Trends in the solubility of iron, aluminium, manganese and phosphorus in aerosol collected over the Atlantic Ocean
The solubility of iron, aluminium, manganese and phosphorus has been determined in aerosol samples collected between 49°N and 52°S during three cruises conducted in the Atlantic Ocean as part of the European Union funded IRONAGES programme. Solubilities (defined at pH 4.7) determined for Fe and Al i...
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Language: | English |
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2016
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Online Access: | https://doi.org/10.1016/j.marchem.2005.06.004 https://ora.ox.ac.uk/objects/uuid:6aa13ee3-a126-4155-9aba-eccd26ffe7af |
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ftuloxford:oai:ora.ox.ac.uk:uuid:6aa13ee3-a126-4155-9aba-eccd26ffe7af 2023-05-15T18:25:42+02:00 Trends in the solubility of iron, aluminium, manganese and phosphorus in aerosol collected over the Atlantic Ocean Baker, A Jickells, T Witt, M Linge, K 2016-07-28 https://doi.org/10.1016/j.marchem.2005.06.004 https://ora.ox.ac.uk/objects/uuid:6aa13ee3-a126-4155-9aba-eccd26ffe7af eng eng doi:10.1016/j.marchem.2005.06.004 https://ora.ox.ac.uk/objects/uuid:6aa13ee3-a126-4155-9aba-eccd26ffe7af https://doi.org/10.1016/j.marchem.2005.06.004 info:eu-repo/semantics/embargoedAccess Journal article 2016 ftuloxford https://doi.org/10.1016/j.marchem.2005.06.004 2022-06-28T20:14:37Z The solubility of iron, aluminium, manganese and phosphorus has been determined in aerosol samples collected between 49°N and 52°S during three cruises conducted in the Atlantic Ocean as part of the European Union funded IRONAGES programme. Solubilities (defined at pH 4.7) determined for Fe and Al in samples of Saharan dust were significantly lower (medians 1.7% and 3.0%, respectively) than the solubilities of these metals in aerosols from other source regions (whole dataset medians 5.2% and 9.0%, respectively). Mn solubility also varied with aerosol source, but the median solubility of Mn in Saharan dust was very similar to the median for the dataset as a whole (55% and 56%, respectively). The observed solubility of aerosol P was ∼ 32%, with P solubility in Saharan aerosol perhaps as low as 10%. Laboratory studies have indicated that aerosol Fe solubility is enhanced by acid processing. No relationship could be found between Fe solubility and the concentrations of acid species (non-seasalt SO42-, NO3-) nor the net acidity of the aerosol, so we are unable to confirm that this process is significant in the atmosphere. In terms of the supply of soluble Fe to oceanic ecosystems on a global scale, the observed higher solubility for Fe in non-Saharan aerosols is probably not significant because the Sahara is easily the dominant source of Fe to the Atlantic. On a smaller scale however, higher solubility for aerosol Fe may alter our understanding of Fe cycling in regions such as the remote Southern Ocean. © 2005 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Southern Ocean ORA - Oxford University Research Archive Southern Ocean Marine Chemistry 98 1 43 58 |
institution |
Open Polar |
collection |
ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
English |
description |
The solubility of iron, aluminium, manganese and phosphorus has been determined in aerosol samples collected between 49°N and 52°S during three cruises conducted in the Atlantic Ocean as part of the European Union funded IRONAGES programme. Solubilities (defined at pH 4.7) determined for Fe and Al in samples of Saharan dust were significantly lower (medians 1.7% and 3.0%, respectively) than the solubilities of these metals in aerosols from other source regions (whole dataset medians 5.2% and 9.0%, respectively). Mn solubility also varied with aerosol source, but the median solubility of Mn in Saharan dust was very similar to the median for the dataset as a whole (55% and 56%, respectively). The observed solubility of aerosol P was ∼ 32%, with P solubility in Saharan aerosol perhaps as low as 10%. Laboratory studies have indicated that aerosol Fe solubility is enhanced by acid processing. No relationship could be found between Fe solubility and the concentrations of acid species (non-seasalt SO42-, NO3-) nor the net acidity of the aerosol, so we are unable to confirm that this process is significant in the atmosphere. In terms of the supply of soluble Fe to oceanic ecosystems on a global scale, the observed higher solubility for Fe in non-Saharan aerosols is probably not significant because the Sahara is easily the dominant source of Fe to the Atlantic. On a smaller scale however, higher solubility for aerosol Fe may alter our understanding of Fe cycling in regions such as the remote Southern Ocean. © 2005 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Baker, A Jickells, T Witt, M Linge, K |
spellingShingle |
Baker, A Jickells, T Witt, M Linge, K Trends in the solubility of iron, aluminium, manganese and phosphorus in aerosol collected over the Atlantic Ocean |
author_facet |
Baker, A Jickells, T Witt, M Linge, K |
author_sort |
Baker, A |
title |
Trends in the solubility of iron, aluminium, manganese and phosphorus in aerosol collected over the Atlantic Ocean |
title_short |
Trends in the solubility of iron, aluminium, manganese and phosphorus in aerosol collected over the Atlantic Ocean |
title_full |
Trends in the solubility of iron, aluminium, manganese and phosphorus in aerosol collected over the Atlantic Ocean |
title_fullStr |
Trends in the solubility of iron, aluminium, manganese and phosphorus in aerosol collected over the Atlantic Ocean |
title_full_unstemmed |
Trends in the solubility of iron, aluminium, manganese and phosphorus in aerosol collected over the Atlantic Ocean |
title_sort |
trends in the solubility of iron, aluminium, manganese and phosphorus in aerosol collected over the atlantic ocean |
publishDate |
2016 |
url |
https://doi.org/10.1016/j.marchem.2005.06.004 https://ora.ox.ac.uk/objects/uuid:6aa13ee3-a126-4155-9aba-eccd26ffe7af |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
doi:10.1016/j.marchem.2005.06.004 https://ora.ox.ac.uk/objects/uuid:6aa13ee3-a126-4155-9aba-eccd26ffe7af https://doi.org/10.1016/j.marchem.2005.06.004 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1016/j.marchem.2005.06.004 |
container_title |
Marine Chemistry |
container_volume |
98 |
container_issue |
1 |
container_start_page |
43 |
op_container_end_page |
58 |
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1766207311070625792 |