Simulation of upper-ocean biogeochemistry with a flexible-composition phytoplankton model: C, N and Si cycling and Fe limitation in the Southern Ocean
International audience We previously reported the application of an upper-ocean biogeochemical model in which the elemental composition of the phytoplankton is flexible and responds to changes in light and nutrient availability [Mongin, M., Nelson, D., Pondaven, P., Brzezinski, M., Tréguer, P., 2003...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Main Authors: | , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2006
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Online Access: | https://hal.univ-brest.fr/hal-00635664 https://doi.org/10.1016/j.dsr2.2006.01.021 |
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Open Polar |
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Université de Bretagne Occidentale: HAL |
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ftunivbrest |
language |
English |
topic |
HNLC Fe Grazing Phytoplankton Elemental ratio Redfield ratio [SDE]Environmental Sciences |
spellingShingle |
HNLC Fe Grazing Phytoplankton Elemental ratio Redfield ratio [SDE]Environmental Sciences Mongin, Mathieu Nelson, David M Pondaven, Philippe Tréguer, Paul Simulation of upper-ocean biogeochemistry with a flexible-composition phytoplankton model: C, N and Si cycling and Fe limitation in the Southern Ocean |
topic_facet |
HNLC Fe Grazing Phytoplankton Elemental ratio Redfield ratio [SDE]Environmental Sciences |
description |
International audience We previously reported the application of an upper-ocean biogeochemical model in which the elemental composition of the phytoplankton is flexible and responds to changes in light and nutrient availability [Mongin, M., Nelson, D., Pondaven, P., Brzezinski, M., Tréguer, P., 2003. Simulation of upper-ocean biogeochemistry with a flexible-composition phytoplankton model: C, N and Si cycling in the western Sargasso Sea. Deep-Sea Research I 50, 1445-1480]. That model, applied in the western Sargasso Sea, considered the cycles of C, N and Si in the upper 400 m and limitation of phytoplankton growth by N, Si and light. We now report a new version of this model that includes Fe cycling and Fe limitation and its application in the Southern Ocean. The model includes two phytoplankton groups, diatoms and non-siliceous forms. Uptake of NO3− by phytoplankton is light dependent, but NH4+, Si(OH)4 and Fe uptake are not and can therefore continue through the night. The model tracks the resulting C/N and Fe/C ratios of both groups and Si/N ratio of diatoms, and permits uptake of C, N, Fe and Si to proceed independently when those ratios are close to those of nutrient-replete phytoplankton. When they indicate a deficiency cellular C, N, Fe or Si, uptake of the non-limiting elements is controlled by the content of the limiting element in accordance with the cell-quota formulation of [Droop, M., 1974. The nutrient status of algal cell in continuous culture. Journal of the Marine Biological Association of the United Kingdom 54, 825-855]. The model thus identifies the growth-limiting element and quantifies the degree of limitation from the elemental composition of the phytoplankton. We applied this model at the French KERFIX site in the Indian Ocean sector of the Southern Ocean, using meteorological forcing for that site from 1991 to 1995. As in the Sargasso Sea application, the flexible-composition structure provides simulations that are consistent with field data with only minimal tuning of model parameters. ... |
author2 |
Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) College of Oceanic and Atmospheric Sciences Corvallis Oregon State University (OSU) Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) National Science Foundation Grant #OCE-9911312 to Oregon State University. |
format |
Article in Journal/Newspaper |
author |
Mongin, Mathieu Nelson, David M Pondaven, Philippe Tréguer, Paul |
author_facet |
Mongin, Mathieu Nelson, David M Pondaven, Philippe Tréguer, Paul |
author_sort |
Mongin, Mathieu |
title |
Simulation of upper-ocean biogeochemistry with a flexible-composition phytoplankton model: C, N and Si cycling and Fe limitation in the Southern Ocean |
title_short |
Simulation of upper-ocean biogeochemistry with a flexible-composition phytoplankton model: C, N and Si cycling and Fe limitation in the Southern Ocean |
title_full |
Simulation of upper-ocean biogeochemistry with a flexible-composition phytoplankton model: C, N and Si cycling and Fe limitation in the Southern Ocean |
title_fullStr |
Simulation of upper-ocean biogeochemistry with a flexible-composition phytoplankton model: C, N and Si cycling and Fe limitation in the Southern Ocean |
title_full_unstemmed |
Simulation of upper-ocean biogeochemistry with a flexible-composition phytoplankton model: C, N and Si cycling and Fe limitation in the Southern Ocean |
title_sort |
simulation of upper-ocean biogeochemistry with a flexible-composition phytoplankton model: c, n and si cycling and fe limitation in the southern ocean |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.univ-brest.fr/hal-00635664 https://doi.org/10.1016/j.dsr2.2006.01.021 |
geographic |
Southern Ocean Indian |
geographic_facet |
Southern Ocean Indian |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.univ-brest.fr/hal-00635664 Deep Sea Research Part II: Topical Studies in Oceanography, 2006, 53 (5-7), pp.601-619. ⟨10.1016/j.dsr2.2006.01.021⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2006.01.021 hal-00635664 https://hal.univ-brest.fr/hal-00635664 doi:10.1016/j.dsr2.2006.01.021 |
op_doi |
https://doi.org/10.1016/j.dsr2.2006.01.021 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
53 |
container_issue |
5-7 |
container_start_page |
601 |
op_container_end_page |
619 |
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1790608418687418368 |
spelling |
ftunivbrest:oai:HAL:hal-00635664v1 2024-02-11T10:08:49+01:00 Simulation of upper-ocean biogeochemistry with a flexible-composition phytoplankton model: C, N and Si cycling and Fe limitation in the Southern Ocean Mongin, Mathieu Nelson, David M Pondaven, Philippe Tréguer, Paul Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) College of Oceanic and Atmospheric Sciences Corvallis Oregon State University (OSU) Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) National Science Foundation Grant #OCE-9911312 to Oregon State University. 2006-04-05 https://hal.univ-brest.fr/hal-00635664 https://doi.org/10.1016/j.dsr2.2006.01.021 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2006.01.021 hal-00635664 https://hal.univ-brest.fr/hal-00635664 doi:10.1016/j.dsr2.2006.01.021 ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.univ-brest.fr/hal-00635664 Deep Sea Research Part II: Topical Studies in Oceanography, 2006, 53 (5-7), pp.601-619. ⟨10.1016/j.dsr2.2006.01.021⟩ HNLC Fe Grazing Phytoplankton Elemental ratio Redfield ratio [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2006 ftunivbrest https://doi.org/10.1016/j.dsr2.2006.01.021 2024-01-23T23:36:42Z International audience We previously reported the application of an upper-ocean biogeochemical model in which the elemental composition of the phytoplankton is flexible and responds to changes in light and nutrient availability [Mongin, M., Nelson, D., Pondaven, P., Brzezinski, M., Tréguer, P., 2003. Simulation of upper-ocean biogeochemistry with a flexible-composition phytoplankton model: C, N and Si cycling in the western Sargasso Sea. Deep-Sea Research I 50, 1445-1480]. That model, applied in the western Sargasso Sea, considered the cycles of C, N and Si in the upper 400 m and limitation of phytoplankton growth by N, Si and light. We now report a new version of this model that includes Fe cycling and Fe limitation and its application in the Southern Ocean. The model includes two phytoplankton groups, diatoms and non-siliceous forms. Uptake of NO3− by phytoplankton is light dependent, but NH4+, Si(OH)4 and Fe uptake are not and can therefore continue through the night. The model tracks the resulting C/N and Fe/C ratios of both groups and Si/N ratio of diatoms, and permits uptake of C, N, Fe and Si to proceed independently when those ratios are close to those of nutrient-replete phytoplankton. When they indicate a deficiency cellular C, N, Fe or Si, uptake of the non-limiting elements is controlled by the content of the limiting element in accordance with the cell-quota formulation of [Droop, M., 1974. The nutrient status of algal cell in continuous culture. Journal of the Marine Biological Association of the United Kingdom 54, 825-855]. The model thus identifies the growth-limiting element and quantifies the degree of limitation from the elemental composition of the phytoplankton. We applied this model at the French KERFIX site in the Indian Ocean sector of the Southern Ocean, using meteorological forcing for that site from 1991 to 1995. As in the Sargasso Sea application, the flexible-composition structure provides simulations that are consistent with field data with only minimal tuning of model parameters. ... Article in Journal/Newspaper Southern Ocean Université de Bretagne Occidentale: HAL Southern Ocean Indian Deep Sea Research Part II: Topical Studies in Oceanography 53 5-7 601 619 |