Sensitivity of sea-to-air CO 2 flux to ecosystem parameters from an adjoint model
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 inorgani...
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ftdoajarticles:oai:doaj.org/article:d9c2bd25c18b4c0997e533e9ff7c007c 2023-05-15T17:30:35+02:00 Sensitivity of sea-to-air CO 2 flux to ecosystem parameters from an adjoint model A. M. E. Winguth J. F. Tjiputra 2008-04-01T00:00:00Z https://doaj.org/article/d9c2bd25c18b4c0997e533e9ff7c007c EN eng Copernicus Publications http://www.biogeosciences.net/5/615/2008/bg-5-615-2008.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/d9c2bd25c18b4c0997e533e9ff7c007c Biogeosciences, Vol 5, Iss 2, Pp 615-630 (2008) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2008 ftdoajarticles 2022-12-31T08:44:28Z 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 Directory of Open Access Journals: DOAJ Articles Indian Pacific Southern Ocean |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 A. M. E. Winguth J. F. Tjiputra Sensitivity of sea-to-air CO 2 flux to ecosystem parameters from an adjoint model |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
A. M. E. Winguth J. F. Tjiputra |
author_facet |
A. M. E. Winguth J. F. Tjiputra |
author_sort |
A. M. E. Winguth |
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 |
Copernicus Publications |
publishDate |
2008 |
url |
https://doaj.org/article/d9c2bd25c18b4c0997e533e9ff7c007c |
geographic |
Indian Pacific Southern Ocean |
geographic_facet |
Indian Pacific Southern Ocean |
genre |
North Atlantic Southern Ocean Subarctic |
genre_facet |
North Atlantic Southern Ocean Subarctic |
op_source |
Biogeosciences, Vol 5, Iss 2, Pp 615-630 (2008) |
op_relation |
http://www.biogeosciences.net/5/615/2008/bg-5-615-2008.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/d9c2bd25c18b4c0997e533e9ff7c007c |
_version_ |
1766127426591522816 |