Iron fertilization of the Austral Ocean—The Hamburg Model Assessment
We have investigated the effect of an enhanced biological productivity, caused by an artificial iron fertilization, in the southern ocean with a three-dimensional carbon cycle model, which is based on an ocean circulation obtained by an ocean general circulation model. The increase of the biological...
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ftpubman:oai:pure.mpg.de:item_2573901 2023-08-20T04:05:22+02:00 Iron fertilization of the Austral Ocean—The Hamburg Model Assessment Kurz, K. Maier-Reimer, E. 1993 application/pdf http://hdl.handle.net/21.11116/0000-0001-2281-6 http://hdl.handle.net/21.11116/0000-0001-2283-4 http://hdl.handle.net/21.11116/0000-0001-2284-3 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1029/92GB02910 http://hdl.handle.net/21.11116/0000-0001-2281-6 http://hdl.handle.net/21.11116/0000-0001-2283-4 http://hdl.handle.net/21.11116/0000-0001-2284-3 info:eu-repo/semantics/openAccess Global Biogeochemical Cycles Report / Max-Planck-Institut für Meteorologie info:eu-repo/semantics/article 1993 ftpubman https://doi.org/10.1029/92GB02910 2023-08-01T21:17:42Z We have investigated the effect of an enhanced biological productivity, caused by an artificial iron fertilization, in the southern ocean with a three-dimensional carbon cycle model, which is based on an ocean circulation obtained by an ocean general circulation model. The increase of the biological production did not result in a substantial increase Of CO2 uptake by the ocean, as it has been proposed by Martin et al. (1990). We have found that - assuming that the basic structure of the particulate downward flux does not change when higher production occurs - the ocean circulation provides a higher return flux of remineralized products that compensates two thirds of the effect of the higher export production on the atmospheric pCO2. This finding is only slightly modified when assuming a much deeper penetration of particle flux due to the fertilization. Owing to the nonlinearity of the buffer factor the absolute value of CO2 reduction in the atmosphere is higher at high levels Of pCO2. In view of the logarithmic dependency of the radiative forcing on CO2, the fertilization is more efficient at low CO2 levels. With our carbon cycle model we have, in essence, confirmed earlier three-dimensional model studies with a simplified geochemical cycling of the Princeton group (Sarmiento and Orr, 1991). Article in Journal/Newspaper Austral Ocean Southern Ocean Max Planck Society: MPG.PuRe Austral Austral Ocean ENVELOPE(90.000,90.000,-60.000,-60.000) Sarmiento ENVELOPE(-68.000,-68.000,-72.000,-72.000) Southern Ocean Global Biogeochemical Cycles 7 1 229 244 |
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Open Polar |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
We have investigated the effect of an enhanced biological productivity, caused by an artificial iron fertilization, in the southern ocean with a three-dimensional carbon cycle model, which is based on an ocean circulation obtained by an ocean general circulation model. The increase of the biological production did not result in a substantial increase Of CO2 uptake by the ocean, as it has been proposed by Martin et al. (1990). We have found that - assuming that the basic structure of the particulate downward flux does not change when higher production occurs - the ocean circulation provides a higher return flux of remineralized products that compensates two thirds of the effect of the higher export production on the atmospheric pCO2. This finding is only slightly modified when assuming a much deeper penetration of particle flux due to the fertilization. Owing to the nonlinearity of the buffer factor the absolute value of CO2 reduction in the atmosphere is higher at high levels Of pCO2. In view of the logarithmic dependency of the radiative forcing on CO2, the fertilization is more efficient at low CO2 levels. With our carbon cycle model we have, in essence, confirmed earlier three-dimensional model studies with a simplified geochemical cycling of the Princeton group (Sarmiento and Orr, 1991). |
format |
Article in Journal/Newspaper |
author |
Kurz, K. Maier-Reimer, E. |
spellingShingle |
Kurz, K. Maier-Reimer, E. Iron fertilization of the Austral Ocean—The Hamburg Model Assessment |
author_facet |
Kurz, K. Maier-Reimer, E. |
author_sort |
Kurz, K. |
title |
Iron fertilization of the Austral Ocean—The Hamburg Model Assessment |
title_short |
Iron fertilization of the Austral Ocean—The Hamburg Model Assessment |
title_full |
Iron fertilization of the Austral Ocean—The Hamburg Model Assessment |
title_fullStr |
Iron fertilization of the Austral Ocean—The Hamburg Model Assessment |
title_full_unstemmed |
Iron fertilization of the Austral Ocean—The Hamburg Model Assessment |
title_sort |
iron fertilization of the austral ocean—the hamburg model assessment |
publishDate |
1993 |
url |
http://hdl.handle.net/21.11116/0000-0001-2281-6 http://hdl.handle.net/21.11116/0000-0001-2283-4 http://hdl.handle.net/21.11116/0000-0001-2284-3 |
long_lat |
ENVELOPE(90.000,90.000,-60.000,-60.000) ENVELOPE(-68.000,-68.000,-72.000,-72.000) |
geographic |
Austral Austral Ocean Sarmiento Southern Ocean |
geographic_facet |
Austral Austral Ocean Sarmiento Southern Ocean |
genre |
Austral Ocean Southern Ocean |
genre_facet |
Austral Ocean Southern Ocean |
op_source |
Global Biogeochemical Cycles Report / Max-Planck-Institut für Meteorologie |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/92GB02910 http://hdl.handle.net/21.11116/0000-0001-2281-6 http://hdl.handle.net/21.11116/0000-0001-2283-4 http://hdl.handle.net/21.11116/0000-0001-2284-3 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/92GB02910 |
container_title |
Global Biogeochemical Cycles |
container_volume |
7 |
container_issue |
1 |
container_start_page |
229 |
op_container_end_page |
244 |
_version_ |
1774715876301340672 |