Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean
Dissolved iron (dFe) distributions, atmospheric and vertical subduction fluxes of dFe were determined in the upper water column for two meridional transects of the Atlantic Ocean. The data demonstrate the disparity between the iron biogeochemistry of the North and South Atlantic Ocean and show well...
Published in: | Global Biogeochemical Cycles |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:43747 2023-06-06T11:57:18+02:00 Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean Ussher, Simon J. Achterberg, Eric P. Powell, Claire Baker, Alex R. Jickells, Tim D. Torres, Ricardo Worsfold, Paul J. 2013-12 application/pdf https://ueaeprints.uea.ac.uk/id/eprint/43747/ https://ueaeprints.uea.ac.uk/id/eprint/43747/1/Ussher_etal_2013_GlobalBiogeochemicalCycles.pdf https://doi.org/10.1002/gbc.20056 en eng https://ueaeprints.uea.ac.uk/id/eprint/43747/1/Ussher_etal_2013_GlobalBiogeochemicalCycles.pdf Ussher, Simon J., Achterberg, Eric P., Powell, Claire, Baker, Alex R., Jickells, Tim D., Torres, Ricardo and Worsfold, Paul J. (2013) Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean. Global Biogeochemical Cycles, 27 (4). pp. 1096-1107. ISSN 0886-6236 doi:10.1002/gbc.20056 Article PeerReviewed 2013 ftuniveastangl https://doi.org/10.1002/gbc.20056 2023-04-13T22:31:45Z Dissolved iron (dFe) distributions, atmospheric and vertical subduction fluxes of dFe were determined in the upper water column for two meridional transects of the Atlantic Ocean. The data demonstrate the disparity between the iron biogeochemistry of the North and South Atlantic Ocean and show well defined gradients of size fractionated iron species in surface waters between geographic provinces. The highest dFe and lowest mixed layer residence times (0.4-2.7 y) were found in the northern tropical and subtropical regions. In contrast, the South Atlantic Gyre had lower dFe concentrations (<0.4 nM) and much longer residence times (> 5 y), presumably due to lower atmospheric inputs and more efficient biological recycling of iron in this region. Vertical input fluxes of dFe to surface waters ranged from 20 - 170?nmol?m-2 d-1 in the North Atlantic and tropical provinces, whereas average fluxes of 6 - 13?nmol?m-2 d-1 were estimated for the South Atlantic. Our estimates showed that the variable dFe distribution over the surface Atlantic (<0.1 – 2.0 nM) predominantly reflected atmospheric Fe deposition fluxes (>50% of total vertical Fe flux to surface waters) rather than upwelling or vertical mixing. This demonstrates the strength of the connection between land-derived atmospheric Fe fluxes and the biological cycling of carbon and nitrogen in the Atlantic Ocean. Article in Journal/Newspaper North Atlantic South Atlantic Ocean University of East Anglia: UEA Digital Repository Global Biogeochemical Cycles 27 4 1096 1107 |
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Open Polar |
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University of East Anglia: UEA Digital Repository |
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ftuniveastangl |
language |
English |
description |
Dissolved iron (dFe) distributions, atmospheric and vertical subduction fluxes of dFe were determined in the upper water column for two meridional transects of the Atlantic Ocean. The data demonstrate the disparity between the iron biogeochemistry of the North and South Atlantic Ocean and show well defined gradients of size fractionated iron species in surface waters between geographic provinces. The highest dFe and lowest mixed layer residence times (0.4-2.7 y) were found in the northern tropical and subtropical regions. In contrast, the South Atlantic Gyre had lower dFe concentrations (<0.4 nM) and much longer residence times (> 5 y), presumably due to lower atmospheric inputs and more efficient biological recycling of iron in this region. Vertical input fluxes of dFe to surface waters ranged from 20 - 170?nmol?m-2 d-1 in the North Atlantic and tropical provinces, whereas average fluxes of 6 - 13?nmol?m-2 d-1 were estimated for the South Atlantic. Our estimates showed that the variable dFe distribution over the surface Atlantic (<0.1 – 2.0 nM) predominantly reflected atmospheric Fe deposition fluxes (>50% of total vertical Fe flux to surface waters) rather than upwelling or vertical mixing. This demonstrates the strength of the connection between land-derived atmospheric Fe fluxes and the biological cycling of carbon and nitrogen in the Atlantic Ocean. |
format |
Article in Journal/Newspaper |
author |
Ussher, Simon J. Achterberg, Eric P. Powell, Claire Baker, Alex R. Jickells, Tim D. Torres, Ricardo Worsfold, Paul J. |
spellingShingle |
Ussher, Simon J. Achterberg, Eric P. Powell, Claire Baker, Alex R. Jickells, Tim D. Torres, Ricardo Worsfold, Paul J. Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean |
author_facet |
Ussher, Simon J. Achterberg, Eric P. Powell, Claire Baker, Alex R. Jickells, Tim D. Torres, Ricardo Worsfold, Paul J. |
author_sort |
Ussher, Simon J. |
title |
Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean |
title_short |
Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean |
title_full |
Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean |
title_fullStr |
Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean |
title_full_unstemmed |
Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean |
title_sort |
impact of atmospheric deposition on the contrasting iron biogeochemistry of the north and south atlantic ocean |
publishDate |
2013 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/43747/ https://ueaeprints.uea.ac.uk/id/eprint/43747/1/Ussher_etal_2013_GlobalBiogeochemicalCycles.pdf https://doi.org/10.1002/gbc.20056 |
genre |
North Atlantic South Atlantic Ocean |
genre_facet |
North Atlantic South Atlantic Ocean |
op_relation |
https://ueaeprints.uea.ac.uk/id/eprint/43747/1/Ussher_etal_2013_GlobalBiogeochemicalCycles.pdf Ussher, Simon J., Achterberg, Eric P., Powell, Claire, Baker, Alex R., Jickells, Tim D., Torres, Ricardo and Worsfold, Paul J. (2013) Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean. Global Biogeochemical Cycles, 27 (4). pp. 1096-1107. ISSN 0886-6236 doi:10.1002/gbc.20056 |
op_doi |
https://doi.org/10.1002/gbc.20056 |
container_title |
Global Biogeochemical Cycles |
container_volume |
27 |
container_issue |
4 |
container_start_page |
1096 |
op_container_end_page |
1107 |
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1767965393401413632 |