Direct observation of North Atlantic nutrient transport and biological pump variability linked to the Meridional Overturning Circulation
The ocean biological carbon pump (BCP) plays a pivotal role in the global carbon cycle. The BCP magnitude is determined by the fraction of nutrients utilised in biological production and remineralised at depth, with the remainder being subducted into the interior unused as ‘preformed’ nutrients. Thi...
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ftarchimer:oai:archimer.ifremer.fr:99842 2024-05-12T08:07:47+00:00 Direct observation of North Atlantic nutrient transport and biological pump variability linked to the Meridional Overturning Circulation Carracedo, Lidia Mcdonagh, Elaine Sanders, Richard Moore, C. Mark Mercier, Herle Brown, Peter Torres-valdés, Sinhué Mawji, Edward Baringer, Molly Smeed, David Rosón, Gabriel 2024-04-11 application/pdf https://archimer.ifremer.fr/doc/00887/99842/109942.pdf https://doi.org/10.21203/rs.3.rs-4186952/v1 https://archimer.ifremer.fr/doc/00887/99842/ eng eng Research Square Platform LLC info:eu-repo/grantAgreement/EC/FP7/633211/EU//AtlantOS https://archimer.ifremer.fr/doc/00887/99842/109942.pdf doi:10.21203/rs.3.rs-4186952/v1 https://archimer.ifremer.fr/doc/00887/99842/ info:eu-repo/semantics/openAccess restricted use Preprint (Research Square Platform LLC), 2024-04-11 , P. 65p. Earth and environmental science Ocean sciences Marine chemistry Physical oceanography text Article info:eu-repo/semantics/article 2024 ftarchimer https://doi.org/10.21203/rs.3.rs-4186952/v1 2024-04-17T14:00:53Z The ocean biological carbon pump (BCP) plays a pivotal role in the global carbon cycle. The BCP magnitude is determined by the fraction of nutrients utilised in biological production and remineralised at depth, with the remainder being subducted into the interior unused as ‘preformed’ nutrients. This fraction is currently around 50% and subject to the interaction of biological processes and global scale circulation. Consequently, changes in circulation can potentially impact biological carbon storage. Here we provide observational evidence that the reduction in the Atlantic Meridional Overturning Circulation (AMOC) that occurred over the 2004-2018 period has been accompanied by substantial changes in nutrient transports and associated carbon storage. Persistent southward net nutrient transport across 26.5°N exceeded nutrient sources, except by the end of the period when the system approached balance. This transient net loss of nutrients from the North Atlantic was accompanied by increases in the ratio of remineralized to preformed nutrients, indicating an increasing BCP efficiency (and carbon storage). Our results thus demonstrate observable transient changes in large scale nutrient transports linked to AMOC changes over interannual - decadal timescales, with implications for future ocean carbon storage. Article in Journal/Newspaper North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Earth and environmental science Ocean sciences Marine chemistry Physical oceanography |
spellingShingle |
Earth and environmental science Ocean sciences Marine chemistry Physical oceanography Carracedo, Lidia Mcdonagh, Elaine Sanders, Richard Moore, C. Mark Mercier, Herle Brown, Peter Torres-valdés, Sinhué Mawji, Edward Baringer, Molly Smeed, David Rosón, Gabriel Direct observation of North Atlantic nutrient transport and biological pump variability linked to the Meridional Overturning Circulation |
topic_facet |
Earth and environmental science Ocean sciences Marine chemistry Physical oceanography |
description |
The ocean biological carbon pump (BCP) plays a pivotal role in the global carbon cycle. The BCP magnitude is determined by the fraction of nutrients utilised in biological production and remineralised at depth, with the remainder being subducted into the interior unused as ‘preformed’ nutrients. This fraction is currently around 50% and subject to the interaction of biological processes and global scale circulation. Consequently, changes in circulation can potentially impact biological carbon storage. Here we provide observational evidence that the reduction in the Atlantic Meridional Overturning Circulation (AMOC) that occurred over the 2004-2018 period has been accompanied by substantial changes in nutrient transports and associated carbon storage. Persistent southward net nutrient transport across 26.5°N exceeded nutrient sources, except by the end of the period when the system approached balance. This transient net loss of nutrients from the North Atlantic was accompanied by increases in the ratio of remineralized to preformed nutrients, indicating an increasing BCP efficiency (and carbon storage). Our results thus demonstrate observable transient changes in large scale nutrient transports linked to AMOC changes over interannual - decadal timescales, with implications for future ocean carbon storage. |
format |
Article in Journal/Newspaper |
author |
Carracedo, Lidia Mcdonagh, Elaine Sanders, Richard Moore, C. Mark Mercier, Herle Brown, Peter Torres-valdés, Sinhué Mawji, Edward Baringer, Molly Smeed, David Rosón, Gabriel |
author_facet |
Carracedo, Lidia Mcdonagh, Elaine Sanders, Richard Moore, C. Mark Mercier, Herle Brown, Peter Torres-valdés, Sinhué Mawji, Edward Baringer, Molly Smeed, David Rosón, Gabriel |
author_sort |
Carracedo, Lidia |
title |
Direct observation of North Atlantic nutrient transport and biological pump variability linked to the Meridional Overturning Circulation |
title_short |
Direct observation of North Atlantic nutrient transport and biological pump variability linked to the Meridional Overturning Circulation |
title_full |
Direct observation of North Atlantic nutrient transport and biological pump variability linked to the Meridional Overturning Circulation |
title_fullStr |
Direct observation of North Atlantic nutrient transport and biological pump variability linked to the Meridional Overturning Circulation |
title_full_unstemmed |
Direct observation of North Atlantic nutrient transport and biological pump variability linked to the Meridional Overturning Circulation |
title_sort |
direct observation of north atlantic nutrient transport and biological pump variability linked to the meridional overturning circulation |
publisher |
Research Square Platform LLC |
publishDate |
2024 |
url |
https://archimer.ifremer.fr/doc/00887/99842/109942.pdf https://doi.org/10.21203/rs.3.rs-4186952/v1 https://archimer.ifremer.fr/doc/00887/99842/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Preprint (Research Square Platform LLC), 2024-04-11 , P. 65p. |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/633211/EU//AtlantOS https://archimer.ifremer.fr/doc/00887/99842/109942.pdf doi:10.21203/rs.3.rs-4186952/v1 https://archimer.ifremer.fr/doc/00887/99842/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.21203/rs.3.rs-4186952/v1 |
_version_ |
1798850562799697920 |