Multiple drivers of production and particle export in the western tropical North Atlantic
To assess the impacts of Amazon River discharge, Saharan dust deposition, N 2 -fixation and mixed-layer deepening on the biological carbon pump, sediment traps were moored from October 2012 to November 2013 at two sites in the western tropical North Atlantic (49°W,12°N/57°W,12°N). Particle exports i...
Published in: | Limnology and Oceanography |
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Main Authors: | , , , , , , , , |
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Language: | English |
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2020
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Online Access: | https://research.vu.nl/en/publications/36921e22-6672-4213-9782-8b1f612b3964 https://doi.org/10.1002/lno.11442 https://hdl.handle.net/1871.1/36921e22-6672-4213-9782-8b1f612b3964 http://www.scopus.com/inward/record.url?scp=85084659166&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85084659166&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/36921e22-6672-4213-9782-8b1f612b3964 2024-09-15T18:22:18+00:00 Multiple drivers of production and particle export in the western tropical North Atlantic Korte, Laura F. Brummer, Geert Jan A. van der Does, Michèlle Guerreiro, Catarina V. Mienis, Furu Munday, Chris I. Ponsoni, Leandro Schouten, Stefan Stuut, Jan Berend W. 2020-09 https://research.vu.nl/en/publications/36921e22-6672-4213-9782-8b1f612b3964 https://doi.org/10.1002/lno.11442 https://hdl.handle.net/1871.1/36921e22-6672-4213-9782-8b1f612b3964 http://www.scopus.com/inward/record.url?scp=85084659166&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85084659166&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/36921e22-6672-4213-9782-8b1f612b3964 info:eu-repo/semantics/openAccess Korte , L F , Brummer , G J A , van der Does , M , Guerreiro , C V , Mienis , F , Munday , C I , Ponsoni , L , Schouten , S & Stuut , J B W 2020 , ' Multiple drivers of production and particle export in the western tropical North Atlantic ' , Limnology and Oceanography , vol. 65 , no. 9 , pp. 2108-2124 . https://doi.org/10.1002/lno.11442 /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2020 ftvuamstcris https://doi.org/10.1002/lno.11442 2024-07-31T23:46:03Z To assess the impacts of Amazon River discharge, Saharan dust deposition, N 2 -fixation and mixed-layer deepening on the biological carbon pump, sediment traps were moored from October 2012 to November 2013 at two sites in the western tropical North Atlantic (49°W,12°N/57°W,12°N). Particle exports interpreted along with satellite- and Argo-float data show peak fluxes in biogenic silica (31 mg m −2 d −1 ) and organic carbon (25 mg m −2 d −1 ) during the fall of 2013 that were ten to five times higher than any time earlier during the year. These high export fluxes occurred in tandem with high surface chlorophyll a concentrations associated with the dispersal of the Amazon River plume, following retroflection into the North-Atlantic-Counter-Current. High fucoxanthin fluxes (' 80 μg m −2 d −1 ) and low δ 15 N-values (−0.6‰) suggest a large contribution by marine diatom-diazotrophic-associations, possibly enhanced by wet Saharan dust deposition. During summer, the Amazon River plume resulted in high mass fluxes at 57°W that were enriched in biogenic silica but weakly influenced by diazotrophic-associations compared to the fall event at 49°W. High carbonate-carbon fluxes (17 mg m −2 d −1 ) dominated a second single event at 49°W during spring that was likely triggered by mixed-layer deepening. Rain-ratios of BSi/C carb amounted to 1.7 when associated with high export fluxes linked to the Amazon River plume. Compared to an annual average of 0.3, this indicates a more efficient uptake of CO 2 via the biological pump compared to when the plume was absent, hence supporting earlier observations that the Amazon River plume is important for ocean CO 2 sequestration. Article in Journal/Newspaper North Atlantic Vrije Universiteit Amsterdam (VU): Research Portal Limnology and Oceanography 65 9 2108 2124 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Korte, Laura F. Brummer, Geert Jan A. van der Does, Michèlle Guerreiro, Catarina V. Mienis, Furu Munday, Chris I. Ponsoni, Leandro Schouten, Stefan Stuut, Jan Berend W. Multiple drivers of production and particle export in the western tropical North Atlantic |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
To assess the impacts of Amazon River discharge, Saharan dust deposition, N 2 -fixation and mixed-layer deepening on the biological carbon pump, sediment traps were moored from October 2012 to November 2013 at two sites in the western tropical North Atlantic (49°W,12°N/57°W,12°N). Particle exports interpreted along with satellite- and Argo-float data show peak fluxes in biogenic silica (31 mg m −2 d −1 ) and organic carbon (25 mg m −2 d −1 ) during the fall of 2013 that were ten to five times higher than any time earlier during the year. These high export fluxes occurred in tandem with high surface chlorophyll a concentrations associated with the dispersal of the Amazon River plume, following retroflection into the North-Atlantic-Counter-Current. High fucoxanthin fluxes (' 80 μg m −2 d −1 ) and low δ 15 N-values (−0.6‰) suggest a large contribution by marine diatom-diazotrophic-associations, possibly enhanced by wet Saharan dust deposition. During summer, the Amazon River plume resulted in high mass fluxes at 57°W that were enriched in biogenic silica but weakly influenced by diazotrophic-associations compared to the fall event at 49°W. High carbonate-carbon fluxes (17 mg m −2 d −1 ) dominated a second single event at 49°W during spring that was likely triggered by mixed-layer deepening. Rain-ratios of BSi/C carb amounted to 1.7 when associated with high export fluxes linked to the Amazon River plume. Compared to an annual average of 0.3, this indicates a more efficient uptake of CO 2 via the biological pump compared to when the plume was absent, hence supporting earlier observations that the Amazon River plume is important for ocean CO 2 sequestration. |
format |
Article in Journal/Newspaper |
author |
Korte, Laura F. Brummer, Geert Jan A. van der Does, Michèlle Guerreiro, Catarina V. Mienis, Furu Munday, Chris I. Ponsoni, Leandro Schouten, Stefan Stuut, Jan Berend W. |
author_facet |
Korte, Laura F. Brummer, Geert Jan A. van der Does, Michèlle Guerreiro, Catarina V. Mienis, Furu Munday, Chris I. Ponsoni, Leandro Schouten, Stefan Stuut, Jan Berend W. |
author_sort |
Korte, Laura F. |
title |
Multiple drivers of production and particle export in the western tropical North Atlantic |
title_short |
Multiple drivers of production and particle export in the western tropical North Atlantic |
title_full |
Multiple drivers of production and particle export in the western tropical North Atlantic |
title_fullStr |
Multiple drivers of production and particle export in the western tropical North Atlantic |
title_full_unstemmed |
Multiple drivers of production and particle export in the western tropical North Atlantic |
title_sort |
multiple drivers of production and particle export in the western tropical north atlantic |
publishDate |
2020 |
url |
https://research.vu.nl/en/publications/36921e22-6672-4213-9782-8b1f612b3964 https://doi.org/10.1002/lno.11442 https://hdl.handle.net/1871.1/36921e22-6672-4213-9782-8b1f612b3964 http://www.scopus.com/inward/record.url?scp=85084659166&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85084659166&partnerID=8YFLogxK |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Korte , L F , Brummer , G J A , van der Does , M , Guerreiro , C V , Mienis , F , Munday , C I , Ponsoni , L , Schouten , S & Stuut , J B W 2020 , ' Multiple drivers of production and particle export in the western tropical North Atlantic ' , Limnology and Oceanography , vol. 65 , no. 9 , pp. 2108-2124 . https://doi.org/10.1002/lno.11442 |
op_relation |
https://research.vu.nl/en/publications/36921e22-6672-4213-9782-8b1f612b3964 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/lno.11442 |
container_title |
Limnology and Oceanography |
container_volume |
65 |
container_issue |
9 |
container_start_page |
2108 |
op_container_end_page |
2124 |
_version_ |
1810461941941927936 |