Articles | Volume 17, issue 7
https://doi.org/10.5194/essd-17-3583-2025
© Author(s) 2025. 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-17-3583-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Data description article
| 
30 Jul 2025
Data description article |
| 30 Jul 2025
| 30 Jul 2025
Exploring the CO2 fugacity along the east coast of South America aboard the schooner Tara
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Department of Geography, Ludwig-Maximilians-Universität München, Munich, Germany
LOCEAN-IPSL, Sorbonne Université-CNRS-IRD-MNHN, Paris, France
Jacqueline Boutin
LOCEAN-IPSL, Sorbonne Université-CNRS-IRD-MNHN, Paris, France
Gilles Reverdin
LOCEAN-IPSL, Sorbonne Université-CNRS-IRD-MNHN, Paris, France
Christopher Hunt
OPAL, EOS, University of New Hampshire, Durham, New Hampshire, USA
Thomas Linkowski
Tara Ocean Foundation, Paris, France
Alison Chase
Applied Physics Laboratory, University of Washington, Seattle, Washington, USA
School of Marine Sciences, University of Maine, Orono, Maine, USA
Nils Haentjens
School of Marine Sciences, University of Maine, Orono, Maine, USA
Pedro C. Junger
Department of Hydrobiology, Universidade Federal de São Carlos (UFSCar), São Carlos, SP 13565-905, Brazil
Programa de Pós-Graduação em Ecologia e Recursos Naturais, Centro de Ciências Biológicas e da Saúde, Universidade Federal de São Carlos (UFSCar), São Carlos, SP 13565-905, Brazil
present address: Institut de Biologie de l'École Normale Supérieure (IBENS), École Normale Supérieure, CNRS, INSERM, PSL Université Paris, Paris 75005, France
Stéphane Pesant
European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, Cambridge CB10 1SD, United Kingdom
Douglas Vandemark
OPAL, EOS, University of New Hampshire, Durham, New Hampshire, USA
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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.
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.
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Short summary
The air–sea CO2 flux in coastal waters plays a key role in the global carbon budget but remains poorly understood. In 2021, the Tara schooner collected 14 000 km of CO2 fugacity (fCO2) data along the South American coast. This dataset improves our understanding of fCO2 in the under-sampled Brazilian coastal region and provides a unique insight into the complex biogeochemistry of the Amazon River–ocean continuum.
The air–sea CO2 flux in coastal waters plays a key role in the global carbon budget but remains...
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