The Amazon River plume—a Lagrangian view
Abstract Hydrographic data, nutrient data and bulk rates of nitrate uptake and primary production were determined in the Amazon River plume (ARP) in the Western Tropical North Atlantic (WTNA) during three cruises in May 2018, June/July 2019, with RV Endeavor and April/May 2021 with RV Meteor. Using...
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crwiley:10.1002/lom3.10626 2024-06-23T07:55:11+00:00 The Amazon River plume—a Lagrangian view Dippner, Joachim W. Montoya, Joseph P. Subramaniam, Ajit Umbricht, Jacqueline Voss, Maren Fondation BNP Paribas Deutsche Forschungsgemeinschaft National Science Foundation Deutsche Forschungsgemeinschaft 2024 http://dx.doi.org/10.1002/lom3.10626 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lom3.10626 en eng Wiley http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography: Methods ISSN 1541-5856 1541-5856 journal-article 2024 crwiley https://doi.org/10.1002/lom3.10626 2024-06-04T06:39:56Z Abstract Hydrographic data, nutrient data and bulk rates of nitrate uptake and primary production were determined in the Amazon River plume (ARP) in the Western Tropical North Atlantic (WTNA) during three cruises in May 2018, June/July 2019, with RV Endeavor and April/May 2021 with RV Meteor. Using daily quasi‐geostrophic surface velocity data from satellite observations, the geographical positions of the stations of observations were transformed onto Lagrangian coordinates to obtain a dynamically coherent and consistent spatial distribution. After the transformation, the observed surface salinity and temperature fields were consistent with the flow fields, the ARP formed a coherent structure and the retroflection of the North Brazil Current became visible. By transforming other surface variables such as nitrate concentration, photosynthetically available radiation, turbidity, bulk rates of nitrate uptake, and primary production onto Lagrangian coordinates, patterns became consistent with the physical variables at the surface. The use of “synchronous” fields as done here by transformation onto Lagrangian coordinates is essential for spatially structured analyses of data collected over tens of days in a highly dynamic region characterized by complex flow fields with low persistence such as the WTNA. Therefore, the use of the Lagrangian method provides a powerful tool for exploring spatial distributions of biologically relevant factors in regions with complex and dynamic flow patterns. These spatial distributions are qualitatively in agreement with satellite images of daily sea surface temperature and composites of monthly mean Chlorophyll a distributions. Article in Journal/Newspaper North Atlantic Wiley Online Library Limnology and Oceanography: Methods |
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English |
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Abstract Hydrographic data, nutrient data and bulk rates of nitrate uptake and primary production were determined in the Amazon River plume (ARP) in the Western Tropical North Atlantic (WTNA) during three cruises in May 2018, June/July 2019, with RV Endeavor and April/May 2021 with RV Meteor. Using daily quasi‐geostrophic surface velocity data from satellite observations, the geographical positions of the stations of observations were transformed onto Lagrangian coordinates to obtain a dynamically coherent and consistent spatial distribution. After the transformation, the observed surface salinity and temperature fields were consistent with the flow fields, the ARP formed a coherent structure and the retroflection of the North Brazil Current became visible. By transforming other surface variables such as nitrate concentration, photosynthetically available radiation, turbidity, bulk rates of nitrate uptake, and primary production onto Lagrangian coordinates, patterns became consistent with the physical variables at the surface. The use of “synchronous” fields as done here by transformation onto Lagrangian coordinates is essential for spatially structured analyses of data collected over tens of days in a highly dynamic region characterized by complex flow fields with low persistence such as the WTNA. Therefore, the use of the Lagrangian method provides a powerful tool for exploring spatial distributions of biologically relevant factors in regions with complex and dynamic flow patterns. These spatial distributions are qualitatively in agreement with satellite images of daily sea surface temperature and composites of monthly mean Chlorophyll a distributions. |
author2 |
Fondation BNP Paribas Deutsche Forschungsgemeinschaft National Science Foundation Deutsche Forschungsgemeinschaft |
format |
Article in Journal/Newspaper |
author |
Dippner, Joachim W. Montoya, Joseph P. Subramaniam, Ajit Umbricht, Jacqueline Voss, Maren |
spellingShingle |
Dippner, Joachim W. Montoya, Joseph P. Subramaniam, Ajit Umbricht, Jacqueline Voss, Maren The Amazon River plume—a Lagrangian view |
author_facet |
Dippner, Joachim W. Montoya, Joseph P. Subramaniam, Ajit Umbricht, Jacqueline Voss, Maren |
author_sort |
Dippner, Joachim W. |
title |
The Amazon River plume—a Lagrangian view |
title_short |
The Amazon River plume—a Lagrangian view |
title_full |
The Amazon River plume—a Lagrangian view |
title_fullStr |
The Amazon River plume—a Lagrangian view |
title_full_unstemmed |
The Amazon River plume—a Lagrangian view |
title_sort |
amazon river plume—a lagrangian view |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/lom3.10626 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lom3.10626 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Limnology and Oceanography: Methods ISSN 1541-5856 1541-5856 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lom3.10626 |
container_title |
Limnology and Oceanography: Methods |
_version_ |
1802647656666759168 |