Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity
The atmospheric deposition of both macronutrients and micronutrients plays an important role in driving primary productivity, particularly in the low-latitude ocean. We report aerosol major ion measurements for five ship-based sampling campaigns in the western Pacific from similar to 25 degrees N to...
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ftoceanrep:oai:oceanrep.geomar.de:25662 2023-05-15T17:35:18+02:00 Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity Martino, M. Hamilton, D. Baker, A. R. Jickells, T. D. Bromley, T. Nojiri, Y. Quack, Birgit Boyd, P. W. 2014-07 text https://oceanrep.geomar.de/id/eprint/25662/ https://oceanrep.geomar.de/id/eprint/25662/1/Martino%20et.al.pdf https://doi.org/10.1002/2013GB004794 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/25662/1/Martino%20et.al.pdf Martino, M., Hamilton, D., Baker, A. R., Jickells, T. D., Bromley, T., Nojiri, Y., Quack, B. and Boyd, P. W. (2014) Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity. Open Access Global Biogeochemical Cycles, 28 (7). pp. 712-728. DOI 10.1002/2013GB004794 <https://doi.org/10.1002/2013GB004794>. doi:10.1002/2013GB004794 info:eu-repo/semantics/openAccess Article PeerReviewed 2014 ftoceanrep https://doi.org/10.1002/2013GB004794 2023-04-07T15:14:27Z The atmospheric deposition of both macronutrients and micronutrients plays an important role in driving primary productivity, particularly in the low-latitude ocean. We report aerosol major ion measurements for five ship-based sampling campaigns in the western Pacific from similar to 25 degrees N to 20 degrees S and compare the results with those from Atlantic meridional transects (similar to 50 degrees N to 50 degrees S) with aerosols collected and analyzed in the same laboratory, allowing full incomparability. We discuss sources of the main nutrient species (nitrogen (N), phosphorus (P), and iron (Fe)) in the aerosols and their stoichiometry. Striking north-south gradients are evident over both basins with the Northern Hemisphere more impacted by terrestrial dust sources and anthropogenic emissions and the North Atlantic apparently more impacted than the North Pacific. We estimate the atmospheric supply rates of these nutrients and the potential impact of the atmospheric deposition on the tropical western Pacific. Our results suggest that the atmospheric deposition is P deficient relative to the needs of the resident phytoplankton. These findings suggest that atmospheric supply of N, Fe, and P increases primary productivity utilizing some of the residual excess phosphorus (P*) in the surface waters to compensate for aerosol P deficiency. Regional primary productivity is further enhanced via the stimulation of nitrogen fixation fuelled by the residual atmospheric iron and P*. Our stoichiometric calculations reveal that a P* of 0.1 mu mol L-1 can offset the P deficiency in atmospheric supply for many months. This study suggests that atmospheric deposition may sustain similar to 10% of primary production in both the western tropical Pacific. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Pacific Global Biogeochemical Cycles 28 7 712 728 |
institution |
Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The atmospheric deposition of both macronutrients and micronutrients plays an important role in driving primary productivity, particularly in the low-latitude ocean. We report aerosol major ion measurements for five ship-based sampling campaigns in the western Pacific from similar to 25 degrees N to 20 degrees S and compare the results with those from Atlantic meridional transects (similar to 50 degrees N to 50 degrees S) with aerosols collected and analyzed in the same laboratory, allowing full incomparability. We discuss sources of the main nutrient species (nitrogen (N), phosphorus (P), and iron (Fe)) in the aerosols and their stoichiometry. Striking north-south gradients are evident over both basins with the Northern Hemisphere more impacted by terrestrial dust sources and anthropogenic emissions and the North Atlantic apparently more impacted than the North Pacific. We estimate the atmospheric supply rates of these nutrients and the potential impact of the atmospheric deposition on the tropical western Pacific. Our results suggest that the atmospheric deposition is P deficient relative to the needs of the resident phytoplankton. These findings suggest that atmospheric supply of N, Fe, and P increases primary productivity utilizing some of the residual excess phosphorus (P*) in the surface waters to compensate for aerosol P deficiency. Regional primary productivity is further enhanced via the stimulation of nitrogen fixation fuelled by the residual atmospheric iron and P*. Our stoichiometric calculations reveal that a P* of 0.1 mu mol L-1 can offset the P deficiency in atmospheric supply for many months. This study suggests that atmospheric deposition may sustain similar to 10% of primary production in both the western tropical Pacific. |
format |
Article in Journal/Newspaper |
author |
Martino, M. Hamilton, D. Baker, A. R. Jickells, T. D. Bromley, T. Nojiri, Y. Quack, Birgit Boyd, P. W. |
spellingShingle |
Martino, M. Hamilton, D. Baker, A. R. Jickells, T. D. Bromley, T. Nojiri, Y. Quack, Birgit Boyd, P. W. Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity |
author_facet |
Martino, M. Hamilton, D. Baker, A. R. Jickells, T. D. Bromley, T. Nojiri, Y. Quack, Birgit Boyd, P. W. |
author_sort |
Martino, M. |
title |
Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity |
title_short |
Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity |
title_full |
Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity |
title_fullStr |
Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity |
title_full_unstemmed |
Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity |
title_sort |
western pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity |
publisher |
AGU (American Geophysical Union) |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/25662/ https://oceanrep.geomar.de/id/eprint/25662/1/Martino%20et.al.pdf https://doi.org/10.1002/2013GB004794 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/25662/1/Martino%20et.al.pdf Martino, M., Hamilton, D., Baker, A. R., Jickells, T. D., Bromley, T., Nojiri, Y., Quack, B. and Boyd, P. W. (2014) Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity. Open Access Global Biogeochemical Cycles, 28 (7). pp. 712-728. DOI 10.1002/2013GB004794 <https://doi.org/10.1002/2013GB004794>. doi:10.1002/2013GB004794 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2013GB004794 |
container_title |
Global Biogeochemical Cycles |
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28 |
container_issue |
7 |
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728 |
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