A modeling assessment of the interplay between aeolian iron fluxes and iron-binding ligands in controlling carbon dioxide fluctuations during Antarctic warm events
We add a prognostic biogeochemical model to the Bern3D ocean circulation model to test the impact of increased aeolian iron fluxes in various regions of the ocean on long time scales. Atmospheric CO2 is most sensitive when modern dust flux is increased 100-fold in the Southern Ocean for 1000 years,...
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American Geophysical Union
2008
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ftdatacite:10.48350/37315 2023-05-15T13:44:13+02:00 A modeling assessment of the interplay between aeolian iron fluxes and iron-binding ligands in controlling carbon dioxide fluctuations during Antarctic warm events Parekh, Payal Joos, Fortunat Müller, Simon A. 2008 https://dx.doi.org/10.48350/37315 https://boris.unibe.ch/37315/ unknown American Geophysical Union https://dx.doi.org/10.1029/2007PA001531 open access publisher holds copyright http://purl.org/coar/access_right/c_abf2 530 Physics journal article article-journal Text ScholarlyArticle 2008 ftdatacite https://doi.org/10.48350/37315 https://doi.org/10.1029/2007PA001531 2022-02-08T16:39:48Z We add a prognostic biogeochemical model to the Bern3D ocean circulation model to test the impact of increased aeolian iron fluxes in various regions of the ocean on long time scales. Atmospheric CO2 is most sensitive when modern dust flux is increased 100-fold in the Southern Ocean for 1000 years, resulting in a reduction of 10 ppmv. Seeding the Indian Ocean and South Pacific results in increased export production and CO2 drawdown in the Southern Ocean due to interbasinal transport of iron. The non-sea-salt calcium record from Dome C, Antarctica, is used to scale aeolian iron deposition in the Southern Ocean in transient simulations over four Antarctic warm events of the last glacial period. Our results suggest changes in dust flux to the Southern Ocean played a limited role in modulating CO2 variations. The impact of iron fluxes on CO2 is dependent on parameter values chosen for the iron-binding ligand. Text Antarc* Antarctic Antarctica Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Southern Ocean Pacific Indian |
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530 Physics |
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530 Physics Parekh, Payal Joos, Fortunat Müller, Simon A. A modeling assessment of the interplay between aeolian iron fluxes and iron-binding ligands in controlling carbon dioxide fluctuations during Antarctic warm events |
topic_facet |
530 Physics |
description |
We add a prognostic biogeochemical model to the Bern3D ocean circulation model to test the impact of increased aeolian iron fluxes in various regions of the ocean on long time scales. Atmospheric CO2 is most sensitive when modern dust flux is increased 100-fold in the Southern Ocean for 1000 years, resulting in a reduction of 10 ppmv. Seeding the Indian Ocean and South Pacific results in increased export production and CO2 drawdown in the Southern Ocean due to interbasinal transport of iron. The non-sea-salt calcium record from Dome C, Antarctica, is used to scale aeolian iron deposition in the Southern Ocean in transient simulations over four Antarctic warm events of the last glacial period. Our results suggest changes in dust flux to the Southern Ocean played a limited role in modulating CO2 variations. The impact of iron fluxes on CO2 is dependent on parameter values chosen for the iron-binding ligand. |
format |
Text |
author |
Parekh, Payal Joos, Fortunat Müller, Simon A. |
author_facet |
Parekh, Payal Joos, Fortunat Müller, Simon A. |
author_sort |
Parekh, Payal |
title |
A modeling assessment of the interplay between aeolian iron fluxes and iron-binding ligands in controlling carbon dioxide fluctuations during Antarctic warm events |
title_short |
A modeling assessment of the interplay between aeolian iron fluxes and iron-binding ligands in controlling carbon dioxide fluctuations during Antarctic warm events |
title_full |
A modeling assessment of the interplay between aeolian iron fluxes and iron-binding ligands in controlling carbon dioxide fluctuations during Antarctic warm events |
title_fullStr |
A modeling assessment of the interplay between aeolian iron fluxes and iron-binding ligands in controlling carbon dioxide fluctuations during Antarctic warm events |
title_full_unstemmed |
A modeling assessment of the interplay between aeolian iron fluxes and iron-binding ligands in controlling carbon dioxide fluctuations during Antarctic warm events |
title_sort |
modeling assessment of the interplay between aeolian iron fluxes and iron-binding ligands in controlling carbon dioxide fluctuations during antarctic warm events |
publisher |
American Geophysical Union |
publishDate |
2008 |
url |
https://dx.doi.org/10.48350/37315 https://boris.unibe.ch/37315/ |
geographic |
Antarctic Southern Ocean Pacific Indian |
geographic_facet |
Antarctic Southern Ocean Pacific Indian |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_relation |
https://dx.doi.org/10.1029/2007PA001531 |
op_rights |
open access publisher holds copyright http://purl.org/coar/access_right/c_abf2 |
op_doi |
https://doi.org/10.48350/37315 https://doi.org/10.1029/2007PA001531 |
_version_ |
1766198919090405376 |