Sensitivity of sea-to-air CO 2 flux to ecosystem parameters from an adjoint model
International audience An adjoint model is applied to examine the biophysical factors that control surface pCO 2 in different ocean regions. In the tropical Atlantic and Indian Oceans, the annual cycle of pCO 2 in the model is highly dominated by temperature variability, whereas both the temperature...
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ftccsdartic:oai:HAL:hal-00297687v1 2023-11-12T04:22:02+01:00 Sensitivity of sea-to-air CO 2 flux to ecosystem parameters from an adjoint model Tjiputra, J. F. Winguth, A. M. E. Department of Atmospheric Oceanic and Space Sciences Madison University of Wisconsin-Madison Department of Earth and Environmental Sciences Arlington University of Texas at Arlington Arlington 2008-04-25 https://hal.science/hal-00297687 https://hal.science/hal-00297687/document https://hal.science/hal-00297687/file/bg-5-615-2008.pdf en eng HAL CCSD European Geosciences Union hal-00297687 https://hal.science/hal-00297687 https://hal.science/hal-00297687/document https://hal.science/hal-00297687/file/bg-5-615-2008.pdf info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-00297687 Biogeosciences, 2008, 5 (2), pp.615-630 [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2008 ftccsdartic 2023-10-21T23:15:52Z International audience An adjoint model is applied to examine the biophysical factors that control surface pCO 2 in different ocean regions. In the tropical Atlantic and Indian Oceans, the annual cycle of pCO 2 in the model is highly dominated by temperature variability, whereas both the temperature and dissolved inorganic carbon (DIC) are important in the tropical Pacific. In the high-latitude North Atlantic and Southern Oceans, DIC variability mainly drives the annual cycle of surface pCO 2 . Phosphate addition significantly increases the carbon uptake in the tropical and subtropical regions, whereas nitrate addition increases the carbon uptake in the subarctic Pacific Ocean. The carbon uptake is also sensitive to changes in the physiological rate parameters in the ecosystem model in the equatorial Pacific, North Pacific, North Atlantic, and the Southern Ocean. Zooplankton grazing plays a major role in carbon exchange, especially in the HNLC regions. The grazing parameter regulates the phytoplankton biomass at the surface, thus controlling the biological production and the carbon uptake by photosynthesis. In the oligotrophic subtropical regions, the sea-to-air CO 2 flux is sensitive to changes in the phytoplankton exudation rate by altering the flux of regenerated nutrients essential for photosynthesis. Article in Journal/Newspaper North Atlantic Southern Ocean Subarctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Southern Ocean Pacific Indian |
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 |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Tjiputra, J. F. Winguth, A. M. E. Sensitivity of sea-to-air CO 2 flux to ecosystem parameters from an adjoint model |
topic_facet |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience An adjoint model is applied to examine the biophysical factors that control surface pCO 2 in different ocean regions. In the tropical Atlantic and Indian Oceans, the annual cycle of pCO 2 in the model is highly dominated by temperature variability, whereas both the temperature and dissolved inorganic carbon (DIC) are important in the tropical Pacific. In the high-latitude North Atlantic and Southern Oceans, DIC variability mainly drives the annual cycle of surface pCO 2 . Phosphate addition significantly increases the carbon uptake in the tropical and subtropical regions, whereas nitrate addition increases the carbon uptake in the subarctic Pacific Ocean. The carbon uptake is also sensitive to changes in the physiological rate parameters in the ecosystem model in the equatorial Pacific, North Pacific, North Atlantic, and the Southern Ocean. Zooplankton grazing plays a major role in carbon exchange, especially in the HNLC regions. The grazing parameter regulates the phytoplankton biomass at the surface, thus controlling the biological production and the carbon uptake by photosynthesis. In the oligotrophic subtropical regions, the sea-to-air CO 2 flux is sensitive to changes in the phytoplankton exudation rate by altering the flux of regenerated nutrients essential for photosynthesis. |
author2 |
Department of Atmospheric Oceanic and Space Sciences Madison University of Wisconsin-Madison Department of Earth and Environmental Sciences Arlington University of Texas at Arlington Arlington |
format |
Article in Journal/Newspaper |
author |
Tjiputra, J. F. Winguth, A. M. E. |
author_facet |
Tjiputra, J. F. Winguth, A. M. E. |
author_sort |
Tjiputra, J. F. |
title |
Sensitivity of sea-to-air CO 2 flux to ecosystem parameters from an adjoint model |
title_short |
Sensitivity of sea-to-air CO 2 flux to ecosystem parameters from an adjoint model |
title_full |
Sensitivity of sea-to-air CO 2 flux to ecosystem parameters from an adjoint model |
title_fullStr |
Sensitivity of sea-to-air CO 2 flux to ecosystem parameters from an adjoint model |
title_full_unstemmed |
Sensitivity of sea-to-air CO 2 flux to ecosystem parameters from an adjoint model |
title_sort |
sensitivity of sea-to-air co 2 flux to ecosystem parameters from an adjoint model |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-00297687 https://hal.science/hal-00297687/document https://hal.science/hal-00297687/file/bg-5-615-2008.pdf |
geographic |
Southern Ocean Pacific Indian |
geographic_facet |
Southern Ocean Pacific Indian |
genre |
North Atlantic Southern Ocean Subarctic |
genre_facet |
North Atlantic Southern Ocean Subarctic |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-00297687 Biogeosciences, 2008, 5 (2), pp.615-630 |
op_relation |
hal-00297687 https://hal.science/hal-00297687 https://hal.science/hal-00297687/document https://hal.science/hal-00297687/file/bg-5-615-2008.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782337215329730560 |