Articles | Volume 21, issue 4
https://doi.org/10.5194/os-21-1223-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/os-21-1223-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
04 Jul 2025
Research article |
| 04 Jul 2025
| 04 Jul 2025
Critical uncoupling between biogeochemical stocks and rates in Ross Sea springtime production–export dynamics
Meredith G. Meyer
CORRESPONDING AUTHOR
Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, UK
Virginia Institute of Marine Science, William & Mary, Gloucester Point, VA, USA
Esther Portela
Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, UK
Laboratoire d'Océanographie Physique et Spatiale, University of Brest, CNRS, IRD, Ifremer, Plouzané, France
Walker O. Smith Jr.
Virginia Institute of Marine Science, William & Mary, Gloucester Point, VA, USA
School of Oceanography, Shanghai Jiao Tong University, Shanghai, China
Karen J. Heywood
Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, UK
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Daisy Drew Pickup, Dorothee C. E. Bakker, Karen J. Heywood, Francis Glassup, Emily Hammermeister, Sharon E. Stammerjohn, Gareth A. Lee, Socratis Loucaides, Bastien Y. Queste, Benjamin G. M. Webber, and Patricia L. Yager
EGUsphere, https://doi.org/10.5194/egusphere-2025-2441, https://doi.org/10.5194/egusphere-2025-2441, 2025
This preprint is open for discussion and under review for Ocean Science (OS).
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Autonomous platforms in the Amundsen Sea have allowed for detection of isolated water masses that are colder, saltier and denser than overlying water. They are also associated with a higher dissolved inorganic carbon concentration and lower pH. The water masses, referred to as lenses, could have implications for the transfer of heat and storage of carbon in the region. We hypothesise that they form in surrounding areas that experience intense cooling and sea ice formation in autumn/winter.
Angel Ruiz-Angulo, Esther Portela, Charly de Marez, Andreas Macrander, Sólveig Rósa Ólafsdóttir, Thomas Meunier, Steingrímur Jónsson, and M. Dolores Pérez-Hernández
EGUsphere, https://doi.org/10.5194/egusphere-2025-2102, https://doi.org/10.5194/egusphere-2025-2102, 2025
This preprint is open for discussion and under review for Ocean Science (OS).
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The ocean around Iceland is a key region for water mass transformation that drives global ocean circulation. We use 29 years of hydrographic data to examine the spatial and temporal variability of mixed layer depth and stratification, identifying three distinct regions: South, North, and Northeast. We present a comprehensive view of seasonal to multi-decadal variability in upper ocean structure and its link to a changing North Atlantic under global warming.
Maren Elisabeth Richter, Karen J. Heywood, and Rob A. Hall
EGUsphere, https://doi.org/10.5194/egusphere-2025-1994, https://doi.org/10.5194/egusphere-2025-1994, 2025
This preprint is open for discussion and under review for Ocean Science (OS).
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Warm ocean water causes rapid melting of Antarctic glaciers. The circulation and mixing of warm water in ice shelf cavities is mostly unknown. We observed ocean currents and mixing under Dotson Ice Shelf. Mixing is low, with patches of higher mixing associated with stronger currents and vertical current shear. The levels of turbulent mixing will lead to negligible heat loss during the path of the warm water to the grounding line, leaving plenty of heat available to melt the ice shelf there.
Christian T. Wild, Tasha Snow, Tiago S. Dotto, Peter E. D. Davis, Scott Tyler, Ted A. Scambos, Erin C. Pettit, and Karen J. Heywood
EGUsphere, https://doi.org/10.5194/egusphere-2025-1675, https://doi.org/10.5194/egusphere-2025-1675, 2025
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Thwaites Glacier is retreating due to warm ocean water melting it from below, but its thick ice shelf makes this heat hard to monitor. Using hot water drilling, we placed sensors beneath the floating ice, revealing how surface freezing in Pine Island Bay influences heat at depth. Alongside gradual warming, we found bursts of heat that could speed up melting at the grounding zone, which may become more common as sea ice declines.
Shenjie Zhou, Pierre Dutrieux, Claudia F. Giulivi, Adrian Jenkins, Alessandro Silvano, Christopher Auckland, E. Povl Abrahamsen, Michael P. Meredith, Irena Vaňková, Keith W. Nicholls, Peter E. D. Davis, Svein Østerhus, Arnold L. Gordon, Christopher J. Zappa, Tiago S. Dotto, Theodore A. Scambos, Kathyrn L. Gunn, Stephen R. Rintoul, Shigeru Aoki, Craig Stevens, Chengyan Liu, Sukyoung Yun, Tae-Wan Kim, Won Sang Lee, Markus Janout, Tore Hattermann, Julius Lauber, Elin Darelius, Anna Wåhlin, Leo Middleton, Pasquale Castagno, Giorgio Budillon, Karen J. Heywood, Jennifer Graham, Stephen Dye, Daisuke Hirano, and Una Kim Miller
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2025-54, https://doi.org/10.5194/essd-2025-54, 2025
Preprint under review for ESSD
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We created the first standardised dataset of in-situ ocean measurements time series from around Antarctica collected since 1970s. This includes temperature, salinity, pressure, and currents recorded by instruments deployed in icy, challenging conditions. Our analysis highlights the dominance of tidal currents and separates these from other patterns to study regional energy distribution. This unique dataset offers a foundation for future research on Antarctic ocean dynamics and ice interactions.
Nicolas Kolodziejczyk, Esther Portela, Virginie Thierry, and Annaig Prigent
Earth Syst. Sci. Data, 16, 5191–5206, https://doi.org/10.5194/essd-16-5191-2024, https://doi.org/10.5194/essd-16-5191-2024, 2024
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Oceanic dissolved oxygen (DO) is fundamental for ocean biogeochemical cycles and marine life. To ease the computation of the ocean oxygen budget from in situ DO data, mapping of data on a regular 3D grid is useful. Here, we present a new DO gridded product from the Argo database. We compare it with existing DO mapping from a historical dataset. We suggest that the ocean has generally been losing oxygen since the 1980s, but large interannual and regional variabilities should be considered.
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.
Emmanuel Romero, Leonardo Tenorio-Fernandez, Esther Portela, Jorge Montes-Aréchiga, and Laura Sánchez-Velasco
Ocean Sci., 19, 887–901, https://doi.org/10.5194/os-19-887-2023, https://doi.org/10.5194/os-19-887-2023, 2023
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In this study, we present a methodology to locate the minimum and maximum depths of the strongest thermocline, its thickness, and its strength by adjusting the sigmoid function to the temperature profiles in the global ocean. The results of the methodology are compared with the results of other methods found in the literature, and an assessment of the ocean regions where the adjustment is valid is provided. The method proposed here has shown to be robust and easy to apply.
Pierre L'Hégaret, Florian Schütte, Sabrina Speich, Gilles Reverdin, Dariusz B. Baranowski, Rena Czeschel, Tim Fischer, Gregory R. Foltz, Karen J. Heywood, Gerd Krahmann, Rémi Laxenaire, Caroline Le Bihan, Philippe Le Bot, Stéphane Leizour, Callum Rollo, Michael Schlundt, Elizabeth Siddle, Corentin Subirade, Dongxiao Zhang, and Johannes Karstensen
Earth Syst. Sci. Data, 15, 1801–1830, https://doi.org/10.5194/essd-15-1801-2023, https://doi.org/10.5194/essd-15-1801-2023, 2023
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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.
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.
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.
Walker O. Smith Jr.
Earth Syst. Sci. Data, 14, 2737–2747, https://doi.org/10.5194/essd-14-2737-2022, https://doi.org/10.5194/essd-14-2737-2022, 2022
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The rate of photosynthesis of marine phytoplankton – primary productivity – is typically measured by quantifying the rate of radioisotope incorporation. However, generally such measurements are not collected by one individual through time and so are difficult to compare due to methodological differences. A data set compiled by one investigator over more than 20 years in the Ross Sea demonstrates the importance of the region as a "hot spot" for growth and synthesis.
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.
Bjorn Stevens, Sandrine Bony, David Farrell, Felix Ament, Alan Blyth, Christopher Fairall, Johannes Karstensen, Patricia K. Quinn, Sabrina Speich, Claudia Acquistapace, Franziska Aemisegger, Anna Lea Albright, Hugo Bellenger, Eberhard Bodenschatz, Kathy-Ann Caesar, Rebecca Chewitt-Lucas, Gijs de Boer, Julien Delanoë, Leif Denby, Florian Ewald, Benjamin Fildier, Marvin Forde, Geet George, Silke Gross, Martin Hagen, Andrea Hausold, Karen J. Heywood, Lutz Hirsch, Marek Jacob, Friedhelm Jansen, Stefan Kinne, Daniel Klocke, Tobias Kölling, Heike Konow, Marie Lothon, Wiebke Mohr, Ann Kristin Naumann, Louise Nuijens, Léa Olivier, Robert Pincus, Mira Pöhlker, Gilles Reverdin, Gregory Roberts, Sabrina Schnitt, Hauke Schulz, A. Pier Siebesma, Claudia Christine Stephan, Peter Sullivan, Ludovic Touzé-Peiffer, Jessica Vial, Raphaela Vogel, Paquita Zuidema, Nicola Alexander, Lyndon Alves, Sophian Arixi, Hamish Asmath, Gholamhossein Bagheri, Katharina Baier, Adriana Bailey, Dariusz Baranowski, Alexandre Baron, Sébastien Barrau, Paul A. Barrett, Frédéric Batier, Andreas Behrendt, Arne Bendinger, Florent Beucher, Sebastien Bigorre, Edmund Blades, Peter Blossey, Olivier Bock, Steven Böing, Pierre Bosser, Denis Bourras, Pascale Bouruet-Aubertot, Keith Bower, Pierre Branellec, Hubert Branger, Michal Brennek, Alan Brewer, Pierre-Etienne Brilouet, Björn Brügmann, Stefan A. Buehler, Elmo Burke, Ralph Burton, Radiance Calmer, Jean-Christophe Canonici, Xavier Carton, Gregory Cato Jr., Jude Andre Charles, Patrick Chazette, Yanxu Chen, Michal T. Chilinski, Thomas Choularton, Patrick Chuang, Shamal Clarke, Hugh Coe, Céline Cornet, Pierre Coutris, Fleur Couvreux, Susanne Crewell, Timothy Cronin, Zhiqiang Cui, Yannis Cuypers, Alton Daley, Gillian M. Damerell, Thibaut Dauhut, Hartwig Deneke, Jean-Philippe Desbios, Steffen Dörner, Sebastian Donner, Vincent Douet, Kyla Drushka, Marina Dütsch, André Ehrlich, Kerry Emanuel, Alexandros Emmanouilidis, Jean-Claude Etienne, Sheryl Etienne-Leblanc, Ghislain Faure, Graham Feingold, Luca Ferrero, Andreas Fix, Cyrille Flamant, Piotr Jacek Flatau, Gregory R. Foltz, Linda Forster, Iulian Furtuna, Alan Gadian, Joseph Galewsky, Martin Gallagher, Peter Gallimore, Cassandra Gaston, Chelle Gentemann, Nicolas Geyskens, Andreas Giez, John Gollop, Isabelle Gouirand, Christophe Gourbeyre, Dörte de Graaf, Geiske E. de Groot, Robert Grosz, Johannes Güttler, Manuel Gutleben, Kashawn Hall, George Harris, Kevin C. Helfer, Dean Henze, Calvert Herbert, Bruna Holanda, Antonio Ibanez-Landeta, Janet Intrieri, Suneil Iyer, Fabrice Julien, Heike Kalesse, Jan Kazil, Alexander Kellman, Abiel T. Kidane, Ulrike Kirchner, Marcus Klingebiel, Mareike Körner, Leslie Ann Kremper, Jan Kretzschmar, Ovid Krüger, Wojciech Kumala, Armin Kurz, Pierre L'Hégaret, Matthieu Labaste, Tom Lachlan-Cope, Arlene Laing, Peter Landschützer, Theresa Lang, Diego Lange, Ingo Lange, Clément Laplace, Gauke Lavik, Rémi Laxenaire, Caroline Le Bihan, Mason Leandro, Nathalie Lefevre, Marius Lena, Donald Lenschow, Qiang Li, Gary Lloyd, Sebastian Los, Niccolò Losi, Oscar Lovell, Christopher Luneau, Przemyslaw Makuch, Szymon Malinowski, Gaston Manta, Eleni Marinou, Nicholas Marsden, Sebastien Masson, Nicolas Maury, Bernhard Mayer, Margarette Mayers-Als, Christophe Mazel, Wayne McGeary, James C. McWilliams, Mario Mech, Melina Mehlmann, Agostino Niyonkuru Meroni, Theresa Mieslinger, Andreas Minikin, Peter Minnett, Gregor Möller, Yanmichel Morfa Avalos, Caroline Muller, Ionela Musat, Anna Napoli, Almuth Neuberger, Christophe Noisel, David Noone, Freja Nordsiek, Jakub L. Nowak, Lothar Oswald, Douglas J. Parker, Carolyn Peck, Renaud Person, Miriam Philippi, Albert Plueddemann, Christopher Pöhlker, Veronika Pörtge, Ulrich Pöschl, Lawrence Pologne, Michał Posyniak, Marc Prange, Estefanía Quiñones Meléndez, Jule Radtke, Karim Ramage, Jens Reimann, Lionel Renault, Klaus Reus, Ashford Reyes, Joachim Ribbe, Maximilian Ringel, Markus Ritschel, Cesar B. Rocha, Nicolas Rochetin, Johannes Röttenbacher, Callum Rollo, Haley Royer, Pauline Sadoulet, Leo Saffin, Sanola Sandiford, Irina Sandu, Michael Schäfer, Vera Schemann, Imke Schirmacher, Oliver Schlenczek, Jerome Schmidt, Marcel Schröder, Alfons Schwarzenboeck, Andrea Sealy, Christoph J. Senff, Ilya Serikov, Samkeyat Shohan, Elizabeth Siddle, Alexander Smirnov, Florian Späth, Branden Spooner, M. Katharina Stolla, Wojciech Szkółka, Simon P. de Szoeke, Stéphane Tarot, Eleni Tetoni, Elizabeth Thompson, Jim Thomson, Lorenzo Tomassini, Julien Totems, Alma Anna Ubele, Leonie Villiger, Jan von Arx, Thomas Wagner, Andi Walther, Ben Webber, Manfred Wendisch, Shanice Whitehall, Anton Wiltshire, Allison A. Wing, Martin Wirth, Jonathan Wiskandt, Kevin Wolf, Ludwig Worbes, Ethan Wright, Volker Wulfmeyer, Shanea Young, Chidong Zhang, Dongxiao Zhang, Florian Ziemen, Tobias Zinner, and Martin Zöger
Earth Syst. Sci. Data, 13, 4067–4119, https://doi.org/10.5194/essd-13-4067-2021, https://doi.org/10.5194/essd-13-4067-2021, 2021
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The EUREC4A field campaign, designed to test hypothesized mechanisms by which clouds respond to warming and benchmark next-generation Earth-system models, is presented. EUREC4A comprised roughly 5 weeks of measurements in the downstream winter trades of the North Atlantic – eastward and southeastward of Barbados. It was the first campaign that attempted to characterize the full range of processes and scales influencing trade wind clouds.
Jack Giddings, Karen J. Heywood, Adrian J. Matthews, Manoj M. Joshi, Benjamin G. M. Webber, Alejandra Sanchez-Franks, Brian A. King, and Puthenveettil N. Vinayachandran
Ocean Sci., 17, 871–890, https://doi.org/10.5194/os-17-871-2021, https://doi.org/10.5194/os-17-871-2021, 2021
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Little is known about the impact of chlorophyll on SST in the Bay of Bengal (BoB). Solar irradiance measured by an ocean glider and three Argo floats is used to determine the effect of chlorophyll on BoB SST during the 2016 summer monsoon. The Southwest Monsoon Current has high chlorophyll concentrations (∼0.5 mg m−3) and shallow solar penetration depths (∼14 m). Ocean mixed layer model simulations show that SST increases by 0.35°C per month, with the potential to influence monsoon rainfall.
Jack Giddings, Adrian J. Matthews, Nicholas P. Klingaman, Karen J. Heywood, Manoj Joshi, and Benjamin G. M. Webber
Weather Clim. Dynam., 1, 635–655, https://doi.org/10.5194/wcd-1-635-2020, https://doi.org/10.5194/wcd-1-635-2020, 2020
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The impact of chlorophyll on the southwest monsoon is unknown. Here, seasonally varying chlorophyll in the Bay of Bengal was imposed in a general circulation model coupled to an ocean mixed layer model. The SST increases by 0.5 °C in response to chlorophyll forcing and shallow mixed layer depths in coastal regions during the inter-monsoon. Precipitation increases significantly to 3 mm d-1 across Myanmar during June and over northeast India and Bangladesh during October, decreasing model bias.
Reiner Onken, Heinz-Volker Fiekas, Laurent Beguery, Ines Borrione, Andreas Funk, Michael Hemming, Jaime Hernandez-Lasheras, Karen J. Heywood, Jan Kaiser, Michaela Knoll, Baptiste Mourre, Paolo Oddo, Pierre-Marie Poulain, Bastien Y. Queste, Aniello Russo, Kiminori Shitashima, Martin Siderius, and Elizabeth Thorp Küsel
Ocean Sci., 14, 321–335, https://doi.org/10.5194/os-14-321-2018, https://doi.org/10.5194/os-14-321-2018, 2018
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In June 2014, high-resolution oceanographic data were collected in the
western Mediterranean Sea by two research vessels, 11 gliders, moored
instruments, drifters, and one profiling float. The objective
of this article is to provide an overview of the data set which
is utilised by various ongoing studies, focusing on (i) water masses and circulation, (ii) operational forecasting, (iii) data assimilation, (iv) variability of the ocean, and (v) new payloads
for gliders.
Peter M. F. Sheehan, Barbara Berx, Alejandro Gallego, Rob A. Hall, Karen J. Heywood, Sarah L. Hughes, and Bastien Y. Queste
Ocean Sci., 14, 225–236, https://doi.org/10.5194/os-14-225-2018, https://doi.org/10.5194/os-14-225-2018, 2018
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We calculate tidal velocities using observations of ocean currents collected by an underwater glider. We use these velocities to investigate the location of sharp boundaries between water masses in shallow seas. Narrow currents along these boundaries are important transport pathways around shallow seas for pollutants and organisms. Tides are an important control on boundary location in summer, but seawater salt concentration can also influence boundary location, especially in winter.
Daniel E. Kaufman, Marjorie A. M. Friedrichs, John C. P. Hemmings, and Walker O. Smith Jr.
Biogeosciences, 15, 73–90, https://doi.org/10.5194/bg-15-73-2018, https://doi.org/10.5194/bg-15-73-2018, 2018
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Computer simulations of the highly variable phytoplankton in the Ross Sea demonstrated how incorporating data from different sources (satellite, ship, or glider) results in different system interpretations. For example, simulations assimilating satellite-based data produced lower carbon export estimates. Combining observations with models in this remote, harsh, and biologically variable environment should include consideration of the potential impacts of data frequency, duration, and coverage.
Michael P. Hemming, Jan Kaiser, Karen J. Heywood, Dorothee C.E. Bakker, Jacqueline Boutin, Kiminori Shitashima, Gareth Lee, Oliver Legge, and Reiner Onken
Ocean Sci., 13, 427–442, https://doi.org/10.5194/os-13-427-2017, https://doi.org/10.5194/os-13-427-2017, 2017
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Underwater gliders are useful platforms for monitoring the world oceans at a high resolution. An experimental pH sensor was attached to an underwater glider in the Mediterranean Sea, which is an important carbon sink region. Comparing measurements from the glider with those obtained from a ship indicated that there were issues with the experimental pH sensor. Correcting for these issues enabled us to look at pH variability in the area related to biomass abundance and physical water properties.
Imke Grefe, Sophie Fielding, Karen J. Heywood, and Jan Kaiser
Biogeosciences Discuss., https://doi.org/10.5194/bg-2017-73, https://doi.org/10.5194/bg-2017-73, 2017
Revised manuscript not accepted
Bastien Y. Queste, Liam Fernand, Timothy D. Jickells, Karen J. Heywood, and Andrew J. Hind
Biogeosciences, 13, 1209–1222, https://doi.org/10.5194/bg-13-1209-2016, https://doi.org/10.5194/bg-13-1209-2016, 2016
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In stratified shelf seas, physical and biological conditions can lead to seasonal oxygen depletion when consumption exceeds supply. An ocean glider obtained a high-resolution 3-day data set of biochemical and physical properties in the central North Sea. The data revealed very high oxygen consumption rates, far exceeding previously reported rates. A consumption–supply oxygen budget indicates a localized or short-lived resuspension event causing rapid remineralization of benthic organic matter.
C. Heuzé, J. K. Ridley, D. Calvert, D. P. Stevens, and K. J. Heywood
Geosci. Model Dev., 8, 3119–3130, https://doi.org/10.5194/gmd-8-3119-2015, https://doi.org/10.5194/gmd-8-3119-2015, 2015
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Most ocean models, including NEMO, have unrealistic Southern Ocean deep convection. That is, through extensive areas of the Southern Ocean, they exhibit convection from the surface of the ocean to the sea floor. We find this convection to be an issue as it impacts the whole ocean circulation, notably strengthening the Antarctic Circumpolar Current. Using sensitivity experiments, we show that counter-intuitively the vertical mixing needs to be enhanced to reduce this spurious convection.
W. O. Smith Jr. and K. Donaldson
Biogeosciences, 12, 3567–3577, https://doi.org/10.5194/bg-12-3567-2015, https://doi.org/10.5194/bg-12-3567-2015, 2015
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A compilation of photosynthesis-irradiance measurements from the Ross Sea, Antarctica, was analyzed for spatial and temporal trends, as well as the oceanographic factors that control the responses. The maximum, chlorophyll-specific, irradiance-saturated rate averaged 1.07+/-0.060 ug C per ug Chl per hour. Spring rates were 59% greater than summer rates. Irradiance, CO2, and iron had significant effects on rates. The effects of time need to be incorporated into models of Antarctic production.
J. Peloquin, C. Swan, N. Gruber, M. Vogt, H. Claustre, J. Ras, J. Uitz, R. Barlow, M. Behrenfeld, R. Bidigare, H. Dierssen, G. Ditullio, E. Fernandez, C. Gallienne, S. Gibb, R. Goericke, L. Harding, E. Head, P. Holligan, S. Hooker, D. Karl, M. Landry, R. Letelier, C. A. Llewellyn, M. Lomas, M. Lucas, A. Mannino, J.-C. Marty, B. G. Mitchell, F. Muller-Karger, N. Nelson, C. O'Brien, B. Prezelin, D. Repeta, W. O. Jr. Smith, D. Smythe-Wright, R. Stumpf, A. Subramaniam, K. Suzuki, C. Trees, M. Vernet, N. Wasmund, and S. Wright
Earth Syst. Sci. Data, 5, 109–123, https://doi.org/10.5194/essd-5-109-2013, https://doi.org/10.5194/essd-5-109-2013, 2013
Related subject area
Approach: In situ Observations | Properties and processes: Biogeochemistry and nutrient cycles
Control of spatio-temporal variability of ocean nutrients in the East Australian Current
Drivers of the spatiotemporal distribution of dissolved nitrous oxide and air-sea exchange in a coastal Mediterranean area
The Southern Ocean Time Series: A climatological view of hydrography, biogeochemistry, phytoplankton community composition, and carbon export in the Subantarctic Zone
Biogeochemical Layering and Transformation of Particulate Organic Carbon in the Tropical Northwestern Pacific Ocean Inferred from δ13C
Ventilation of the Bay of Bengal oxygen minimum zone by the Southwest Monsoon Current
Alkalinity sources in the Dutch Wadden Sea
Anthropogenic CO2, air–sea CO2 fluxes, and acidification in the Southern Ocean: results from a time-series analysis at station OISO-KERFIX (51° S–68° E)
Megan Jeffers, Christopher C. Chapman, Bernadette M. Sloyan, and Helen Bostock
Ocean Sci., 21, 537–554, https://doi.org/10.5194/os-21-537-2025, https://doi.org/10.5194/os-21-537-2025, 2025
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This study analyses physical and biogeochemical data collected in the East Australian Current (EAC) to understand variability in the nutrient-poor surface waters. The distribution of nutrients in the water column is influenced by seasonal flow and the EAC's position. An inshore EAC has a deeper nutricline and lower nutrient concentrations compared to an offshore EAC position. This has implications for the marine ecosystems along the coastline.
Susana Flecha, Mercedes de la Paz, Fiz Fernández Pérez, Núria Marbà, Carlos Morell, Eva Alou-Font, Joaquín Tintoré, and Iris E. Hendriks
EGUsphere, https://doi.org/10.5194/egusphere-2024-4166, https://doi.org/10.5194/egusphere-2024-4166, 2025
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Nitrous oxide (N2O), a potent greenhouse gas, remains understudied in coastal areas despite its role in global emissions. This study measured N2O levels and air-sea fluxes in the Balearic coast (Mediterranean Sea) from 2018 to 2023. N2O concentrations showed slight variation across sites, with all areas acting as weak sources of N2O. Temperature emerged as the main factor driving seasonal changes. These insights help refine our understanding of coastal contributions to global N2O emissions.
Elizabeth H. Shadwick, Cathryn A. Wynn-Edwards, Ruth S. Eriksen, Peter Jansen, Xiang Yang, Gemma Woodward, and Diana Davies
EGUsphere, https://doi.org/10.5194/egusphere-2024-3887, https://doi.org/10.5194/egusphere-2024-3887, 2024
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The Southern Ocean Time Series program acquires observations in Subantarctic waters south of Australia. We present the seasonality in hydrography, biogeochemistry, phytoplankton community composition and biodiversity, and carbon export to the deep-sea using observations collected between 1997 and 2022. We also review recent research underpinned by these observations and emphasise the value of long time series for understanding ocean processes and responses to a changing climate.
Detong Tian, Xuegang Li, Jinming Song, Jun Ma, Huamao Yuan, and Liqin Duan
EGUsphere, https://doi.org/10.5194/egusphere-2024-3467, https://doi.org/10.5194/egusphere-2024-3467, 2024
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Particulate organic carbon plays a vital role in the ocean carbon cycle, yet its transformation involves complex processes that are not fully understood. This study examines the vertical distribution the stable carbon isotopes in the tropical Northwestern Pacific, identifying three distinct biogeochemical layers of POC transformation, which contribute to a deeper understanding of the ocean carbon cycle.
Peter M. F. Sheehan, Benjamin G. M. Webber, Alejandra Sanchez-Franks, and Bastien Y. Queste
EGUsphere, https://doi.org/10.5194/egusphere-2024-3681, https://doi.org/10.5194/egusphere-2024-3681, 2024
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Using measurements and computer models, we identify a large flux of oxygen within the Southwest Monsoon Current, which flows north into the Bay of Bengal between June and September each year. Oxygen levels in the Bay are very low, but not quite low enough for key nutrient cycles to be as dramatically altered as in other low-oxygen regions. We suggest that the flux we identify contributes to keeping oxygen levels in the Bay above the threshold below which dramatic changes would occur.
Mona Norbisrath, Justus E. E. van Beusekom, and Helmuth Thomas
Ocean Sci., 20, 1423–1440, https://doi.org/10.5194/os-20-1423-2024, https://doi.org/10.5194/os-20-1423-2024, 2024
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We present an observational study investigating total alkalinity (TA) in the Dutch Wadden Sea. Discrete water samples were used to identify the TA spatial distribution patterns and locate and shed light on TA sources. By observing a tidal cycle, the sediments and pore water exchange were identified as local TA sources. We assumed metabolically driven CaCO3 dissolution as the TA source in the upper, oxic sediments and anaerobic metabolic processes as TA sources in the deeper, anoxic ones.
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.
Cited articles
Alkire, M. B., Lee, C., D'Asaro, E., Perry, M. J., Briggs, N., Cetinic, I., and Gray, A.: Net community production and export from Seaglider measurements in the North Atlantic after the spring bloom, J. Geophys. Res., 119, 6121–6139, https://doi.org/10.1002/2014JC010105, 2014.
Arrigo, K. R., van Dijken, G. L., and Bushinsky, S.: Primary production in the Southern Ocean, 1997–2006, J. Geophys. Res., 113, 184–227, https://doi.org/10.1029/2007JC004551, 2008.
Becquevort, S. and Smith Jr., W. O.: Aggregation, sedimentation and biodegradability of phytoplankton-derived material during spring in the Ross Sea, Antarctica, Deep-Sea Res. Pt. II, 48, 19–20, https://doi.org/10.1016/S0967-0645(01)00084-4, 2001.
Bittig, H. C., Kortzinger, A., Neill, C., van Ooijen, E., Plant, J. N., Hahn, J., Johnson, K. S., Yang, B., and Emerson, S. R.: Oxygen optode sensors: principle, characterization, calibration, and application in the ocean, Front. Mar. Sci., 4, 429, https://doi.org/10.3389/fmars.2017.00429, 2018.
Boss, E. and Pegau, W. S.: Relationship of light scattering at an angle in the backward direction to the backscattering coefficient, Appl. Optics, 40, 5503–5507, https://doi.org/10.1364/AO.40.005503, 2001.
Boyd, P. W., Claustre, H., Levy, M., Siegel, D. A., and Weber, T.: Multi-faceted particle pumps drive carbon sequestration in the ocean, Nature, 568, 327–335, https://doi.org/10.1038/s41586-019-1098-2, 2019.
Buesseler, K. O., Boyd, P. W., Black, E. E., and Siegel, D. A.: Metrics that matter for assessing the ocean biological carbon pump, Proc. Natl. Acad. Sci. USA, 117, 9679–9687, https://doi.org/10.1073/pnas.1918114117, 2020.
Cassar, N., Wright, S. W., Thomson, P. G., Trull, T. W., Westwood, K. J., de Salas, M., Davidson, A., Pearce, I., Davies, D. M., and Matear, R. J.: The relation of mixed-layer net community production to phytoplankton community composition in the Southern Ocean, Global Biogeochem. Cy., 29, 446–462, https://doi.org/10.1002/2014GB004936, 2015.
Chen, S., Smith Jr., W. O., and Yu, X.: Revisiting the ocean color algorithms for particulate organic carbon and chlorophyll-a concentrations in the Ross Sea, J. Geophys. Res., 126, e2021JC017749, https://doi.org/10.1029/2021JC017749, 2021.
Collier, R., Dymond, J., Honjo, S., Manganini, S., Francois, R., and Dunbar, R.: The vertical flux of biogenic and lithogenic material in the Ross Sea: moored sediment trap observations 1996–1998, Deep-Sea Res. Pt. II, 47, 3491–3520, https://doi.org/10.1016/S0967-0645(00)00076-X, 2000.
Demarcq, H.: Trends in primary production, sea surface temperature and wind in upwelling systems (1998–2007), Prog. Oceanogr., 83, 376–385, https://doi.org/10.1016/j.pocean.2009.07.022, 2009.
DeVries, T.: The oceanic anthropogenic CO2 sink: Storage, air-sea fluxes, and transports over the industrial era, Global Biogeochem. Cy., 28, 631–647, https://doi.org/10.1002/2013GB004739, 2014.
Eriksen, C. C., Osse, T. J., Light, R. D., Wen, T., Lehman, T. W., and Sabin, P. L.: Seaglider: a long-range autonomous underwater vehicle for oceanographic research, IEEE J. Ocean. Eng., 26, 424–436, https://doi.org/10.1109/48.972073, 2001.
Ferreira, A., Mendes, C. R. B., Costa, R. R., Brotas, V., Tavano, V. M., Guerreiro, C. V., Secchi, E. R., and Brito, A. C.: Climate change is associated with higher phytoplankton biomass and longer blooms in the West Antarctic Peninsula, Nat. Commun., 15, 6536, https://doi.org/10.1038/s41467-024-50381-2, 2024.
Frajka-Williams, E., Eriksen, C. C., Rhines, P. B., and Harcourt, R. R.: Determining vertical water velocities from Seaglider, J. Atmos. Ocean. Tech., 28, 1641–1656, https://doi.org/10.1175/2011JTECH0830.1, 2011.
Frigstad, H., Henson, S. A., Hartman, S. E., Omar, A. M., Jeansson, E., Cole, H., Pebody, C., and Lampitt, R. S.: Links between surface productivity and deep ocean particle flux at the Porcupine Abyssal Plain sustained observatory, Biogeosciences, 12, 5885–5897, https://doi.org/10.5194/bg-12-5885-2015, 2015.
Gardner, W. D., Richardson, M. J., and Smith Jr., W. O.: Seasonal patterns of water column particulate organic carbon and fluxes in the Ross Sea, Antarctica, Deep-Sea Res. Pt. II, 47, 3424–3449, https://doi.org/10.1016/S0967-0645(00)00074-6, 2000.
Gruber, N., Landschützer, P., and Lovenduski, N. S.: The variable Southern Ocean carbon sink, Annu. Rev. Mar. Sci., 11, 159–86, https://doi.org/10.1146/annurev-marine-121916-063407, 2019.
Hansell, D. A. and Carlson, C. A.: Net community production of dissolved organic carbon, Global Biogeochem. Cy., 12, 443–453, https://doi.org/10.1029/98gb01928, 1998.
Hartman, S. E., Larkin, K. E., Lampitt, R. S., Lankhorst, M., and Hydes, D. J.: Seasonal and inter-annual biogeochemical variations in the Porcupine Abyssal Plain 2003–2005 associated with winter mixing and surface circulation, Deep-Sea Res., 57, 1303–1312, https://doi.org/10.1016/j.dsr2.2010.01.007, 2010.
Hartman, S. E., Bett, B. J., Durden, J. M., Henson, S. A., Iversen, M., Jeffreys, R. M., Horton, T., Lampitt, R., and Gates, A. R.: Enduring science: Three decades of observing the Northeast Atlantic from the Porcupine Abyssal Plain Sustained Observatory (PAP-SO), Prog. Oceanogr., 191, 00068, https://doi.org/10.1016/j.pocean.2020.102508, 2021.
Henson, S., Le Moigne, F., and Geiring, S.: Drivers of carbon export efficiency in the global ocean, Global Biogeochem. Cy., 33, 891–903, https://doi.org/10.1029/2018GB006158, 2019.
Henson, S., Bisson, K., Hammond, M. L., Martin, A., Mouw, C., and Yool, A.: Effect of sampling bias on global estimates of ocean carbon export, Environ. Res. Lett., 19, 024009, https://doi.org/10.1088/1748-9326/ad1e7f, 2024.
Hu, C., Feng, L., Lee, Z., Franz, B. A., Bailey, S. W., Werdell, P. J., and Proctor, C. W.: Improving satellite global chlorophyll a data products through algorithm refinement and data recovery, J. Geophys. Res., 124, 1524–1543, https://doi.org/10.1029/2019JC014941, 2019.
Jones, R. M. and Smith Jr., W. O.: The influence of short-term events on the hydrographic and biological structure of the southwestern Ross Sea, J. Mar. Syst., 166, 184–195, https://doi.org/10.1016/j.jmarsys.2016.09.006, 2017.
Kalnay, E., Kanamitsu, M., Kistler, R., Collins, W., Deaven, D., Gandin, L., Iredell, M., Saha, S., White, G., Woollen, J., Zhu, Y., Chelliah, M., Ebisuzaki, W., Higgins, W., Janowiak, J., Mo, K. C., Ropelewski, C., Wang, J., Leetmaa, A., Reynolds, R., Jenne, R., and Joseph, D.: The NCEP/NCAR 40-year reanalysis project, B. Am. Meteorol. Soc., 77, 437–470, 1996.
Karl, D. M. and Church, M. J.: Microbial oceanography and the Hawaii Ocean Timeseries programme, Nat. Rev. Micro., 12, 699–713, https://doi.org/10.1038/nrmicro3333, 2014.
Kaufman, D. E., Friedrichs, M. A. M., Smith Jr., W. O., Queste, B. Y., and Heywood, K. J.: Biogeochemical variability in the southern Ross Sea as observed by a glider deployment, Deep-Sea Res. Pt. I, 92, 93–106, https://doi.org/10.1016/j.dsr.2014.06.011, 2014.
Kaufman, D. E., Friedrichs, M. A., Smith Jr., W. O., Hofman, E. E., Dinniman, M. S., and Hennings, J. C. P.: Climate change impacts on Ross Sea biogeochemistry: Results from 1D modeling experiments, J. Geophys. Res.-Oceans, 122, 2339–2359, https://doi.org/10.1002/2016JC012514, 2017.
Laws, E. A.: Photosynthetic quotients, new production and net community production in the open ocean, Deep-Sea Res., 38, 143–167, 1991.
Liang, J., Deutsch, C., McWilliams, J. C., Baschek, B., Sullivan, P. P., and Chiba, D.: Parameterizing bubble-mediated air-sea gas exchange and its effect on ocean ventilation, Global Biogeochem. Cy., 27, 894–905, https://doi.org/10.1002/gbc.20080, 2013.
Lo Monaco, C., Metzl, N., Poisson, A., Brunet, C., and Schauer, B.: Anthropogenic CO2 in the Southern Ocean: Distribution and inventory at the Indian-Atlantic boundary (World Ocean Circulation Experiment line I6), J. Geophy. Res.-Oceans, 110, C06010, https://doi.org/10.1029/2004JC002643, 2005.
Martin, J. H., Knauer, G. A., Karl, D. M., and Broenkow, W. W.: VERTEX: Carbon cycling in the northeast Pacific, Deep-Sea Res. I, 34, 267–285, https://doi.org/10.1016/0198-0149(87)90086-0, 1987.
Meyer, M. G., Jones, R. M., and Smith Jr., W. O.: Quantifying seasonal particulate organic carbon concentrations and export potential in the Southwestern Ross Sea using autonomous gliders, J. Geophys. Res., 127, e2022JC018798, https://doi.org/10.1029/2022JC018798, 2022a.
Meyer, M. G., Gong, W., Kafrissen, S. M., Torano, O., Varela, D. E., Santoro, A. E., Cassar, N., Gifford, S., Niebergall, A. K., Sharpe, G., and Marchetti, A.: Phytoplankton size-class contributions to new and regenerated production during the EXPORTS Northeast Pacific Ocean field deployment, Elem. Sci. Anthro., 10, 00068, https:// doi.org/10.1525/elementa.2021.00068, 2022b.
Misic, C., Harriague, A. C., Mangoni, O., Aulicino, G., Castagno, P., and Cotroneo, Y.: Effects of physical constraints on the lability of POM during summer in the Ross Sea, J. Mar. Syst., 166, 132–143, https://doi.org/10.1016/j.jmarsys.2016.06.012, 2017.
Misic, C., Bolinesi, F., Castellano, M., Olivari, E., Povero, P., Fusco, G., Saggiomo, M., and Mangoni, O.: Factors driving the bioavailability of particulate organic matter in the Ross Sea (Antarctica) during summer, Hydrobiologia, 851, 2657–2679, https://doi.org/10.1007/s10750-024-05482-w, 2024.
Moreau, S., Mostajir, B., Belanger, S., Schloss, I. R., Vancoppenolle, M., Demers, S., and Ferreyra, G. A.: Climate change enhances primary production in the western Antarctic Peninsula, Glob. Change Biol., 21, 2191–2205, https://doi.org/10.1111/gcb.12878, 2015.
Morel, A.: Optical properties of pure water and pure seawater, Optical Aspects of Oceanography, edited by: Jerlov, N. G. and Steemann Nielsen, E., Academic, San Diego, CA, 494 pp., 1974.
Nelson, D. M., DeMaster, D. J., Dunabr, R. B., and Smith Jr., W. O.: Cycling of organic carbon and biogenic silica in the Southern Ocean: Estimates of water-column and sedimentary fluxes on the Ross Sea continental shelf, J. Geophys. Res., 101, 18519–18532, https://doi.org/10.1029/96JC01573, 1996.
Niebergall, A. K., Traylor, S., Huang, Y., Feen, M., Meyer, M. G., McNair, H. M., Nicholson, D., Fassbender, A. J., Omand, M. M., Marchetti, A., Menden-Deuer, S., Tang, W., Gong, W., Tortell, P., Hamme, R., and Cassar, N.: Evaluation of new and net community production estimates by multiple ship-based and autonomous observation in the Northeast Pacific Ocean, Elem. Sci. Anthro., 11, 00107, https://doi.org/10.1525/elementa.2021.00107, 2023.
Portela, E., Meyer, M. G., Smith Jr., W. O., and Heywood, K.: Unprecedented phytoplankton summer bloom in the Ross Sea, Geophys. Res. Lett., 52, e2024GL111264, https://doi.org/10.1029/2024GL111264, 2025.
Queste, B. Y., Heywood, K. J., Smith Jr., W. O., Kaufman, D. E., Jickells, T. D., and Dinniman, M. S.: Dissolved oxygen dynamics during a phytoplankton bloom in the Ross Sea polynya, Ant. Sci., 27, 362–372, https://doi.org/10.1017/S0954102014000881, 2015.
Rousseau, V., Mathot, S., and Lancelot, C.: Calculating carbon biomass of Phaeocystis sp. from microscopic observations, Mar. Biol., 107, 305–314, https://doi.org/10.1007/BF01319830, 1990.
Salaun, J. and Le Menn, M.: In situ calibration of Wetlabs chlorophyll sensors: a methodology adapted to profile measurements, Sensors, 23, 5, https://doi.org/10.3390/s23052825, 2023.
Sanz Rodrigo, J., Buchlin, J.-M., van Beeck, J., Lenaerts, J. T. M., and van den Broeke, M. R.: Evaluation of the Antarctic surface wind climate from ERA reanalyses and RACMO2/ANT simulations based on automatic weather stations, Clim. Dynam., 40, 353–376, https://doi.org/10.1007/s00382-012-1396-y, 2012.
Schine, C. M. S., van Dijken, G., and Arrigo, K. R.: Spatial analysis of trends in primary production and relationship with large-scale climate variability in the Ross Sea, Antarctica (1997–2013), J. Geophys. Res.-Oceans, 121, 368–386, https://doi.org/10.1002/2015JC011014, 2015.
Siegel, D. A., Buesseler, K. O., Behrenfeld, M. J., Benitez-Nelson, C. R., Boss, E., Brzezinski, M. A., Burd, A., Carlson, C. A., D'Asaro, E. A., Doney, S. C., Perry, M. J., Stanley, R. H. R., and Steinberg, D. K.: Prediction of the export and fate of global ocean net primary production: The EXPORTS science plan, Elementa, 3, 22, https://doi.org/10.1525/elementa.2020.00107, 2016.
Smith Jr., W. O.: Data from GOVARS iRobot Seaglider AUV-SG-502 released into McMurdo Sound, Southern Ross Sea, 2010-2011 (GOVARS project), Biological and Chemical Oceanography Data Management Office (BCO-DMO) (Version 1) [data set], https://lod.bco-dmo.org/dataset/532608 (last access: 15 November 2023), 2014.
Smith Jr., W. O.: Glider data from the southern Ross Sea collected from the iRobot Seaglider during the RVIB Nathaniel B. Palmer (AUV-SG-503-2012, NBP1210) cruises in 2012 (Penguin Glider project), Biological and Chemical Oceanography Data Management Office (BCO-DMO) (Version 4) [data set], http://lod.bco-dmo.org/id/dataset/568868 (last access: 4 April 2023), 2015.
Smith Jr., W. O. and Comiso, J. C.: Influence of sea ice primary production in the Southern Ocean: A satellite perspective, J. Geophys. Res., 113, C05S93, https://doi.org/10.1029/2007JC004251, 2008.
Smith Jr., W. O. and Kaufman, D. E.: Climatological temporal and spatial distributions of nutrients and particulate matter in the Ross Sea, Prog. Oceanogr., 168, 182–195, https://doi.org/10.1016/j.pocean.2018.10.003, 2018.
Smith Jr., W. O., Marra, J., Hiscock, M. R., and Barber, R. T.: The seasonal cycle of phytoplankton biomass and primary productivity in the Ross Sea, Antarctica, Deep-Sea Res. Pt. II, 47, 3119–3140, https://doi.org/10.1016/S0967-0645(00)00061-8, 2000.
Smith Jr., W. O., Asper, V. L., Tozzi, S., Liu, X., and Stammerjohn, S. E.: Surface layer variability in the Ross Sea, Antarctica as assessed by in situ fluorescence measurements, Prog. Oceanogr., 88, 28–45, https://doi.org/10.1016/j.pocean.2010.08.002, 2011.
Smith Jr., W. O., Ainley, D. G., Arrigo, K. R., and Dinniman, M. S.: The oceanography and ecology of the Ross Sea, Annu. Rev. Mar. Sci., 6, 469–487, https://doi.org/10.1146/annurev-marine-010213-135114, 2014.
Smith Jr., W. O., Tozzi, S., Long, M. C., Sedwick, P. N., Peloquin, J. A., Dunbar, R. B., Hutchins, D. A., Kolber, Z., and DiTullio, G. R.: Spatial and temporal variations in variable fluorescence in the Ross Sea (Antarctica): Oceanographic correlates and bloom dynamics, Deep-Sea Res. Pt. I, 79, 141–155, https://doi.org/10.1016/j.dsr.2013.05.002, 2013.
Spreen, G., Kaleschke, L., and Heygster, G.: Sea ice remote sensing using AMSR-E 89 GHz channels, J. Geophys. Res., 113, C02S03, https://doi.org/10.1029/2005JC003384, 2008.
Steinberg, D. K., Carlson, C. A., Bates, N. R., Johnson, R. J., Michaels, A. F., and Knap, A. H.: Overview of the US JGOFS Bermuda Atlantic Time-series Study (BATS): a decade-scale look at ocean biology and biogeochemistry, Deep-Sea Res., 48, 1405–1447, https://doi.org/10.1016/S0967-0645(00)00148-X, 2001.
Sweeney, C., Hansell, D. A., Carlson, C. A., Codispoti, L. A., Gordon, L. I., Marra, J., Millero, F. J., Smith Jr., W. O., and Takahashi, T.: Biogeochemical regimes, net community production and carbon export in the Ross Sea, Antarctica, Deep-Sea Res. Pt. II, 47, 3369–3394, https://doi.org/10.1016/S0967-0645(00)00072-2, 2000.
Thomalla, S. J., Nicholson, S.-A., Ryan-Keogh, T. J., and Smith, M. E.: Widespread changes in Southern Ocean phytoplankton blooms linked to climate drivers, Nat. Clim. Chan., 13, 975–984, https://doi.org/10.1038/s41558-023-01768-4, 2023.
Turner, J., Holmes, C., Harrison, T. C., Phillips, T., Jena, B., Reeves-Francois, T., Fogt, R., Thomas, E. R., and Bajish, T. C. C.: Record low Antarctic sea ice cover in February 2022, Geophys. Res. Lett., 49, e2022GL098904, https://doi.org/10.1029/2022GL098904, 2022.
Wanninkhof, R.: Relationship between wind speed and gas exchange over the ocean revisited, Limnol. Oceangr. Meth., 12, 351–362, https://doi.org/10.4319/lom.2014.12.351, 2014.
Yang, B., Emerson, S. R., and Bushinsky, S. M.: Annual net community production in the subtropical Pacific Ocean from in situ oxygen measurements on profiling floats, Global Biogeochem. Cy., 31, 728–744, https://doi.org/10.1002/2016GB005545, 2017.
Short summary
During the annual phytoplankton bloom, rates of primary production and carbon export in the Ross Sea, Antarctica, are uncoupled from each other and from oxygen and carbon stocks. These biogeochemical rates support the high-productivity, low-export classification of the region and suggest that environmental factors influence these stocks and rates differently and make projections under future climate change scenarios difficult.
During the annual phytoplankton bloom, rates of primary production and carbon export in the Ross...
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