The effect of atmospheric acid processing on the global deposition of bioavailable phosphorus from dust
The role of dust as a source of bioavailable phosphorus (Bio-P) is quantified using a new parameterization for apatite dissolution in combination with global soil data maps and a global aerosol transport model. Mineral dust provides 31.2 Gg-P yr-1 of Bio-P to the oceans, with 14.3 Gg-P yr-1 from lab...
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ftnottinghtrentu:oai:irep.ntu.ac.uk:34322 2023-05-15T17:35:14+02:00 The effect of atmospheric acid processing on the global deposition of bioavailable phosphorus from dust Herbert, RJ Krom, M Carslaw, KS Stockdale, A Mortimer, RJG Benning, L Pringle, JK Browse, J 2018-09 text http://irep.ntu.ac.uk/id/eprint/34322/ http://irep.ntu.ac.uk/id/eprint/34322/1/11739_Mortimer.pdf https://doi.org/10.1029/2018GB005880 en eng Wiley-Blackwell http://irep.ntu.ac.uk/id/eprint/34322/1/11739_Mortimer.pdf HERBERT, R.J., KROM, M., CARSLAW, K.S., STOCKDALE, A., MORTIMER, R.J.G., BENNING, L., PRINGLE, J.K. and BROWSE, J., 2018. The effect of atmospheric acid processing on the global deposition of bioavailable phosphorus from dust. Global Biogeochemical Cycles, 32 (9), pp. 1367-1385. ISSN 0886-6236 doi:10.1029/2018GB005880 Article PeerReviewed 2018 ftnottinghtrentu https://doi.org/10.1029/2018GB005880 2022-01-09T07:11:14Z The role of dust as a source of bioavailable phosphorus (Bio-P) is quantified using a new parameterization for apatite dissolution in combination with global soil data maps and a global aerosol transport model. Mineral dust provides 31.2 Gg-P yr-1 of Bio-P to the oceans, with 14.3 Gg-P yr-1 from labile P present in the dust, and an aditional 16.9 Gg-P yr from acid dissolution of apatite in the atmosphere, representing an increase of 120%. The North Atlantic, north west Pacific, and Mediterranean Sea are identified as important sites of Bio-P deposition from mineral dust. The acid dissolution process increases the fraction of total-P that is bioavailable from ~10% globally from the labile pool to 23% in the Atlantic Ocean, 45% in the Pacific Ocean, and 21% in the Indian Ocean, with an ocean global mean value of 22%. Strong seasonal variations, especially in the North Pacific, northwest Atlantic, and Indian Ocean, are driven by large-scale meteorology and pollution sources from industrial and biomass-burning regions. Globally constant values of total-P content and bioavailable fraction used previously do not capture the simulated variability. We find particular sensitivity to the representation of particle-to-particle variability of apatite, which supplies Bio-P through acid-dissolution, and calcium carbonate, which helps to buffer the dissolution process. A modest 10% external mixing results in an increase of Bio-P deposition by 18%. The total Bio-P calculated here (31.2 Gg-P yr-1) represents a minimum compared to previous estimates due to the relatively low total-P in the global soil map used. Article in Journal/Newspaper North Atlantic Northwest Atlantic Nottingham Trent University's Institutional Repository (IRep) Indian Pacific Global Biogeochemical Cycles 32 9 1367 1385 |
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Open Polar |
collection |
Nottingham Trent University's Institutional Repository (IRep) |
op_collection_id |
ftnottinghtrentu |
language |
English |
description |
The role of dust as a source of bioavailable phosphorus (Bio-P) is quantified using a new parameterization for apatite dissolution in combination with global soil data maps and a global aerosol transport model. Mineral dust provides 31.2 Gg-P yr-1 of Bio-P to the oceans, with 14.3 Gg-P yr-1 from labile P present in the dust, and an aditional 16.9 Gg-P yr from acid dissolution of apatite in the atmosphere, representing an increase of 120%. The North Atlantic, north west Pacific, and Mediterranean Sea are identified as important sites of Bio-P deposition from mineral dust. The acid dissolution process increases the fraction of total-P that is bioavailable from ~10% globally from the labile pool to 23% in the Atlantic Ocean, 45% in the Pacific Ocean, and 21% in the Indian Ocean, with an ocean global mean value of 22%. Strong seasonal variations, especially in the North Pacific, northwest Atlantic, and Indian Ocean, are driven by large-scale meteorology and pollution sources from industrial and biomass-burning regions. Globally constant values of total-P content and bioavailable fraction used previously do not capture the simulated variability. We find particular sensitivity to the representation of particle-to-particle variability of apatite, which supplies Bio-P through acid-dissolution, and calcium carbonate, which helps to buffer the dissolution process. A modest 10% external mixing results in an increase of Bio-P deposition by 18%. The total Bio-P calculated here (31.2 Gg-P yr-1) represents a minimum compared to previous estimates due to the relatively low total-P in the global soil map used. |
format |
Article in Journal/Newspaper |
author |
Herbert, RJ Krom, M Carslaw, KS Stockdale, A Mortimer, RJG Benning, L Pringle, JK Browse, J |
spellingShingle |
Herbert, RJ Krom, M Carslaw, KS Stockdale, A Mortimer, RJG Benning, L Pringle, JK Browse, J The effect of atmospheric acid processing on the global deposition of bioavailable phosphorus from dust |
author_facet |
Herbert, RJ Krom, M Carslaw, KS Stockdale, A Mortimer, RJG Benning, L Pringle, JK Browse, J |
author_sort |
Herbert, RJ |
title |
The effect of atmospheric acid processing on the global deposition of bioavailable phosphorus from dust |
title_short |
The effect of atmospheric acid processing on the global deposition of bioavailable phosphorus from dust |
title_full |
The effect of atmospheric acid processing on the global deposition of bioavailable phosphorus from dust |
title_fullStr |
The effect of atmospheric acid processing on the global deposition of bioavailable phosphorus from dust |
title_full_unstemmed |
The effect of atmospheric acid processing on the global deposition of bioavailable phosphorus from dust |
title_sort |
effect of atmospheric acid processing on the global deposition of bioavailable phosphorus from dust |
publisher |
Wiley-Blackwell |
publishDate |
2018 |
url |
http://irep.ntu.ac.uk/id/eprint/34322/ http://irep.ntu.ac.uk/id/eprint/34322/1/11739_Mortimer.pdf https://doi.org/10.1029/2018GB005880 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic Northwest Atlantic |
genre_facet |
North Atlantic Northwest Atlantic |
op_relation |
http://irep.ntu.ac.uk/id/eprint/34322/1/11739_Mortimer.pdf HERBERT, R.J., KROM, M., CARSLAW, K.S., STOCKDALE, A., MORTIMER, R.J.G., BENNING, L., PRINGLE, J.K. and BROWSE, J., 2018. The effect of atmospheric acid processing on the global deposition of bioavailable phosphorus from dust. Global Biogeochemical Cycles, 32 (9), pp. 1367-1385. ISSN 0886-6236 doi:10.1029/2018GB005880 |
op_doi |
https://doi.org/10.1029/2018GB005880 |
container_title |
Global Biogeochemical Cycles |
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32 |
container_issue |
9 |
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1367 |
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1385 |
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1766134321096163328 |