Improving the dynamics of a coupled physical-biogeochemical model of the North Atlantic basin through data assimilation : impact on biological tracers
Several studies on coupled physical–biogeochemical models have shown that major deficiencies in the biogeochemical fieldsarise from the deficiencies in the physical flow fields. This paper examines the improvement of the physics through dataassimilation, and the subsequent impact on the ecosystem re...
Published in: | Journal of Marine Systems |
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Online Access: | https://hal.science/hal-00220480 https://hal.science/hal-00220480/document https://hal.science/hal-00220480/file/ber06.pdf https://doi.org/10.1016/j.jmarsys.2006.03.007 |
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ftunigrenoble:oai:HAL:hal-00220480v1 2024-05-12T08:07:48+00:00 Improving the dynamics of a coupled physical-biogeochemical model of the North Atlantic basin through data assimilation : impact on biological tracers Berline, L. Brankart, Jean-Michel Brasseur, Pierre Ourmieres, Yann Verron, Jacques Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) 2006 https://hal.science/hal-00220480 https://hal.science/hal-00220480/document https://hal.science/hal-00220480/file/ber06.pdf https://doi.org/10.1016/j.jmarsys.2006.03.007 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2006.03.007 hal-00220480 https://hal.science/hal-00220480 https://hal.science/hal-00220480/document https://hal.science/hal-00220480/file/ber06.pdf doi:10.1016/j.jmarsys.2006.03.007 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0924-7963 Journal of Marine Systems https://hal.science/hal-00220480 Journal of Marine Systems, 2006, 64 (1-4), pp.153-172. ⟨10.1016/j.jmarsys.2006.03.007⟩ Biogeochemical model Physical-biological interactions Data assimilation SEEK filter Mesoscale processes Nutrient supply North Atlantic [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2006 ftunigrenoble https://doi.org/10.1016/j.jmarsys.2006.03.007 2024-04-18T03:36:08Z Several studies on coupled physical–biogeochemical models have shown that major deficiencies in the biogeochemical fieldsarise from the deficiencies in the physical flow fields. This paper examines the improvement of the physics through dataassimilation, and the subsequent impact on the ecosystem response in a coupled model of the North Atlantic. Sea surfacetemperature and sea surface height data are assimilated with a sequential method based on the SEEK filter adapted to the couplingneeds. The model domain covers the Atlantic from 20°S to 70°N at eddy-permitting resolution. The biogeochemical model is aNPZD-DOM model based on the P3ZD formulation. The results of an annual assimilated simulation are compared with an annualfree simulation.With assimilation, the representation of the mixed layer depth is significantly improved in mid latitudes, even though the mixedlayer depth is generally overestimated compared to the observations. The representation of the mean and variance of the currents isalso significantly improved.The nutrient input in the euphotic zone is used to assess the data assimilation impact on the ecosystem. Data assimilation resultsin a 50% reduction of the input due to vertical mixing in mid-latitudes, and in a four- to six-fold increase of the advective fluxes inmid-latitudes and subtropics. Averaged zonally, the net impact is a threefold increase for the subtropical gyre, and a moderate (20–30%) decrease at mid and high latitudes.Surface chlorophyll concentration increases along the subtropical gyre borders, but little changes are detected at mid and highlatitudes. An increase of the primary production appears along the Gulf Stream path, but it represents only 12% on average for midand high latitudes. In the subtropical gyre centre, primary production is augmented but stays underestimated (20% of observations).These experiments show the benefits of physical data assimilation in coupled physical–biogeochemical applications. Article in Journal/Newspaper North Atlantic Université Grenoble Alpes: HAL Journal of Marine Systems 64 1-4 153 172 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
Biogeochemical model Physical-biological interactions Data assimilation SEEK filter Mesoscale processes Nutrient supply North Atlantic [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
spellingShingle |
Biogeochemical model Physical-biological interactions Data assimilation SEEK filter Mesoscale processes Nutrient supply North Atlantic [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Berline, L. Brankart, Jean-Michel Brasseur, Pierre Ourmieres, Yann Verron, Jacques Improving the dynamics of a coupled physical-biogeochemical model of the North Atlantic basin through data assimilation : impact on biological tracers |
topic_facet |
Biogeochemical model Physical-biological interactions Data assimilation SEEK filter Mesoscale processes Nutrient supply North Atlantic [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
Several studies on coupled physical–biogeochemical models have shown that major deficiencies in the biogeochemical fieldsarise from the deficiencies in the physical flow fields. This paper examines the improvement of the physics through dataassimilation, and the subsequent impact on the ecosystem response in a coupled model of the North Atlantic. Sea surfacetemperature and sea surface height data are assimilated with a sequential method based on the SEEK filter adapted to the couplingneeds. The model domain covers the Atlantic from 20°S to 70°N at eddy-permitting resolution. The biogeochemical model is aNPZD-DOM model based on the P3ZD formulation. The results of an annual assimilated simulation are compared with an annualfree simulation.With assimilation, the representation of the mixed layer depth is significantly improved in mid latitudes, even though the mixedlayer depth is generally overestimated compared to the observations. The representation of the mean and variance of the currents isalso significantly improved.The nutrient input in the euphotic zone is used to assess the data assimilation impact on the ecosystem. Data assimilation resultsin a 50% reduction of the input due to vertical mixing in mid-latitudes, and in a four- to six-fold increase of the advective fluxes inmid-latitudes and subtropics. Averaged zonally, the net impact is a threefold increase for the subtropical gyre, and a moderate (20–30%) decrease at mid and high latitudes.Surface chlorophyll concentration increases along the subtropical gyre borders, but little changes are detected at mid and highlatitudes. An increase of the primary production appears along the Gulf Stream path, but it represents only 12% on average for midand high latitudes. In the subtropical gyre centre, primary production is augmented but stays underestimated (20% of observations).These experiments show the benefits of physical data assimilation in coupled physical–biogeochemical applications. |
author2 |
Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Berline, L. Brankart, Jean-Michel Brasseur, Pierre Ourmieres, Yann Verron, Jacques |
author_facet |
Berline, L. Brankart, Jean-Michel Brasseur, Pierre Ourmieres, Yann Verron, Jacques |
author_sort |
Berline, L. |
title |
Improving the dynamics of a coupled physical-biogeochemical model of the North Atlantic basin through data assimilation : impact on biological tracers |
title_short |
Improving the dynamics of a coupled physical-biogeochemical model of the North Atlantic basin through data assimilation : impact on biological tracers |
title_full |
Improving the dynamics of a coupled physical-biogeochemical model of the North Atlantic basin through data assimilation : impact on biological tracers |
title_fullStr |
Improving the dynamics of a coupled physical-biogeochemical model of the North Atlantic basin through data assimilation : impact on biological tracers |
title_full_unstemmed |
Improving the dynamics of a coupled physical-biogeochemical model of the North Atlantic basin through data assimilation : impact on biological tracers |
title_sort |
improving the dynamics of a coupled physical-biogeochemical model of the north atlantic basin through data assimilation : impact on biological tracers |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00220480 https://hal.science/hal-00220480/document https://hal.science/hal-00220480/file/ber06.pdf https://doi.org/10.1016/j.jmarsys.2006.03.007 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0924-7963 Journal of Marine Systems https://hal.science/hal-00220480 Journal of Marine Systems, 2006, 64 (1-4), pp.153-172. ⟨10.1016/j.jmarsys.2006.03.007⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2006.03.007 hal-00220480 https://hal.science/hal-00220480 https://hal.science/hal-00220480/document https://hal.science/hal-00220480/file/ber06.pdf doi:10.1016/j.jmarsys.2006.03.007 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.jmarsys.2006.03.007 |
container_title |
Journal of Marine Systems |
container_volume |
64 |
container_issue |
1-4 |
container_start_page |
153 |
op_container_end_page |
172 |
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1798850599800799232 |