Dissolved iron in the tropical and subtropical Atlantic Ocean
[1] Detailed depth profiles and surface transects of dissolved iron (DFe defined by 0.4-mm filtration) were investigated on three cruises in the subtropical and tropical Atlantic Ocean where dust deposition varied by 3 orders of magnitude. Surface DFe and dissolved Mn concentrations reflected dust d...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.528.7175 2023-05-15T13:34:48+02:00 Dissolved iron in the tropical and subtropical Atlantic Ocean B. A. Bergquist E. A. Boyle The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.528.7175 http://boyle.mit.edu/~ed/PDFs/Bergquist(2006)GBC.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.528.7175 http://boyle.mit.edu/~ed/PDFs/Bergquist(2006)GBC.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://boyle.mit.edu/~ed/PDFs/Bergquist(2006)GBC.pdf text ftciteseerx 2016-01-08T10:28:25Z [1] Detailed depth profiles and surface transects of dissolved iron (DFe defined by 0.4-mm filtration) were investigated on three cruises in the subtropical and tropical Atlantic Ocean where dust deposition varied by 3 orders of magnitude. Surface DFe and dissolved Mn concentrations reflected dust deposition trends, but are not proportional to the estimated inputs. Using estimates of the atmospheric flux of DFe, surface DFe residence times were calculated to be on the order of 1 to 5 months. Deepwater DFe concentrations varied with water masses depending on their source, age, and transit pathways. At a site located on the edge of the equatorial system (10N, 45W), high DFe (>1 nmol/kg) was associated with an oxygen minimum zone at depths of 130 to 1100 m. DFe concentrations in North Atlantic Deep Water (NADW) decreased by 30 % from sites in the North Atlantic to a site in the South Atlantic (24.5S, 37W), and DFe was lower in the Antarctic derived water masses (0.4 nmol/kg) than in NADW at the South Atlantic site. An estimate of deepwater scavenging residence time for DFe was 270 ± 140 years based on decreasing DFe along the NADW flow path. Text Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic Unknown Antarctic The Antarctic |
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ftciteseerx |
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English |
description |
[1] Detailed depth profiles and surface transects of dissolved iron (DFe defined by 0.4-mm filtration) were investigated on three cruises in the subtropical and tropical Atlantic Ocean where dust deposition varied by 3 orders of magnitude. Surface DFe and dissolved Mn concentrations reflected dust deposition trends, but are not proportional to the estimated inputs. Using estimates of the atmospheric flux of DFe, surface DFe residence times were calculated to be on the order of 1 to 5 months. Deepwater DFe concentrations varied with water masses depending on their source, age, and transit pathways. At a site located on the edge of the equatorial system (10N, 45W), high DFe (>1 nmol/kg) was associated with an oxygen minimum zone at depths of 130 to 1100 m. DFe concentrations in North Atlantic Deep Water (NADW) decreased by 30 % from sites in the North Atlantic to a site in the South Atlantic (24.5S, 37W), and DFe was lower in the Antarctic derived water masses (0.4 nmol/kg) than in NADW at the South Atlantic site. An estimate of deepwater scavenging residence time for DFe was 270 ± 140 years based on decreasing DFe along the NADW flow path. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
B. A. Bergquist E. A. Boyle |
spellingShingle |
B. A. Bergquist E. A. Boyle Dissolved iron in the tropical and subtropical Atlantic Ocean |
author_facet |
B. A. Bergquist E. A. Boyle |
author_sort |
B. A. Bergquist |
title |
Dissolved iron in the tropical and subtropical Atlantic Ocean |
title_short |
Dissolved iron in the tropical and subtropical Atlantic Ocean |
title_full |
Dissolved iron in the tropical and subtropical Atlantic Ocean |
title_fullStr |
Dissolved iron in the tropical and subtropical Atlantic Ocean |
title_full_unstemmed |
Dissolved iron in the tropical and subtropical Atlantic Ocean |
title_sort |
dissolved iron in the tropical and subtropical atlantic ocean |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.528.7175 http://boyle.mit.edu/~ed/PDFs/Bergquist(2006)GBC.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic |
genre_facet |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic |
op_source |
http://boyle.mit.edu/~ed/PDFs/Bergquist(2006)GBC.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.528.7175 http://boyle.mit.edu/~ed/PDFs/Bergquist(2006)GBC.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766057671051444224 |