Impacts of atmospheric nutrient inputs on marine biogeochemistry
The primary nutrients that limit marine phytoplankton growth rates include nitrogen (N), phosphorus (P), iron (Fe), and silicon (Si). Atmospheric transport and deposition provides a source for each of these nutrients to the oceans. We utilize an ocean biogeochemical model to examine the relative imp...
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ftcdlib:qt4ww0512f 2023-05-15T17:34:46+02:00 Impacts of atmospheric nutrient inputs on marine biogeochemistry Krishnamurthy, Aparna Moore, J. Keith Mahowald, Natalie Luo, Chao Zender, Charles S 2010-02-06 application/pdf http://www.escholarship.org/uc/item/4ww0512f english eng eScholarship, University of California qt4ww0512f http://www.escholarship.org/uc/item/4ww0512f Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Krishnamurthy, Aparna; Moore, J. Keith; Mahowald, Natalie; Luo, Chao; & Zender, Charles S. (2010). Impacts of atmospheric nutrient inputs on marine biogeochemistry. Journal of Geophysical Research, 115(G1). doi:10.1029/2009JG001115. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/4ww0512f Physical Sciences and Mathematics north-atlantic ocean global nitrogen-cycle supply-and-demand world ocean organic nitrogen dust deposition chemical-composition particulate matter phosphorus cycle dissolved iron article 2010 ftcdlib https://doi.org/10.1029/2009JG001115 2016-04-02T18:48:27Z The primary nutrients that limit marine phytoplankton growth rates include nitrogen (N), phosphorus (P), iron (Fe), and silicon (Si). Atmospheric transport and deposition provides a source for each of these nutrients to the oceans. We utilize an ocean biogeochemical model to examine the relative importance of these atmospheric inputs for ocean biogeochemistry and export production. In the current era, simulations with the biogeochemical elemental cycling ocean model suggest that globally, atmospheric Fe inputs could support roughly 50% of the Fe exported from the euphotic zone by sinking organic and inorganic particles. Variations in atmospheric iron inputs strongly impact spatial patterns of phytoplankton growth limitation and the areal extent of the high-nutrient, low-chlorophyll regions. Atmospheric inputs of N, Si, and P have smaller impacts, potentially accounting for 5.1%, 0.21%, and 0.12% of the biogenic export of these elements from the euphotic zone, respectively. Soluble Fe input from the atmosphere is sufficient to support most of the export production in many ocean regions, whether we use a spatially variable aerosol Fe solubility, or a globally constant 2% solubility. Regionally atmospheric N inputs can have significant impacts on marine biogeochemistry, potentially supporting >25% of the export production, an impact that is increasing due to human activities. Atmospheric Si and P inputs have only minimal impacts on marine ecosystem productivity and biogeochemistry, as these inputs are typically quite small relative to the flux of these nutrients from below the euphotic zone. Article in Journal/Newspaper North Atlantic University of California: eScholarship Journal of Geophysical Research 115 G1 |
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Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
topic |
Physical Sciences and Mathematics north-atlantic ocean global nitrogen-cycle supply-and-demand world ocean organic nitrogen dust deposition chemical-composition particulate matter phosphorus cycle dissolved iron |
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Physical Sciences and Mathematics north-atlantic ocean global nitrogen-cycle supply-and-demand world ocean organic nitrogen dust deposition chemical-composition particulate matter phosphorus cycle dissolved iron Krishnamurthy, Aparna Moore, J. Keith Mahowald, Natalie Luo, Chao Zender, Charles S Impacts of atmospheric nutrient inputs on marine biogeochemistry |
topic_facet |
Physical Sciences and Mathematics north-atlantic ocean global nitrogen-cycle supply-and-demand world ocean organic nitrogen dust deposition chemical-composition particulate matter phosphorus cycle dissolved iron |
description |
The primary nutrients that limit marine phytoplankton growth rates include nitrogen (N), phosphorus (P), iron (Fe), and silicon (Si). Atmospheric transport and deposition provides a source for each of these nutrients to the oceans. We utilize an ocean biogeochemical model to examine the relative importance of these atmospheric inputs for ocean biogeochemistry and export production. In the current era, simulations with the biogeochemical elemental cycling ocean model suggest that globally, atmospheric Fe inputs could support roughly 50% of the Fe exported from the euphotic zone by sinking organic and inorganic particles. Variations in atmospheric iron inputs strongly impact spatial patterns of phytoplankton growth limitation and the areal extent of the high-nutrient, low-chlorophyll regions. Atmospheric inputs of N, Si, and P have smaller impacts, potentially accounting for 5.1%, 0.21%, and 0.12% of the biogenic export of these elements from the euphotic zone, respectively. Soluble Fe input from the atmosphere is sufficient to support most of the export production in many ocean regions, whether we use a spatially variable aerosol Fe solubility, or a globally constant 2% solubility. Regionally atmospheric N inputs can have significant impacts on marine biogeochemistry, potentially supporting >25% of the export production, an impact that is increasing due to human activities. Atmospheric Si and P inputs have only minimal impacts on marine ecosystem productivity and biogeochemistry, as these inputs are typically quite small relative to the flux of these nutrients from below the euphotic zone. |
format |
Article in Journal/Newspaper |
author |
Krishnamurthy, Aparna Moore, J. Keith Mahowald, Natalie Luo, Chao Zender, Charles S |
author_facet |
Krishnamurthy, Aparna Moore, J. Keith Mahowald, Natalie Luo, Chao Zender, Charles S |
author_sort |
Krishnamurthy, Aparna |
title |
Impacts of atmospheric nutrient inputs on marine biogeochemistry |
title_short |
Impacts of atmospheric nutrient inputs on marine biogeochemistry |
title_full |
Impacts of atmospheric nutrient inputs on marine biogeochemistry |
title_fullStr |
Impacts of atmospheric nutrient inputs on marine biogeochemistry |
title_full_unstemmed |
Impacts of atmospheric nutrient inputs on marine biogeochemistry |
title_sort |
impacts of atmospheric nutrient inputs on marine biogeochemistry |
publisher |
eScholarship, University of California |
publishDate |
2010 |
url |
http://www.escholarship.org/uc/item/4ww0512f |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Krishnamurthy, Aparna; Moore, J. Keith; Mahowald, Natalie; Luo, Chao; & Zender, Charles S. (2010). Impacts of atmospheric nutrient inputs on marine biogeochemistry. Journal of Geophysical Research, 115(G1). doi:10.1029/2009JG001115. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/4ww0512f |
op_relation |
qt4ww0512f http://www.escholarship.org/uc/item/4ww0512f |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2009JG001115 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
G1 |
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1766133688465096704 |