Atmospheric P deposition to the subtropical North Atlantic: sources, properties, and relationship to N deposition
Biogeochemical studies show that the surface waters of the subtropical North Atlantic are highly phosphorus (P) stressed. Human activity may exacerbate phosphorus stress by enhancing atmospheric nitrogen (N) deposition and raising N/P ratios in deposition. However, the magnitude of this effect is un...
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ftoceanrep:oai:oceanrep.geomar.de:20736 2023-05-15T17:28:24+02:00 Atmospheric P deposition to the subtropical North Atlantic: sources, properties, and relationship to N deposition Zamora, Lauren Prospero, J. M. Hansell, D. A. Trapp, J. M. 2013 text https://oceanrep.geomar.de/id/eprint/20736/ https://oceanrep.geomar.de/id/eprint/20736/1/Zamora_etal_2013_JGR.pdf https://doi.org/10.1002/jgrd.50187 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/20736/1/Zamora_etal_2013_JGR.pdf Zamora, L., Prospero, J. M., Hansell, D. A. and Trapp, J. M. (2013) Atmospheric P deposition to the subtropical North Atlantic: sources, properties, and relationship to N deposition. Open Access Journal of Geophysical Research: Atmospheres, 118 . pp. 1-17. DOI 10.1002/jgrd.50187 <https://doi.org/10.1002/jgrd.50187>. doi:10.1002/jgrd.50187 info:eu-repo/semantics/openAccess Article PeerReviewed 2013 ftoceanrep https://doi.org/10.1002/jgrd.50187 2023-04-07T15:08:20Z Biogeochemical studies show that the surface waters of the subtropical North Atlantic are highly phosphorus (P) stressed. Human activity may exacerbate phosphorus stress by enhancing atmospheric nitrogen (N) deposition and raising N/P ratios in deposition. However, the magnitude of this effect is unclear, in part, because atmospherically deposited phosphorus sources are not well known, particularly the contribution from organic phosphorus. Here we report measurements of phosphorus in aerosols and wet deposition at Miami and Barbados. African dust is the major aerosol P source at both Miami and Barbados, containing ~880 ppm total phosphorus and ~70 ppm soluble reactive phosphorus (SRP). Organic compounds contribute, on average, 28%–44% of soluble phosphorus in precipitation. Because of dust transport seasonality, phosphorus inputs to the North Atlantic are expected to be highly variable with 2–10 times more P deposition during summer than winter. Pollution is also an important contributor to total and soluble phosphorus in Miami aerosols and deposition. Estimated SRP deposition in Barbados and Miami is 0.21 and 0.13 µmol m−2 d−1 phosphorus, respectively. Inorganic nitrogen in excess of Redfield ratio expectations in deposition was very different between the sites, totaling 21–30 and 127–132 µmol m−2 d−1 nitrogen in Barbados and Miami, respectively; the high deposition rates at Miami are linked to pollutants. Including soluble organic nitrogen and phosphorus halved the estimates of excess nitrogen in Barbados wet deposition. Thus, the organic phosphorus fraction is important in the assessment of the magnitude of biogeochemical change of the North Atlantic caused by atmospheric deposition. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Journal of Geophysical Research: Atmospheres 118 3 1546 1562 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Biogeochemical studies show that the surface waters of the subtropical North Atlantic are highly phosphorus (P) stressed. Human activity may exacerbate phosphorus stress by enhancing atmospheric nitrogen (N) deposition and raising N/P ratios in deposition. However, the magnitude of this effect is unclear, in part, because atmospherically deposited phosphorus sources are not well known, particularly the contribution from organic phosphorus. Here we report measurements of phosphorus in aerosols and wet deposition at Miami and Barbados. African dust is the major aerosol P source at both Miami and Barbados, containing ~880 ppm total phosphorus and ~70 ppm soluble reactive phosphorus (SRP). Organic compounds contribute, on average, 28%–44% of soluble phosphorus in precipitation. Because of dust transport seasonality, phosphorus inputs to the North Atlantic are expected to be highly variable with 2–10 times more P deposition during summer than winter. Pollution is also an important contributor to total and soluble phosphorus in Miami aerosols and deposition. Estimated SRP deposition in Barbados and Miami is 0.21 and 0.13 µmol m−2 d−1 phosphorus, respectively. Inorganic nitrogen in excess of Redfield ratio expectations in deposition was very different between the sites, totaling 21–30 and 127–132 µmol m−2 d−1 nitrogen in Barbados and Miami, respectively; the high deposition rates at Miami are linked to pollutants. Including soluble organic nitrogen and phosphorus halved the estimates of excess nitrogen in Barbados wet deposition. Thus, the organic phosphorus fraction is important in the assessment of the magnitude of biogeochemical change of the North Atlantic caused by atmospheric deposition. |
format |
Article in Journal/Newspaper |
author |
Zamora, Lauren Prospero, J. M. Hansell, D. A. Trapp, J. M. |
spellingShingle |
Zamora, Lauren Prospero, J. M. Hansell, D. A. Trapp, J. M. Atmospheric P deposition to the subtropical North Atlantic: sources, properties, and relationship to N deposition |
author_facet |
Zamora, Lauren Prospero, J. M. Hansell, D. A. Trapp, J. M. |
author_sort |
Zamora, Lauren |
title |
Atmospheric P deposition to the subtropical North Atlantic: sources, properties, and relationship to N deposition |
title_short |
Atmospheric P deposition to the subtropical North Atlantic: sources, properties, and relationship to N deposition |
title_full |
Atmospheric P deposition to the subtropical North Atlantic: sources, properties, and relationship to N deposition |
title_fullStr |
Atmospheric P deposition to the subtropical North Atlantic: sources, properties, and relationship to N deposition |
title_full_unstemmed |
Atmospheric P deposition to the subtropical North Atlantic: sources, properties, and relationship to N deposition |
title_sort |
atmospheric p deposition to the subtropical north atlantic: sources, properties, and relationship to n deposition |
publisher |
AGU (American Geophysical Union) |
publishDate |
2013 |
url |
https://oceanrep.geomar.de/id/eprint/20736/ https://oceanrep.geomar.de/id/eprint/20736/1/Zamora_etal_2013_JGR.pdf https://doi.org/10.1002/jgrd.50187 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/20736/1/Zamora_etal_2013_JGR.pdf Zamora, L., Prospero, J. M., Hansell, D. A. and Trapp, J. M. (2013) Atmospheric P deposition to the subtropical North Atlantic: sources, properties, and relationship to N deposition. Open Access Journal of Geophysical Research: Atmospheres, 118 . pp. 1-17. DOI 10.1002/jgrd.50187 <https://doi.org/10.1002/jgrd.50187>. doi:10.1002/jgrd.50187 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/jgrd.50187 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
118 |
container_issue |
3 |
container_start_page |
1546 |
op_container_end_page |
1562 |
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1766121050874052608 |