Sources of variability in the column photosynthetic cross section for Antarctic coastal waters
International audience Using a highly resolved Long Term Ecological Research (LTER) database collected near Palmer Station, Antarctica, from 1991 to 1994, the variability in the column photosynthetic cross section (Psi*, m(2) g Chl a(-1)) was analyzed. The relationship between the daily integrated p...
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ftsorbonneuniv:oai:HAL:hal-03284946v1 2024-09-15T17:41:55+00:00 Sources of variability in the column photosynthetic cross section for Antarctic coastal waters Claustre, Hervé Moline, Ma Prezelin, Bb 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) 1997 https://hal.science/hal-03284946 https://hal.science/hal-03284946/document https://hal.science/hal-03284946/file/96JC02439.pdf https://doi.org/10.1029/96JC02439 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/96JC02439 hal-03284946 https://hal.science/hal-03284946 https://hal.science/hal-03284946/document https://hal.science/hal-03284946/file/96JC02439.pdf doi:10.1029/96JC02439 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-03284946 Journal of Geophysical Research. Oceans, 1997, 102 (C11), pp.25047-25060. ⟨10.1029/96JC02439⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 1997 ftsorbonneuniv https://doi.org/10.1029/96JC02439 2024-07-25T23:47:54Z International audience Using a highly resolved Long Term Ecological Research (LTER) database collected near Palmer Station, Antarctica, from 1991 to 1994, the variability in the column photosynthetic cross section (Psi*, m(2) g Chl a(-1)) was analyzed. The relationship between the daily integrated primary production rates versus the product of surface irradiance (Q(PAR)(O-2(+)) and the integrated chlorophyll content (down to 0.1% Q(PAR)(0(+)) gave a Psi* value of 0.0695 m(2) g Chl a(-1) (r(2) = 0.85, p < 0.001, n = 151) which is similar to those determined for temperate and tropical seas. However, the average value of single Psi* estimates is higher (0.109 +/- 0.075 m(2) g Chl a(-1)) with extreme values extending over a fiftyfold range (0.009-0.488 m g Chi a(-1)). The possible drivers of this variability are analyzed in detail, considering variables which are presently used in biooptical models (e.g., surface irradiance and chlorophyll content) and those which are not (taxonomic composition). A sixfold variation in Psi* was observed with time of year and strongly associated with the high seasonality in incident irradiance characteristic of these polar sampling sites. Variability in daily incident irradiance as influenced by cloudiness and variation in chlorophyll content were responsible for an additional twofold variation in Psi*. Finally, the taxonomic dependency of Psi* was demonstrated for the first time. For identical chlorophyll content and surface irradiance, mean Psi* values of 0.114 +/- 0.051 m(2) g Chl a(-1) were recorded for diatom blooms and 0.053 +/- 0.011 m(2) g Chi a(-1) for cryptophyte-dominated populations. Results illustrate the validity of Psi*-based approaches for estimating primary production for the Southern Ocean but emphasize the need to address taxon-specific photophysiology to better estimate primary production on smaller spatio-temporal scales. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean HAL Sorbonne Université Journal of Geophysical Research: Oceans 102 C11 25047 25060 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Claustre, Hervé Moline, Ma Prezelin, Bb Sources of variability in the column photosynthetic cross section for Antarctic coastal waters |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Using a highly resolved Long Term Ecological Research (LTER) database collected near Palmer Station, Antarctica, from 1991 to 1994, the variability in the column photosynthetic cross section (Psi*, m(2) g Chl a(-1)) was analyzed. The relationship between the daily integrated primary production rates versus the product of surface irradiance (Q(PAR)(O-2(+)) and the integrated chlorophyll content (down to 0.1% Q(PAR)(0(+)) gave a Psi* value of 0.0695 m(2) g Chl a(-1) (r(2) = 0.85, p < 0.001, n = 151) which is similar to those determined for temperate and tropical seas. However, the average value of single Psi* estimates is higher (0.109 +/- 0.075 m(2) g Chl a(-1)) with extreme values extending over a fiftyfold range (0.009-0.488 m g Chi a(-1)). The possible drivers of this variability are analyzed in detail, considering variables which are presently used in biooptical models (e.g., surface irradiance and chlorophyll content) and those which are not (taxonomic composition). A sixfold variation in Psi* was observed with time of year and strongly associated with the high seasonality in incident irradiance characteristic of these polar sampling sites. Variability in daily incident irradiance as influenced by cloudiness and variation in chlorophyll content were responsible for an additional twofold variation in Psi*. Finally, the taxonomic dependency of Psi* was demonstrated for the first time. For identical chlorophyll content and surface irradiance, mean Psi* values of 0.114 +/- 0.051 m(2) g Chl a(-1) were recorded for diatom blooms and 0.053 +/- 0.011 m(2) g Chi a(-1) for cryptophyte-dominated populations. Results illustrate the validity of Psi*-based approaches for estimating primary production for the Southern Ocean but emphasize the need to address taxon-specific photophysiology to better estimate primary production on smaller spatio-temporal scales. |
author2 |
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 |
Claustre, Hervé Moline, Ma Prezelin, Bb |
author_facet |
Claustre, Hervé Moline, Ma Prezelin, Bb |
author_sort |
Claustre, Hervé |
title |
Sources of variability in the column photosynthetic cross section for Antarctic coastal waters |
title_short |
Sources of variability in the column photosynthetic cross section for Antarctic coastal waters |
title_full |
Sources of variability in the column photosynthetic cross section for Antarctic coastal waters |
title_fullStr |
Sources of variability in the column photosynthetic cross section for Antarctic coastal waters |
title_full_unstemmed |
Sources of variability in the column photosynthetic cross section for Antarctic coastal waters |
title_sort |
sources of variability in the column photosynthetic cross section for antarctic coastal waters |
publisher |
HAL CCSD |
publishDate |
1997 |
url |
https://hal.science/hal-03284946 https://hal.science/hal-03284946/document https://hal.science/hal-03284946/file/96JC02439.pdf https://doi.org/10.1029/96JC02439 |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-03284946 Journal of Geophysical Research. Oceans, 1997, 102 (C11), pp.25047-25060. ⟨10.1029/96JC02439⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/96JC02439 hal-03284946 https://hal.science/hal-03284946 https://hal.science/hal-03284946/document https://hal.science/hal-03284946/file/96JC02439.pdf doi:10.1029/96JC02439 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/96JC02439 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
102 |
container_issue |
C11 |
container_start_page |
25047 |
op_container_end_page |
25060 |
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1810488200387362816 |