POSSIBLE EFFECTS OF IRON FERTILIZATION IN THE SOUTHERN OCEAN ON ATMOSPHERIC CO 2 CONCENTRATION
Abstract. Recently, it was proposed (Baum, 1990 and Martin et al., 1990a, 1990b) that the southern ocean should be fertilized with iron to stimulate biological productivity, thus enhancing the flux of organi carbon from surface to depth, thereby lowering the concentration of inorgani carbon in surfa...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.358.1013 2023-05-15T18:24:48+02:00 POSSIBLE EFFECTS OF IRON FERTILIZATION IN THE SOUTHERN OCEAN ON ATMOSPHERIC CO 2 CONCENTRATION Fortunat Joos Ulrich Siegenthaler Jorge L. Sarmiento The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.358.1013 http://www.gfdl.noaa.gov/bibliography/related_files/fj9101.pdf?PHPSESSID=5b5ea82aa75249a7b4a1fb04ce2c4fe4 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.358.1013 http://www.gfdl.noaa.gov/bibliography/related_files/fj9101.pdf?PHPSESSID=5b5ea82aa75249a7b4a1fb04ce2c4fe4 Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.gfdl.noaa.gov/bibliography/related_files/fj9101.pdf?PHPSESSID=5b5ea82aa75249a7b4a1fb04ce2c4fe4 text ftciteseerx 2016-01-08T00:39:47Z Abstract. Recently, it was proposed (Baum, 1990 and Martin et al., 1990a, 1990b) that the southern ocean should be fertilized with iron to stimulate biological productivity, thus enhancing the flux of organi carbon from surface to depth, thereby lowering the concentration of inorgani carbon in surface water and in turn the atmospheric CO2 concentration. We explore the possible impact of a hypothetical iron fertilization on atmospheric CO2 levels during the next century using a high-latitude exchange/interior diffusion advection model. Assuming as an upper-limit scenario that it is possible to stimulate the uptake of the abundant nutrients in the southern ocean, the maximum atmospheric CO2 depletion is 58 ppm after 50 years and 107 ppm after 100 years. This scenario requires completely effective Fe fertilization to be carded out over 16 % of the world ocean area. Sensitivity stud/es and comparison with other models suggest that the errors in these limits due to uncertainties in the transport parameters, which are determined by calibrating the model with radiocarbon and validated with CFC-11 measurements, range from-29 % to +17%. If ironstimulated biological productivity is halted during the six winter months, the additional oceanic CO2 uptake is reduced by 18%. Possible changes in surface water alkalinity alter the result of iron fertilization by less than +9 % to-28%. Burial of the iron-induced particle flux as opposed to remineralization in the deep ocean Text Southern Ocean Unknown Southern Ocean |
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English |
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Abstract. Recently, it was proposed (Baum, 1990 and Martin et al., 1990a, 1990b) that the southern ocean should be fertilized with iron to stimulate biological productivity, thus enhancing the flux of organi carbon from surface to depth, thereby lowering the concentration of inorgani carbon in surface water and in turn the atmospheric CO2 concentration. We explore the possible impact of a hypothetical iron fertilization on atmospheric CO2 levels during the next century using a high-latitude exchange/interior diffusion advection model. Assuming as an upper-limit scenario that it is possible to stimulate the uptake of the abundant nutrients in the southern ocean, the maximum atmospheric CO2 depletion is 58 ppm after 50 years and 107 ppm after 100 years. This scenario requires completely effective Fe fertilization to be carded out over 16 % of the world ocean area. Sensitivity stud/es and comparison with other models suggest that the errors in these limits due to uncertainties in the transport parameters, which are determined by calibrating the model with radiocarbon and validated with CFC-11 measurements, range from-29 % to +17%. If ironstimulated biological productivity is halted during the six winter months, the additional oceanic CO2 uptake is reduced by 18%. Possible changes in surface water alkalinity alter the result of iron fertilization by less than +9 % to-28%. Burial of the iron-induced particle flux as opposed to remineralization in the deep ocean |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Fortunat Joos Ulrich Siegenthaler Jorge L. Sarmiento |
spellingShingle |
Fortunat Joos Ulrich Siegenthaler Jorge L. Sarmiento POSSIBLE EFFECTS OF IRON FERTILIZATION IN THE SOUTHERN OCEAN ON ATMOSPHERIC CO 2 CONCENTRATION |
author_facet |
Fortunat Joos Ulrich Siegenthaler Jorge L. Sarmiento |
author_sort |
Fortunat Joos |
title |
POSSIBLE EFFECTS OF IRON FERTILIZATION IN THE SOUTHERN OCEAN ON ATMOSPHERIC CO 2 CONCENTRATION |
title_short |
POSSIBLE EFFECTS OF IRON FERTILIZATION IN THE SOUTHERN OCEAN ON ATMOSPHERIC CO 2 CONCENTRATION |
title_full |
POSSIBLE EFFECTS OF IRON FERTILIZATION IN THE SOUTHERN OCEAN ON ATMOSPHERIC CO 2 CONCENTRATION |
title_fullStr |
POSSIBLE EFFECTS OF IRON FERTILIZATION IN THE SOUTHERN OCEAN ON ATMOSPHERIC CO 2 CONCENTRATION |
title_full_unstemmed |
POSSIBLE EFFECTS OF IRON FERTILIZATION IN THE SOUTHERN OCEAN ON ATMOSPHERIC CO 2 CONCENTRATION |
title_sort |
possible effects of iron fertilization in the southern ocean on atmospheric co 2 concentration |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.358.1013 http://www.gfdl.noaa.gov/bibliography/related_files/fj9101.pdf?PHPSESSID=5b5ea82aa75249a7b4a1fb04ce2c4fe4 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
http://www.gfdl.noaa.gov/bibliography/related_files/fj9101.pdf?PHPSESSID=5b5ea82aa75249a7b4a1fb04ce2c4fe4 |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.358.1013 http://www.gfdl.noaa.gov/bibliography/related_files/fj9101.pdf?PHPSESSID=5b5ea82aa75249a7b4a1fb04ce2c4fe4 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766205723755151360 |