Detection of Coccolithophore Blooms With BioGeoChemical‐Argo Floats
International audience Coccolithophores (calcifying phytoplankton) form extensive blooms in temperate and subpolar oceans as evidenced from ocean-color satellites. This study examines the potential to detect coccolithophore blooms with BioGeoChemical-Argo (BGC-Argo) floats, autonomous ocean profiler...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.archives-ouvertes.fr/hal-03099761 https://hal.archives-ouvertes.fr/hal-03099761/document https://hal.archives-ouvertes.fr/hal-03099761/file/2020GL090559.pdf https://doi.org/10.1029/2020GL090559 |
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ftccsdartic:oai:HAL:hal-03099761v1 2023-05-15T18:25:44+02:00 Detection of Coccolithophore Blooms With BioGeoChemical‐Argo Floats Terrats, L. Claustre, Hervé Cornec, M. Mangin, Alain Neukermans, G. ACRI ST, Nice, France 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) Universiteit Gent = Ghent University Belgium (UGENT) Flanders Marine Institute VLIZ 2020-12-16 https://hal.archives-ouvertes.fr/hal-03099761 https://hal.archives-ouvertes.fr/hal-03099761/document https://hal.archives-ouvertes.fr/hal-03099761/file/2020GL090559.pdf https://doi.org/10.1029/2020GL090559 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2020GL090559 hal-03099761 https://hal.archives-ouvertes.fr/hal-03099761 https://hal.archives-ouvertes.fr/hal-03099761/document https://hal.archives-ouvertes.fr/hal-03099761/file/2020GL090559.pdf doi:10.1029/2020GL090559 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess CC-BY-NC ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-03099761 Geophysical Research Letters, American Geophysical Union, 2020, 47 (23), ⟨10.1029/2020GL090559⟩ [SDE.BE]Environmental Sciences/Biodiversity and Ecology [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.1029/2020GL090559 2022-01-01T23:27:52Z International audience Coccolithophores (calcifying phytoplankton) form extensive blooms in temperate and subpolar oceans as evidenced from ocean-color satellites. This study examines the potential to detect coccolithophore blooms with BioGeoChemical-Argo (BGC-Argo) floats, autonomous ocean profilers equipped with bio-optical and physicochemical sensors. We first matched float data to ocean-color satellite data of calcite concentration to select floats that sampled coccolithophore blooms. We identified two floats in the Southern Ocean, which measured the particulate beam attenuation coefficient (c p) in addition to two core BGC-Argo variables, Chlorophyll-a concentration ([Chl-a]) and the particle backscattering coefficient (b bp). We show that coccolithophore blooms can be identified from floats by distinctively high values of (1) the b bp /c p ratio, a proxy for the refractive index of suspended particles, and (2) the b bp /[Chl-a] ratio, measurable by any BGC-Argo float. The latter thus paves the way to global investigations of environmental control of coccolithophore blooms and their role in carbon export. Plain Language Summary Coccolithophores are a group of phytoplankton that form an armor of calcite plates. Coccolithophores may form intense blooms which can be identified from space by so-called ocean-color satellites, providing global images of the color of the surface ocean. BioGeoChemical-Argo (BGC-Argo) floats, robots profiling down to 2,000 m with a variety of physicochemical and bio-optical sensors, present an increasingly attractive and cost-effective platform to study phytoplankton blooms and their impact on oceanic biogeochemical cycles. We show that coccolithophore blooms can be detected by BGC-Argo floats with high confidence, hence providing a new way to study them at the global scale as well as their role in sinking carbon. Article in Journal/Newspaper Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Southern Ocean Geophysical Research Letters 47 23 |
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.BE]Environmental Sciences/Biodiversity and Ecology [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] |
spellingShingle |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] Terrats, L. Claustre, Hervé Cornec, M. Mangin, Alain Neukermans, G. Detection of Coccolithophore Blooms With BioGeoChemical‐Argo Floats |
topic_facet |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] |
description |
International audience Coccolithophores (calcifying phytoplankton) form extensive blooms in temperate and subpolar oceans as evidenced from ocean-color satellites. This study examines the potential to detect coccolithophore blooms with BioGeoChemical-Argo (BGC-Argo) floats, autonomous ocean profilers equipped with bio-optical and physicochemical sensors. We first matched float data to ocean-color satellite data of calcite concentration to select floats that sampled coccolithophore blooms. We identified two floats in the Southern Ocean, which measured the particulate beam attenuation coefficient (c p) in addition to two core BGC-Argo variables, Chlorophyll-a concentration ([Chl-a]) and the particle backscattering coefficient (b bp). We show that coccolithophore blooms can be identified from floats by distinctively high values of (1) the b bp /c p ratio, a proxy for the refractive index of suspended particles, and (2) the b bp /[Chl-a] ratio, measurable by any BGC-Argo float. The latter thus paves the way to global investigations of environmental control of coccolithophore blooms and their role in carbon export. Plain Language Summary Coccolithophores are a group of phytoplankton that form an armor of calcite plates. Coccolithophores may form intense blooms which can be identified from space by so-called ocean-color satellites, providing global images of the color of the surface ocean. BioGeoChemical-Argo (BGC-Argo) floats, robots profiling down to 2,000 m with a variety of physicochemical and bio-optical sensors, present an increasingly attractive and cost-effective platform to study phytoplankton blooms and their impact on oceanic biogeochemical cycles. We show that coccolithophore blooms can be detected by BGC-Argo floats with high confidence, hence providing a new way to study them at the global scale as well as their role in sinking carbon. |
author2 |
ACRI ST, Nice, France 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) Universiteit Gent = Ghent University Belgium (UGENT) Flanders Marine Institute VLIZ |
format |
Article in Journal/Newspaper |
author |
Terrats, L. Claustre, Hervé Cornec, M. Mangin, Alain Neukermans, G. |
author_facet |
Terrats, L. Claustre, Hervé Cornec, M. Mangin, Alain Neukermans, G. |
author_sort |
Terrats, L. |
title |
Detection of Coccolithophore Blooms With BioGeoChemical‐Argo Floats |
title_short |
Detection of Coccolithophore Blooms With BioGeoChemical‐Argo Floats |
title_full |
Detection of Coccolithophore Blooms With BioGeoChemical‐Argo Floats |
title_fullStr |
Detection of Coccolithophore Blooms With BioGeoChemical‐Argo Floats |
title_full_unstemmed |
Detection of Coccolithophore Blooms With BioGeoChemical‐Argo Floats |
title_sort |
detection of coccolithophore blooms with biogeochemical‐argo floats |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-03099761 https://hal.archives-ouvertes.fr/hal-03099761/document https://hal.archives-ouvertes.fr/hal-03099761/file/2020GL090559.pdf https://doi.org/10.1029/2020GL090559 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-03099761 Geophysical Research Letters, American Geophysical Union, 2020, 47 (23), ⟨10.1029/2020GL090559⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2020GL090559 hal-03099761 https://hal.archives-ouvertes.fr/hal-03099761 https://hal.archives-ouvertes.fr/hal-03099761/document https://hal.archives-ouvertes.fr/hal-03099761/file/2020GL090559.pdf doi:10.1029/2020GL090559 |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1029/2020GL090559 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
23 |
_version_ |
1766207365257887744 |