High latitude Southern Ocean phytoplankton have distinctive bio-optical properties
Studying the biogeochemistry of the Southern Ocean using remote sensing relies on accurate interpretation of ocean colour through bio-optical and biogeochemical relationships between quantities and properties of interest. During the Antarctic Circumnavigation Expedition of the 2016/2017 Austral Summ...
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Online Access: | https://hal.science/hal-03955997 https://hal.science/hal-03955997/document https://hal.science/hal-03955997/file/oe-29-14-21084.pdf https://doi.org/10.1364/OE.426737 |
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ftccsdartic:oai:HAL:hal-03955997v1 2024-01-21T10:01:24+01:00 High latitude Southern Ocean phytoplankton have distinctive bio-optical properties Robinson, Charlotte Huot, Yannick Schuback, Nina Ryan-Keogh, Thomas Thomalla, Sandy Antoine, David Département de géomatique appliquée Sherbrooke (UdeS) Université de Sherbrooke (UdeS) Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2021 https://hal.science/hal-03955997 https://hal.science/hal-03955997/document https://hal.science/hal-03955997/file/oe-29-14-21084.pdf https://doi.org/10.1364/OE.426737 en eng HAL CCSD Optical Society of America - OSA Publishing info:eu-repo/semantics/altIdentifier/doi/10.1364/OE.426737 hal-03955997 https://hal.science/hal-03955997 https://hal.science/hal-03955997/document https://hal.science/hal-03955997/file/oe-29-14-21084.pdf doi:10.1364/OE.426737 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1094-4087 Optics Express https://hal.science/hal-03955997 Optics Express, 2021, 29 (14), pp.21084. ⟨10.1364/OE.426737⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.1364/OE.426737 2023-12-23T23:30:17Z Studying the biogeochemistry of the Southern Ocean using remote sensing relies on accurate interpretation of ocean colour through bio-optical and biogeochemical relationships between quantities and properties of interest. During the Antarctic Circumnavigation Expedition of the 2016/2017 Austral Summer, we collected a spatially comprehensive dataset of phytoplankton pigment concentrations, particulate absorption and particle size distribution and compared simple bio-optical and particle property relationships as a function of chlorophyll a . Similar to previous studies we find that the chlorophyll-specific phytoplankton absorption coefficient is significantly lower than in other oceans at comparable chlorophyll concentrations. This appears to be driven in part by lower concentrations of accessory pigments per unit chlorophyll a as well as increased pigment packaging due to relatively larger sized phytoplankton at low chlorophyll a than is typically observed in other oceans. We find that the contribution of microphytoplankton (>20 µ m size) to chlorophyll a estimates of phytoplankton biomass is significantly higher than expected for the given chlorophyll a concentration, especially in higher latitudes south of the Southern Antarctic Circumpolar Current Front. Phytoplankton pigments are more packaged in larger cells, which resulted in a flattening of phytoplankton spectra as measured in these samples when compared to other ocean regions with similar chlorophyll a concentration. Additionally, we find that at high latitude locations in the Southern Ocean, pheopigment concentrations can exceed mono-vinyl chlorophyll a concentrations. Finally, we observed very different relationships between particle volume and chlorophyll a concentrations in high and low latitude Southern Ocean waters, driven by differences in phytoplankton community composition and acclimation to environmental conditions and varying contribution of non-algal particles to the particulate matter. Our data confirm that, as previously suggested, the ... Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Austral Southern Ocean The Antarctic Optics Express 29 14 21084 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Robinson, Charlotte Huot, Yannick Schuback, Nina Ryan-Keogh, Thomas Thomalla, Sandy Antoine, David High latitude Southern Ocean phytoplankton have distinctive bio-optical properties |
topic_facet |
[SDE]Environmental Sciences |
description |
Studying the biogeochemistry of the Southern Ocean using remote sensing relies on accurate interpretation of ocean colour through bio-optical and biogeochemical relationships between quantities and properties of interest. During the Antarctic Circumnavigation Expedition of the 2016/2017 Austral Summer, we collected a spatially comprehensive dataset of phytoplankton pigment concentrations, particulate absorption and particle size distribution and compared simple bio-optical and particle property relationships as a function of chlorophyll a . Similar to previous studies we find that the chlorophyll-specific phytoplankton absorption coefficient is significantly lower than in other oceans at comparable chlorophyll concentrations. This appears to be driven in part by lower concentrations of accessory pigments per unit chlorophyll a as well as increased pigment packaging due to relatively larger sized phytoplankton at low chlorophyll a than is typically observed in other oceans. We find that the contribution of microphytoplankton (>20 µ m size) to chlorophyll a estimates of phytoplankton biomass is significantly higher than expected for the given chlorophyll a concentration, especially in higher latitudes south of the Southern Antarctic Circumpolar Current Front. Phytoplankton pigments are more packaged in larger cells, which resulted in a flattening of phytoplankton spectra as measured in these samples when compared to other ocean regions with similar chlorophyll a concentration. Additionally, we find that at high latitude locations in the Southern Ocean, pheopigment concentrations can exceed mono-vinyl chlorophyll a concentrations. Finally, we observed very different relationships between particle volume and chlorophyll a concentrations in high and low latitude Southern Ocean waters, driven by differences in phytoplankton community composition and acclimation to environmental conditions and varying contribution of non-algal particles to the particulate matter. Our data confirm that, as previously suggested, the ... |
author2 |
Département de géomatique appliquée Sherbrooke (UdeS) Université de Sherbrooke (UdeS) Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Robinson, Charlotte Huot, Yannick Schuback, Nina Ryan-Keogh, Thomas Thomalla, Sandy Antoine, David |
author_facet |
Robinson, Charlotte Huot, Yannick Schuback, Nina Ryan-Keogh, Thomas Thomalla, Sandy Antoine, David |
author_sort |
Robinson, Charlotte |
title |
High latitude Southern Ocean phytoplankton have distinctive bio-optical properties |
title_short |
High latitude Southern Ocean phytoplankton have distinctive bio-optical properties |
title_full |
High latitude Southern Ocean phytoplankton have distinctive bio-optical properties |
title_fullStr |
High latitude Southern Ocean phytoplankton have distinctive bio-optical properties |
title_full_unstemmed |
High latitude Southern Ocean phytoplankton have distinctive bio-optical properties |
title_sort |
high latitude southern ocean phytoplankton have distinctive bio-optical properties |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03955997 https://hal.science/hal-03955997/document https://hal.science/hal-03955997/file/oe-29-14-21084.pdf https://doi.org/10.1364/OE.426737 |
geographic |
Antarctic Austral Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
ISSN: 1094-4087 Optics Express https://hal.science/hal-03955997 Optics Express, 2021, 29 (14), pp.21084. ⟨10.1364/OE.426737⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1364/OE.426737 hal-03955997 https://hal.science/hal-03955997 https://hal.science/hal-03955997/document https://hal.science/hal-03955997/file/oe-29-14-21084.pdf doi:10.1364/OE.426737 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1364/OE.426737 |
container_title |
Optics Express |
container_volume |
29 |
container_issue |
14 |
container_start_page |
21084 |
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1788691296426131456 |