Articles | Volume 17, issue 2
https://doi.org/10.5194/bg-17-529-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-17-529-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
31 Jan 2020
Research article |
| 31 Jan 2020
| 31 Jan 2020
Physical drivers of the nitrate seasonal variability in the Atlantic cold tongue
Marie-Hélène Radenac
CORRESPONDING AUTHOR
LEGOS, IRD-Université Paul Sabatier-Observatoire
Midi-Pyrénées, Toulouse, 31400, France
Julien Jouanno
LEGOS, IRD-Université Paul Sabatier-Observatoire
Midi-Pyrénées, Toulouse, 31400, France
Christine Carine Tchamabi
LEGOS, IRD-Université Paul Sabatier-Observatoire
Midi-Pyrénées, Toulouse, 31400, France
deceased
Mesmin Awo
LEGOS, IRD-Université Paul Sabatier-Observatoire
Midi-Pyrénées, Toulouse, 31400, France
Nansen-Tutu Centre for Marine Environmental Research, Department of
Oceanography, University of Cape Town, Cape Town, South Africa
LHMC, IRHOB, IRD, Cotonou, Benin
Bernard Bourlès
IRD, US191 “Instrumentation, Moyens Analytiques, Observatoires en
Géophysique et Océanographie” (IMAGO), Technopole Pointe du Diable,
Plouzané, France
Sabine Arnault
LOCEAN, CNRS, IRD, Sorbonne Universités, MNHN, Paris, 75005,
France
Olivier Aumont
LOCEAN, CNRS, IRD, Sorbonne Universités, MNHN, Paris, 75005,
France
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Cited
16 citations as recorded by crossref.
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- Identifying the biological control of the annual and multi-year variations in South Atlantic air–sea CO2 flux D. Ford et al. 10.5194/bg-19-4287-2022
- Seasonal productivity of the equatorial Atlantic shaped by distinct wind-driven processes P. Brandt et al. 10.1038/s41561-024-01609-9
- Influence of ocean salinity stratification on the tropical Atlantic Ocean surface M. Gévaudan et al. 10.1007/s00382-021-05713-z
- Unravelling nutrient dynamics and mixed layer depth variability in the equatorial Atlantic: insights from 10°W meridional section monitoring K. Kouame et al. 10.3389/fmars.2024.1198106
- Physical processes and biological productivity in the upwelling regions of the tropical Atlantic P. Brandt et al. 10.5194/os-19-581-2023
- The Seasonality of Eddy-Induced Chlorophyll-a Anomalies in the Kuroshio Extension System T. Wang et al. 10.3390/rs15153865
- Biogeochemical parameters collected and analysed during the French cruises of the PIRATA programme in the Guinea Gulf, 1997--2024 T. Cariou et al. 10.1038/s41597-025-05003-x
- Trends and drivers of CO2 parameters, from 2006 to 2021, at a time-series station in the Eastern Tropical Atlantic (6°S, 10°W) N. Lefèvre et al. 10.3389/fmars.2024.1299071
- Ocean Circulation Drives the Variability of the Carbon System in the Eastern Tropical Atlantic N. Lefèvre et al. 10.3390/oceans2010008
- How do Climate Modes Shape the Chlorophyll‐a Interannual Variability in the Tropical Atlantic? F. Chenillat et al. 10.1029/2021GL093769
- Modulation of Equatorial Currents and Tropical Instability Waves During the 2021 Atlantic Niño F. Tuchen et al. 10.1029/2023JC020431
- African desert dust influences migrations and fisheries of the Atlantic skipjack-tuna S. Rodríguez et al. 10.1016/j.atmosenv.2023.120022
- A NEMO-based model of Sargassum distribution in the tropical Atlantic: description of the model and sensitivity analysis (NEMO-Sarg1.0) J. Jouanno et al. 10.5194/gmd-14-4069-2021
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16 citations as recorded by crossref.
- The Photophysiological Response of Nitrogen-Limited Phytoplankton to Episodic Nitrogen Supply Associated With Tropical Instability Waves in the Equatorial Atlantic J. Sherman et al. 10.3389/fmars.2021.814663
- Identifying the biological control of the annual and multi-year variations in South Atlantic air–sea CO2 flux D. Ford et al. 10.5194/bg-19-4287-2022
- Seasonal productivity of the equatorial Atlantic shaped by distinct wind-driven processes P. Brandt et al. 10.1038/s41561-024-01609-9
- Influence of ocean salinity stratification on the tropical Atlantic Ocean surface M. Gévaudan et al. 10.1007/s00382-021-05713-z
- Unravelling nutrient dynamics and mixed layer depth variability in the equatorial Atlantic: insights from 10°W meridional section monitoring K. Kouame et al. 10.3389/fmars.2024.1198106
- Physical processes and biological productivity in the upwelling regions of the tropical Atlantic P. Brandt et al. 10.5194/os-19-581-2023
- The Seasonality of Eddy-Induced Chlorophyll-a Anomalies in the Kuroshio Extension System T. Wang et al. 10.3390/rs15153865
- Biogeochemical parameters collected and analysed during the French cruises of the PIRATA programme in the Guinea Gulf, 1997--2024 T. Cariou et al. 10.1038/s41597-025-05003-x
- Trends and drivers of CO2 parameters, from 2006 to 2021, at a time-series station in the Eastern Tropical Atlantic (6°S, 10°W) N. Lefèvre et al. 10.3389/fmars.2024.1299071
- Ocean Circulation Drives the Variability of the Carbon System in the Eastern Tropical Atlantic N. Lefèvre et al. 10.3390/oceans2010008
- How do Climate Modes Shape the Chlorophyll‐a Interannual Variability in the Tropical Atlantic? F. Chenillat et al. 10.1029/2021GL093769
- Modulation of Equatorial Currents and Tropical Instability Waves During the 2021 Atlantic Niño F. Tuchen et al. 10.1029/2023JC020431
- African desert dust influences migrations and fisheries of the Atlantic skipjack-tuna S. Rodríguez et al. 10.1016/j.atmosenv.2023.120022
- A NEMO-based model of Sargassum distribution in the tropical Atlantic: description of the model and sensitivity analysis (NEMO-Sarg1.0) J. Jouanno et al. 10.5194/gmd-14-4069-2021
- Assessing the tropical Atlantic biogeochemical processes in the Norwegian Earth System Model S. Koseki et al. 10.5194/bg-21-4149-2024
- Multidecadal Intensification of Atlantic Tropical Instability Waves F. Tuchen et al. 10.1029/2022GL101073
Latest update: 06 Jun 2025
Short summary
Satellite data and a remarkable set of in situ measurements show a main bloom of microscopic seaweed, the phytoplankton, in summer and a secondary bloom in December in the central equatorial Atlantic. They are driven by a strong vertical supply of nitrate in May–July and a shorter and moderate supply in November. In between, transport of low-nitrate water from the west explains most nitrate losses in the sunlit layer. Horizontal eddy-induced processes also contribute to seasonal nitrate removal.
Satellite data and a remarkable set of in situ measurements show a main bloom of microscopic...
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