
Léa Olivier, Jacqueline Boutin, Gilles Reverdin, Nathalie Lefèvre, Peter Landschützer, Sabrina Speich, Johannes Karstensen, Matthieu Labaste, Christophe Noisel, Markus Ritschel, Tobias Steinhoff, and Rik Wanninkhof
Biogeosciences, 19, 2969–2988, https://doi.org/10.5194/bg-19-2969-2022, https://doi.org/10.5194/bg-19-2969-2022, 2022
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We investigate the impact of the interactions between eddies and the Amazon River plume on the CO2 air–sea fluxes to better characterize the ocean carbon sink in winter 2020. The region is a strong CO2 sink, previously underestimated by a factor of 10 due to a lack of data and understanding of the processes responsible for the variability in ocean carbon parameters. The CO2 absorption is mainly driven by freshwater from the Amazon entrained by eddies and by the winter seasonal cooling.
Gilles Reverdin, Claire Waelbroeck, Catherine Pierre, Camille Akhoudas, Giovanni Aloisi, Marion Benetti, Bernard Bourlès, Magnus Danielsen, Jérôme Demange, Denis Diverrès, Jean-Claude Gascard, Marie-Noëlle Houssais, Hervé Le Goff, Pascale Lherminier, Claire Lo Monaco, Herlé Mercier, Nicolas Metzl, Simon Morisset, Aïcha Naamar, Thierry Reynaud, Jean-Baptiste Sallée, Virginie Thierry, Susan E. Hartman, Edward W. Mawji, Solveig Olafsdottir, Torsten Kanzow, Anton Velo, Antje Voelker, Igor Yashayaev, F. Alexander Haumann, Melanie J. Leng, Carol Arrowsmith, and Michael Meredith
Earth Syst. Sci. Data, 14, 2721–2735, https://doi.org/10.5194/essd-14-2721-2022, https://doi.org/10.5194/essd-14-2721-2022, 2022
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The CISE-LOCEAN seawater stable isotope dataset has close to 8000 data entries. The δ18O and δD isotopic data measured at LOCEAN have uncertainties of at most 0.05 ‰ and 0.25 ‰, respectively. Some data were adjusted to correct for evaporation. The internal consistency indicates that the data can be used to investigate time and space variability to within 0.03 ‰ and 0.15 ‰ in δ18O–δD17; comparisons with data analyzed in other institutions suggest larger differences with other datasets.
Yanxin Wang, Karen J. Heywood, David P. Stevens, and Gillian M. Damerell
Ocean Sci., 18, 839–855, https://doi.org/10.5194/os-18-839-2022, https://doi.org/10.5194/os-18-839-2022, 2022
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It is important that climate models give accurate projections of future extremes in summer and winter sea surface temperature because these affect many features of the global climate system. Our results demonstrate that some models would give large errors if used for future projections of these features, and models with more detailed representation of vertical structure in the ocean tend to have a better representation of sea surface temperature, particularly in summer.
Coraline Leseurre, Claire Lo Monaco, Gilles Reverdin, Nicolas Metzl, Jonathan Fin, Claude Mignon, and Léa Benito
Biogeosciences, 19, 2599–2625, https://doi.org/10.5194/bg-19-2599-2022, https://doi.org/10.5194/bg-19-2599-2022, 2022
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Decadal trends of fugacity of CO2 (fCO2), total alkalinity (AT), total carbon (CT) and pH in surface waters are investigated in different domains of the southern Indian Ocean (45°S–57°S) from ongoing and station observations regularly conducted in summer over the period 1998–2019. The fCO2 increase and pH decrease are mainly driven by anthropogenic CO2 estimated just below the summer mixed layer, as well as by a warming south of the polar front or in the fertilized waters near Kerguelen Island.
Kai Wang, Xiujun Wang, Raghu Murtugudde, Dongxiao Zhang, and Rong-Hua Zhang
Geosci. Model Dev., 15, 1017–1035, https://doi.org/10.5194/gmd-15-1017-2022, https://doi.org/10.5194/gmd-15-1017-2022, 2022
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We use observational data of dissolved oxygen (DO) and organic nitrogen to calibrate a basin-scale model (OGCM-DEMC V1.4) and then evaluate model capacity for simulating mid-depth DO in the tropical Pacific. Sensitivity studies show that enhanced vertical mixing combined with reduced biological consumption performs well in reproducing asymmetric oxygen minimum zones (OMZs). We find that DO is more sensitive to biological processes in the upper OMZs but to physical processes in the lower OMZs.
Jannes Koelling, Dariia Atamanchuk, Johannes Karstensen, Patricia Handmann, and Douglas W. R. Wallace
Biogeosciences, 19, 437–454, https://doi.org/10.5194/bg-19-437-2022, https://doi.org/10.5194/bg-19-437-2022, 2022
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In this study, we investigate oxygen variability in the deep western boundary current in the Labrador Sea from multiyear moored records. We estimate that about half of the oxygen taken up in the interior Labrador Sea by air–sea gas exchange during deep water formation is exported southward the same year. Our results underline the complexity of the oxygen uptake and export in the Labrador Sea and highlight the important role this region plays in supplying oxygen to the deep ocean.
Gerhard Fischer, Oscar E. Romero, Johannes Karstensen, Karl-Heinz Baumann, Nasrollah Moradi, Morten Iversen, Götz Ruhland, Marco Klann, and Arne Körtzinger
Biogeosciences, 18, 6479–6500, https://doi.org/10.5194/bg-18-6479-2021, https://doi.org/10.5194/bg-18-6479-2021, 2021
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Low-oxygen eddies in the eastern subtropical North Atlantic can form an oasis for phytoplankton growth. Here we report on particle flux dynamics at the oligotrophic Cape Verde Ocean Observatory. We observed consistent flux patterns during the passages of low-oxygen eddies. We found distinct flux peaks in late winter, clearly exceeding background fluxes. Our findings suggest that the low-oxygen eddies sequester higher organic carbon than expected for oligotrophic settings.
Cited articles
Argo, G.: Argo float data and metadata from global data assembly centre (Argo
GDAC), Seanoe [data set], https://doi.org/10.17882/42182, 2000. a, b, c
Bacon, S., Culkin, F., Higgs, N., and Ridout, P.: IAPSO Standard Seawater:
Definition of the Uncertainty in the Calibration Procedure, and Stability of
Recent Batches, J. Atmos. Ocean. Tech., 24, 1785– 1799, https://doi.org/10.1175/JTECH2081.1, 2007. a
Bailey, A., Aemisegger, F., Villiger, L., Los, S. A., Reverdin, G., Quiñones Meléndez, E., Acquistapace, C., Baranowski, D. B., Böck, T., Bony, S., Bordsdorff, T., Coffman, D., de Szoeke, S. P., Diekmann, C. J., Dütsch, M., Ertl, B., Galewsky, J., Henze, D., Makuch, P., Noone, D., Quinn, P. K., Rösch, M., Schneider, A., Schneider, M., Speich, S., Stevens, B., and Thompson, E. J.: Isotopic measurements in water vapor, precipitation, and seawater during EUREC4A, Earth Syst. Sci. Data, 15, 465–495, https://doi.org/10.5194/essd-15-465-2023, 2023. a
Bosser, P., Bock, O., Flamant, C., Bony, S., and Speich, S.: Integrated water vapour content retrievals from ship-borne GNSS receivers during EUREC4A, Earth Syst. Sci. Data, 13, 1499–1517, https://doi.org/10.5194/essd-13-1499-2021, 2021. a
Bourras, D., Branger, H., Reverdin, G., Marié, L., Cambra, R., Baggio, L.,
Caudoux, C., Caudal, G., Morisset, S., Geyskens, N., Weill, A., and Hauser,
D.: A New Platform for the Determination of Air–Sea Fluxes (OCARINA):
Overview and First Results, J. Atmos. Ocean. Tech.,
31, 1043–1062, https://doi.org/10.1175/JTECH-D-13-00055.1, 2014. a
Branellec, P., Le Bihan, C., and Speich, S.: EUREC4A 2020. CTD-O2 Data report, Ifremer,
https://doi.org/10.13155/79038, 2020. a, b, c
Eaton, B., Gregory, J., Drach, B., Taylor, K., Hankin, S., Caron, J., Signell,
R., Bentley, P., Rappa, G., Höck, H., Pamment, A., and Juckes, M.: NetCDF Climate and Forecast
(CF) metadata conventions,
http://cfconventions.org/cf-conventions/v1.6.0/cf-conventions.html (last access: 17 April 2023),
2003. a
Firing, E., Hummon, J. M., and Chereskin, T. K.: Improving the Quality and
Accessibility of Current Profile Measurements in the Southern Ocean,
Oceanography, 25, 164–165, https://doi.org/10.5670/oceanog.2012.91, 2012. a
Fratantoni, D. M. and Glickson, D. A.: North Brazil Current Ring Generation and
Evolution Observed with SeaWiFS, J. Phys. Oceanogr., 32, 1058–1074, https://doi.org/10.1175/1520-0485(2002)032<1058:NBCRGA>2.0.CO;2, 2002. a, b
Fratantoni, D. M. and Richardson, P. L.: The Evolution and Demise of North
Brazil Current Rings, J. Phys. Oceanogr., 36, 1241–1264,
https://doi.org/10.1175/JPO2907.1, 2006. a
Gentemann, C. L., Vazquez, J., and Tang, W.: 2020 Atomic Saildrone Cruise
Report, Zenodo, https://doi.org/10.5281/zenodo.5201863, 2020. a
Gouretski, V. and Jancke, K.: Systematic errors as the cause for an apparent
deep water property variability: global analysis of the WOCE and historical
hydrographic data, Prog. Oceanogr., 48, 337–402,
https://doi.org/10.1016/S0079-6611(00)00049-5, 2000. a
Hood, E., Sabine, C., and Sloyan, B.: The GO-SHIP repeat hydrography manual: A
collection of expert reports and guidelines, IOCCP Rep, 14,
https://doi.org/10.25607/OBP-1341, 2010. a
Johns, W. E., Zantopp, R. J., and Goni, G.: Cross-gyre transport by North
Brazil Current rings, in: Interhemispheric Water Exchange in the Atlantic
Ocean, edited by: Goni, G. and Malanotte-Rizzoli, P., vol. 68, Elsevier
Oceanography Series, 411–441,
https://doi.org/10.1016/S0422-9894(03)80156-3, 2003. a
Karstensen, J. and Krahmann, G.: Lowered ADCP data during Maria S. Merian
cruise MSM89, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.956063, 2023a. a, b
Karstensen, J. and Krahmann, G.: Physical oceanography (CTD) during Maria A.
Merian cruise MSM89, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.956057, 2023b. a, b
Karstensen, J. and Krahmann, G.: Moving vessel profiler data collected during
Maria S. Merian cruise MSM89, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.956141,
2023c. a, b
Karstensen, J. and Krahmann, G.: Underway CTD data collected during Maria S.
Merian cruise MSM89, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.956139, 2023d. a, b
Karstensen, J., Lavik, G., Kopp, A., Mehlmann, M., Boeck, T., Ribbe, J.,
Guettler, J., Nordsiek, F., Philippi, M., Bodenschatz, E., Böck, T., Güttler, J., Hall, K., Körner,
M., Kopp, A., Lange, D., Mehlmann, M., Nordsiek, F., Reus, K.,
Ribbe, J., Philippi, M., Piosek, S., Ritschel, M., Tschitschko, B., and
Wiskandt, J.: EUREC4A
Campaign, Cruise No. MSM89, 17 January–20 February 2020, Bridgetown
Barbados–Bridgetown Barbados, The ocean mesoscale component in the EUREC4A++
field study, MARIA S. MERIAN-Berichte, cruise report, Gutachterpanel Forschungsschiffe, https://doi.org/10.2312/cr_msm89, 2020. a, b, c, d, e
Karstensen, J., Krahmann, G., and Schlundt, M.: Continuous thermosalinograph
oceanography along RV MARIA S. MERIAN cruise track MSM89, PANGAEA [data set],
https://doi.org/10.1594/PANGAEA.951260, 2022. a
Larson, N. and Pedersen, A.: Temperature measurements in flowing water: Viscous
heating of sensor tips, in: Proc. of the First IGHEM Meeting, Montreal, QC,
Canada, International Group for Hydraulic Efficiency Measurement,
http://www.ighem.org/Paper1996/IGHEM1996_16.pdf (last access: 17 April 2023), 1996. a
Laxenaire, R., Speich, S., Blanke, B., Chaigneau, A., Pegliasco, C., and
Stegner, A.: Anticyclonic Eddies Connecting the Western Boundaries of Indian
and Atlantic Oceans, J. Geophys. Res.-Oceans, 123,
7651–7677, https://doi.org/10.1029/2018JC014270, 2018. a
Le Bot, P., Kermabon, C., Lherminier, P., and Gaillard, F.: CASCADE V6. 1:
Logiciel de validation et de visualisation des mesures ADCP de coque,
https://archimer.ifremer.fr/doc/00342/45285/ (last access: 17 April 2023), 2011. a
L'Hégaret, P., Speich, S., and Karstensen, J.: Concatenated Temperature,
Salinity, and Velocity measurements from EUREC4A-OA/ATOMIC (CTD, uCTD, MVP
and S-ADCP data from the R/Vs L'Atalante and Maria S. Merian), Seanoe [data set],
https://doi.org/10.17882/92071, 2020a. a, b, c
L'Hégaret, P., Speich, S., and Karstensen, J.: MVP Data 2nd QC-
EUREC4A-OA/ATOMIC, Seanoe [data set], https://doi.org/10.17882/91485, 2020b. a, b
L'Hégaret, P., Speich, S., and Karstensen, J.: uCTD Data 2nd QC-
EUREC4A-OA/ATOMIC, Seanoe [data set], https://doi.org/10.17882/91352, 2020c. a, b
Liblik, T., Karstensen, J., Testor, P., Alenius, P., Hayes, D., Ruiz, S.,
Heywood, K., Pouliquen, S., Mortier, L., and Mauri, E.: Potential for an
underwater glider component as part of the Global Ocean Observing System,
Methods in Oceanography, 17, 50–82,
https://doi.org/10.1016/j.mio.2016.05.001, 2016. a
Lueck, R. G.: Thermal Inertia of Conductivity Cells: Theory, J.
Atmos. Ocean. Tech., 7, 741–755,
https://doi.org/10.1175/1520-0426(1990)007<0741:TIOCCT>2.0.CO;2, 1990. a, b
Lueck, R. G. and Picklo, J. J.: Thermal Inertia of Conductivity Cells:
Observations with a Sea-Bird Cell, J. Atmos. Ocean.
Tech., 7, 756–768,
https://doi.org/10.1175/1520-0426(1990)007<0756:TIOCCO>2.0.CO;2, 1990. a
Mensah, V., Roquet, F., Siegelman-Charbit, L., Picard, B., Pauthenet, E., and
Guinet, C.: A Correction for the Thermal Mass–Induced Errors of CTD Tags
Mounted on Marine Mammals, J. Atmos. Ocean. Tech., 35,
1237–1252, https://doi.org/10.1175/JTECH-D-17-0141.1, 2018. a
Mohr, W., Kinne, S., Baier, K., Baranowski, D., Chilinski, M., Gollop, J.,
De Groot, G., Grosz, R., Helfer, K., Ibáñez-Landeta, A., Kalesse, H.,
Kidane, A., Los, S., Makuch, P., Meyer, M., Morfa-Avalos, Y., Neuberger, A.,
Nowak, J., Raeke, A., Rollo, C., Röttenbacher, J., Sandiford, S.,
Schirmacher, I., Schlenczek, O., Schröder, M., Siddle, E., Szkolka, W.,
Ubele, A. A., Von Arx, J., and Worbes, L.: EUREC4A Campaign, Cruise No. M161,
17 January 2020–3 March 2020, Bridgetown (Barbados) – Ponta Delgada (Portugal),
https://doi.org/10.2312/CR_M161, 2020. a, b
Mohr, W., Kinne, S., and Schlundt, M.: Continuous thermosalinograph oceanography along RV METEOR cruise track M161, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.951515, 2022. a, b
Otosaka, S., Ueki, I., Sasano, D., Kumamoto, Y., Obata, H., Fukuda, H.,
Nishibe, Y., Maki, H., Goto, K., Ono, T., and Aoyama, M.: Guideline of ocean
observations, Volumes 1–10,
https://kaiyo-gakkai.jp/jos/en/guide/download (last access: 17 April 2023), 2020. a
Perkin, R., and Lewis, E.: Design of CTD observational programmes in
relation to sensor time constants and sampling frequencies, report, Canadian Technical Report of Hydrography and Ocean Sciences,
No. 7, 47 pp., 1982. a
Quinn, P. K., Thompson, E. J., Coffman, D. J., Baidar, S., Bariteau, L., Bates, T. S., Bigorre, S., Brewer, A., de Boer, G., de Szoeke, S. P., Drushka, K., Foltz, G. R., Intrieri, J., Iyer, S., Fairall, C. W., Gaston, C. J., Jansen, F., Johnson, J. E., Krüger, O. O., Marchbanks, R. D., Moran, K. P., Noone, D., Pezoa, S., Pincus, R., Plueddemann, A. J., Pöhlker, M. L., Pöschl, U., Quinones Melendez, E., Royer, H. M., Szczodrak, M., Thomson, J., Upchurch, L. M., Zhang, C., Zhang, D., and Zuidema, P.: Measurements from the RV Ronald H. Brown and related platforms as part of the Atlantic Tradewind Ocean-Atmosphere Mesoscale Interaction Campaign (ATOMIC), Earth Syst. Sci. Data, 13, 1759–1790, https://doi.org/10.5194/essd-13-1759-2021, 2021. a, b
Reverdin, G., Olivier, L., Foltz, G. R., Speich, S., Karstensen, J., Horstmann,
J., Zhang, D., Laxenaire, R., Carton, X., Branger, H., Carrasco, R., and
Boutin, J.: Formation and Evolution of a Freshwater Plume in the Northwestern
Tropical Atlantic in February 2020, J. Geophys. Res.-Oceans,
126, e2020JC016981, https://doi.org/10.1029/2020JC016981, 2021. a
Rollo, C.: Physical and biogeochemical data from three Seagliders on a
combination transect and virtual mooring deployment, NE of Barbados January–February 2020, National Oceanography Centre [data set], https://doi.org/10.5285/c596cdd7-c709-461a-e053-6c86abc0c127, 2021. a, b
Rudnick, D. L. and Klinke, J.: The Underway Conductivity–Temperature–Depth
Instrument, J. Atmos. Ocean. Tech., 24, 1910–1923,
https://doi.org/10.1175/JTECH2100.1, 2007. a
Saildrone: Saildrone field campaign surface and ADCP measurements for the
Atlantic Tradewind Ocean-Atmosphere Mesoscale Interaction Campaign (ATOMIC)
project, PODAAC [data set], https://doi.org/10.5067/SDRON-ATOM0, 2020. a, b
Sloyan, B. M., Wanninkhof, R., Kramp, M., Johnson, G. C., Talley, L. D.,
Tanhua, T., McDonagh, E., Cusack, C., O’Rourke, E., McGovern, E.,
Katsumata, K., Diggs, S., Hummon, J., Ishii, M., Azetsu-Scott, K., Boss, E.,
Ansorge, I., Perez, F. F., Mercier, H., Williams, M. J. M., Anderson, L.,
Lee, J. H., Murata, A., Kouketsu, S., Jeansson, E., Hoppema, M., and Campos,
E.: The Global Ocean Ship-Based Hydrographic Investigations Program
(GO-SHIP): A Platform for Integrated Multidisciplinary Ocean Science,
Frontiers in Marine Science, 6, 445, https://doi.org/10.3389/fmars.2019.00445, 2019. a, b, c
Speich, S., Carton, X., Reverdin, G., Branellec, P., Le Bihan, C., Laxenaire,
R., L'Hegaret, P., Leizour, S., Le Bot, P., Noisel, C., Manta, G., Meroni,
A., Napoli, A., Chen, Y., Masson, S., Le Gal, A., and Olivier, L.: CTD DATA –
EUREC4A OA Atalante Cruise, Seanoe [data set], https://doi.org/10.17882/79096, 2021a. a, b
Speich, S., Carton, X., Labaste, M., Le Bot,
P., Leizour, S., L'Hégaret, P., Masson, S., Meroni, A., Le Gal,
A., Napoli, A., Manta, G., Chen, Y., Guirand, I., Subirade, C.,
Demange, J., Branellec, P., Le Bihan, C., Olivier, L., Laxenaire, R., Tarot,
S., Person, R., Geykens, N., Sadoulet, P., Dahout, T., Wright,
E., Branger, H., Luneau, C., Losi, N., and Fauvin, O.: EUREC4A-OA. Cruise Report. 19 January–19 February 2020.
Vessel: L’ATALANTE, FOF, Flotte Océanographique Française, https://doi.org/10.13155/80129,
2021b. a, b, c, d, e
Stephan, C. C., Schnitt, S., Schulz, H., Bellenger, H., de Szoeke, S. P., Acquistapace, C., Baier, K., Dauhut, T., Laxenaire, R., Morfa-Avalos, Y., Person, R., Quiñones Meléndez, E., Bagheri, G., Böck, T., Daley, A., Güttler, J., Helfer, K. C., Los, S. A., Neuberger, A., Röttenbacher, J., Raeke, A., Ringel, M., Ritschel, M., Sadoulet, P., Schirmacher, I., Stolla, M. K., Wright, E., Charpentier, B., Doerenbecher, A., Wilson, R., Jansen, F., Kinne, S., Reverdin, G., Speich, S., Bony, S., and Stevens, B.: Ship- and island-based atmospheric soundings from the 2020 EUREC4A field campaign, Earth Syst. Sci. Data, 13, 491–514, https://doi.org/10.5194/essd-13-491-2021, 2021. a
Stevens, B., Bony, S., Farrell, D., Ament, F., Blyth, A., Fairall, C., Karstensen, J., Quinn, P. K., Speich, S., Acquistapace, C., Aemisegger, F., Albright, A. L., Bellenger, H., Bodenschatz, E., Caesar, K.-A., Chewitt-Lucas, R., de Boer, G., Delanoë, J., Denby, L., Ewald, F., Fildier, B., Forde, M., George, G., Gross, S., Hagen, M., Hausold, A., Heywood, K. J., Hirsch, L., Jacob, M., Jansen, F., Kinne, S., Klocke, D., Kölling, T., Konow, H., Lothon, M., Mohr, W., Naumann, A. K., Nuijens, L., Olivier, L., Pincus, R., Pöhlker, M., Reverdin, G., Roberts, G., Schnitt, S., Schulz, H., Siebesma, A. P., Stephan, C. C., Sullivan, P., Touzé-Peiffer, L., Vial, J., Vogel, R., Zuidema, P., Alexander, N., Alves, L., Arixi, S., Asmath, H., Bagheri, G., Baier, K., Bailey, A., Baranowski, D., Baron, A., Barrau, S., Barrett, P. A., Batier, F., Behrendt, A., Bendinger, A., Beucher, F., Bigorre, S., Blades, E., Blossey, P., Bock, O., Böing, S., Bosser, P., Bourras, D., Bouruet-Aubertot, P., Bower, K., Branellec, P., Branger, H., Brennek, M., Brewer, A., Brilouet, P.-E., Brügmann, B., Buehler, S. A., Burke, E., Burton, R., Calmer, R., Canonici, J.-C., Carton, X., Cato Jr., G., Charles, J. A., Chazette, P., Chen, Y., Chilinski, M. T., Choularton, T., Chuang, P., Clarke, S., Coe, H., Cornet, C., Coutris, P., Couvreux, F., Crewell, S., Cronin, T., Cui, Z., Cuypers, Y., Daley, A., Damerell, G. M., Dauhut, T., Deneke, H., Desbios, J.-P., Dörner, S., Donner, S., Douet, V., Drushka, K., Dütsch, M., Ehrlich, A., Emanuel, K., Emmanouilidis, A., Etienne, J.-C., Etienne-Leblanc, S., Faure, G., Feingold, G., Ferrero, L., Fix, A., Flamant, C., Flatau, P. J., Foltz, G. R., Forster, L., Furtuna, I., Gadian, A., Galewsky, J., Gallagher, M., Gallimore, P., Gaston, C., Gentemann, C., Geyskens, N., Giez, A., Gollop, J., Gouirand, I., Gourbeyre, C., de Graaf, D., de Groot, G. E., Grosz, R., Güttler, J., Gutleben, M., Hall, K., Harris, G., Helfer, K. C., Henze, D., Herbert, C., Holanda, B., Ibanez-Landeta, A., Intrieri, J., Iyer, S., Julien, F., Kalesse, H., Kazil, J., Kellman, A., Kidane, A. T., Kirchner, U., Klingebiel, M., Körner, M., Kremper, L. A., Kretzschmar, J., Krüger, O., Kumala, W., Kurz, A., L'Hégaret, P., Labaste, M., Lachlan-Cope, T., Laing, A., Landschützer, P., Lang, T., Lange, D., Lange, I., Laplace, C., Lavik, G., Laxenaire, R., Le Bihan, C., Leandro, M., Lefevre, N., Lena, M., Lenschow, D., Li, Q., Lloyd, G., Los, S., Losi, N., Lovell, O., Luneau, C., Makuch, P., Malinowski, S., Manta, G., Marinou, E., Marsden, N., Masson, S., Maury, N., Mayer, B., Mayers-Als, M., Mazel, C., McGeary, W., McWilliams, J. C., Mech, M., Mehlmann, M., Meroni, A. N., Mieslinger, T., Minikin, A., Minnett, P., Möller, G., Morfa Avalos, Y., Muller, C., Musat, I., Napoli, A., Neuberger, A., Noisel, C., Noone, D., Nordsiek, F., Nowak, J. L., Oswald, L., Parker, D. J., Peck, C., Person, R., Philippi, M., Plueddemann, A., Pöhlker, C., Pörtge, V., Pöschl, U., Pologne, L., Posyniak, M., Prange, M., Quiñones Meléndez, E., Radtke, J., Ramage, K., Reimann, J., Renault, L., Reus, K., Reyes, A., Ribbe, J., Ringel, M., Ritschel, M., Rocha, C. B., Rochetin, N., Röttenbacher, J., Rollo, C., Royer, H., Sadoulet, P., Saffin, L., Sandiford, S., Sandu, I., Schäfer, M., Schemann, V., Schirmacher, I., Schlenczek, O., Schmidt, J., Schröder, M., Schwarzenboeck, A., Sealy, A., Senff, C. J., Serikov, I., Shohan, S., Siddle, E., Smirnov, A., Späth, F., Spooner, B., Stolla, M. K., Szkółka, W., de Szoeke, S. P., Tarot, S., Tetoni, E., Thompson, E., Thomson, J., Tomassini, L., Totems, J., Ubele, A. A., Villiger, L., von Arx, J., Wagner, T., Walther, A., Webber, B., Wendisch, M., Whitehall, S., Wiltshire, A., Wing, A. A., Wirth, M., Wiskandt, J., Wolf, K., Worbes, L., Wright, E., Wulfmeyer, V., Young, S., Zhang, C., Zhang, D., Ziemen, F., Zinner, T., and Zöger, M.: EUREC4A, Earth Syst. Sci. Data, 13, 4067–4119, https://doi.org/10.5194/essd-13-4067-2021, 2021 (data available at: https://observations.ipsl.fr/aeris/eurec4a/#/, last access: 17 April 2023). a, b, c, d, e, f, g, h
Tanhua, T., van Heuven, S., Key, R. M., Velo, A., Olsen, A., and Schirnick, C.: Quality control procedures and methods of the CARINA database, Earth Syst. Sci. Data, 2, 35–49, https://doi.org/10.5194/essd-2-35-2010, 2010.
a
Thurnherr, A., Visbeck, M., Firing, E., King, B., Hummon, J., Krahmann, G., and
Huber, B.: A manual for acquiring lowered Doppler current profiler data, The
GO-SHIP Repeat Hydrography Manual: A Collection of Expert Reports and
Guidelines, IOCCP Report Number 14, ICPO Publication Series Number 134, 21 pp., https://doi.org/10.25607/OBP-1345, 2010. a
Ullman, D. S. and Hebert, D.: Processing of Underway CTD Data, J.
Atmos. Ocean. Tech., 31, 984–998,
https://doi.org/10.1175/JTECH-D-13-00200.1, 2014. a, b, c
Winkler, L. W.: The determination of dissolved oxygen in water, Berlin DeutChem
Gas, 21, 2843–2855, 1888. a
Wong, A. P. S., Johnson, G. C., and Owens, W. B.: Delayed-Mode Calibration of
Autonomous CTD Profiling Float Salinity Data by θ–S Climatology, J. Atmos. Ocean. Tech., 20, 308–318,
https://doi.org/10.1175/1520-0426(2003)020<0308:DMCOAC>2.0.CO;2,
2003. a
Short summary
In early 2020, the EUREC4A-OA/ATOMIC experiment took place in the northwestern Tropical Atlantic Ocean, a dynamical region where different water masses interact. Four oceanographic vessels and a fleet of autonomous devices were deployed to study the processes at play and sample the upper ocean, each with its own observing capability. The article first describes the data calibration and validation and second their cross-validation, using a hierarchy of instruments and estimating the uncertainty.
In early 2020, the EUREC4A-OA/ATOMIC experiment took place in the northwestern Tropical Atlantic...
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