Biogeochemical‐Argo floats show that chlorophyll increases before carbon in the high‐latitude Southern Ocean spring bloom
Abstract In the Southern Ocean, phytoplankton blooms are an annually recurring prominent feature that play a significant role in ocean CO2 uptake. Understanding the timing of the phytoplankton bloom is necessary to provide insights into the underlying physiological drivers, for the study of ecosyste...
Published in: | Limnology and Oceanography Letters |
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Online Access: | https://doi.org/10.1002/lol2.10322 https://doaj.org/article/c58f7856dc784a36a28ace11552f86ac |
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ftdoajarticles:oai:doaj.org/article:c58f7856dc784a36a28ace11552f86ac 2024-09-15T18:37:02+00:00 Biogeochemical‐Argo floats show that chlorophyll increases before carbon in the high‐latitude Southern Ocean spring bloom Clara R. Vives Christina Schallenberg Peter G. Strutton Philip W. Boyd 2024-06-01T00:00:00Z https://doi.org/10.1002/lol2.10322 https://doaj.org/article/c58f7856dc784a36a28ace11552f86ac EN eng Wiley https://doi.org/10.1002/lol2.10322 https://doaj.org/toc/2378-2242 2378-2242 doi:10.1002/lol2.10322 https://doaj.org/article/c58f7856dc784a36a28ace11552f86ac Limnology and Oceanography Letters, Vol 9, Iss 3, Pp 172-182 (2024) Oceanography GC1-1581 article 2024 ftdoajarticles https://doi.org/10.1002/lol2.10322 2024-08-05T17:49:19Z Abstract In the Southern Ocean, phytoplankton blooms are an annually recurring prominent feature that play a significant role in ocean CO2 uptake. Understanding the timing of the phytoplankton bloom is necessary to provide insights into the underlying physiological drivers, for the study of ecosystem dynamics and consequent patterns in downward carbon export. Previous studies have used chlorophyll (chl) and particulate organic carbon, from either satellites or biogeochemical‐Argo (BGC‐Argo) floats, to investigate bloom phenology, but provide inconsistent findings regarding bloom timing. Here, we compare bloom dynamics based on three diagnostics from 7114 BGC‐Argo float profiles, south of 60°S. Bloom onset consistently occurs earlier when calculated using chl than when based on phytoplankton carbon or nitrate uptake, and the decoupling increases with latitude. This suggests that phytoplankton synthesize increased chl to acclimate to low‐light conditions, before increasing their biomass. These results highlight the importance of considering phytoplankton physiology when choosing proxies for phytoplankton growth. Article in Journal/Newspaper Southern Ocean Directory of Open Access Journals: DOAJ Articles Limnology and Oceanography Letters 9 3 172 182 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Oceanography GC1-1581 |
spellingShingle |
Oceanography GC1-1581 Clara R. Vives Christina Schallenberg Peter G. Strutton Philip W. Boyd Biogeochemical‐Argo floats show that chlorophyll increases before carbon in the high‐latitude Southern Ocean spring bloom |
topic_facet |
Oceanography GC1-1581 |
description |
Abstract In the Southern Ocean, phytoplankton blooms are an annually recurring prominent feature that play a significant role in ocean CO2 uptake. Understanding the timing of the phytoplankton bloom is necessary to provide insights into the underlying physiological drivers, for the study of ecosystem dynamics and consequent patterns in downward carbon export. Previous studies have used chlorophyll (chl) and particulate organic carbon, from either satellites or biogeochemical‐Argo (BGC‐Argo) floats, to investigate bloom phenology, but provide inconsistent findings regarding bloom timing. Here, we compare bloom dynamics based on three diagnostics from 7114 BGC‐Argo float profiles, south of 60°S. Bloom onset consistently occurs earlier when calculated using chl than when based on phytoplankton carbon or nitrate uptake, and the decoupling increases with latitude. This suggests that phytoplankton synthesize increased chl to acclimate to low‐light conditions, before increasing their biomass. These results highlight the importance of considering phytoplankton physiology when choosing proxies for phytoplankton growth. |
format |
Article in Journal/Newspaper |
author |
Clara R. Vives Christina Schallenberg Peter G. Strutton Philip W. Boyd |
author_facet |
Clara R. Vives Christina Schallenberg Peter G. Strutton Philip W. Boyd |
author_sort |
Clara R. Vives |
title |
Biogeochemical‐Argo floats show that chlorophyll increases before carbon in the high‐latitude Southern Ocean spring bloom |
title_short |
Biogeochemical‐Argo floats show that chlorophyll increases before carbon in the high‐latitude Southern Ocean spring bloom |
title_full |
Biogeochemical‐Argo floats show that chlorophyll increases before carbon in the high‐latitude Southern Ocean spring bloom |
title_fullStr |
Biogeochemical‐Argo floats show that chlorophyll increases before carbon in the high‐latitude Southern Ocean spring bloom |
title_full_unstemmed |
Biogeochemical‐Argo floats show that chlorophyll increases before carbon in the high‐latitude Southern Ocean spring bloom |
title_sort |
biogeochemical‐argo floats show that chlorophyll increases before carbon in the high‐latitude southern ocean spring bloom |
publisher |
Wiley |
publishDate |
2024 |
url |
https://doi.org/10.1002/lol2.10322 https://doaj.org/article/c58f7856dc784a36a28ace11552f86ac |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Limnology and Oceanography Letters, Vol 9, Iss 3, Pp 172-182 (2024) |
op_relation |
https://doi.org/10.1002/lol2.10322 https://doaj.org/toc/2378-2242 2378-2242 doi:10.1002/lol2.10322 https://doaj.org/article/c58f7856dc784a36a28ace11552f86ac |
op_doi |
https://doi.org/10.1002/lol2.10322 |
container_title |
Limnology and Oceanography Letters |
container_volume |
9 |
container_issue |
3 |
container_start_page |
172 |
op_container_end_page |
182 |
_version_ |
1810481279345360896 |