Changes in iron speciation following a Saharan dust event in the tropical North Atlantic Ocean
Concentrations of dissolved iron (DFe) and Fe-binding ligands were determined in the tropical Northeast Atlantic Ocean (12–30°N, 21–29°W) as part of the UK-SOLAS (Surface Ocean Lower Atmosphere Study) cruise Poseidon 332 (P332) in January–February 2006. The surface water DFe concentrations varied be...
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ftnerc:oai:nora.nerc.ac.uk:521924 2023-05-15T17:35:15+02:00 Changes in iron speciation following a Saharan dust event in the tropical North Atlantic Ocean Rijkenberg, Micha J.A. Powell, Claire F. Dall'Osto, Manuel Nielsdottir, Maria C. Patey, Matthew D. Hill, Polly G. Baker, Alex R. Jickells, Tim D. Harrison, Roy M. Achterberg, Eric P. 2008 http://nora.nerc.ac.uk/id/eprint/521924/ https://doi.org/10.1016/j.marchem.2008.02.006 unknown Rijkenberg, Micha J.A.; Powell, Claire F.; Dall'Osto, Manuel; Nielsdottir, Maria C.; Patey, Matthew D. orcid:0000-0001-8677-2818 Hill, Polly G.; Baker, Alex R.; Jickells, Tim D.; Harrison, Roy M.; Achterberg, Eric P. 2008 Changes in iron speciation following a Saharan dust event in the tropical North Atlantic Ocean. Marine Chemistry, 110 (1-2). 56-67. https://doi.org/10.1016/j.marchem.2008.02.006 <https://doi.org/10.1016/j.marchem.2008.02.006> Publication - Article PeerReviewed 2008 ftnerc https://doi.org/10.1016/j.marchem.2008.02.006 2023-02-04T19:47:35Z Concentrations of dissolved iron (DFe) and Fe-binding ligands were determined in the tropical Northeast Atlantic Ocean (12–30°N, 21–29°W) as part of the UK-SOLAS (Surface Ocean Lower Atmosphere Study) cruise Poseidon 332 (P332) in January–February 2006. The surface water DFe concentrations varied between 0.1 and 0.4 nM with an average of 0.22 ± 0.05 nM (n = 159). The surface water concentrations of total Fe-binding ligands varied between 0.82 and 1.46 nM with an average of 1.11 ± 0.14 nM (n = 33). The concentration of uncomplexed Fe-binding ligands varied between 0.64 and 1.35 nM with an average of 0.90 ± 0.14 nM (n = 33). Thus, on average 81% of the total Fe-binding ligand concentration was uncomplexed. The average logarithmic conditional stability constant of the pool of Fe-binding ligands was 22.85 ± 0.38 with respect to Fe3+ (n = 33). A transect (12°N, 26°W to 16°N, 25.3°W) was sailed during a small Saharan dust event and repeated a week later. Following the dust event, the concentration of DFe increased from 0.20 ± 0.026 nM (n = 125) to 0.25 ± 0.028 (n = 17) and the concentration of free Fe-binding ligands decreased from 1.15 ± 0.15 (n = 4) to 0.89 ± 0.10 (n = 4) nM. Furthermore, the logarithmic stability constants of the Fe-binding ligands south of the Cape Verde islands were distinctively lower than north of the islands. The absence of a change in the logarithmic stability constant after the dust event south of the Cape Verde islands suggests that there was no significant atmospheric input of new Fe-binding ligands during this dust event. Article in Journal/Newspaper North Atlantic Northeast Atlantic Natural Environment Research Council: NERC Open Research Archive Marine Chemistry 110 1-2 56 67 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
Concentrations of dissolved iron (DFe) and Fe-binding ligands were determined in the tropical Northeast Atlantic Ocean (12–30°N, 21–29°W) as part of the UK-SOLAS (Surface Ocean Lower Atmosphere Study) cruise Poseidon 332 (P332) in January–February 2006. The surface water DFe concentrations varied between 0.1 and 0.4 nM with an average of 0.22 ± 0.05 nM (n = 159). The surface water concentrations of total Fe-binding ligands varied between 0.82 and 1.46 nM with an average of 1.11 ± 0.14 nM (n = 33). The concentration of uncomplexed Fe-binding ligands varied between 0.64 and 1.35 nM with an average of 0.90 ± 0.14 nM (n = 33). Thus, on average 81% of the total Fe-binding ligand concentration was uncomplexed. The average logarithmic conditional stability constant of the pool of Fe-binding ligands was 22.85 ± 0.38 with respect to Fe3+ (n = 33). A transect (12°N, 26°W to 16°N, 25.3°W) was sailed during a small Saharan dust event and repeated a week later. Following the dust event, the concentration of DFe increased from 0.20 ± 0.026 nM (n = 125) to 0.25 ± 0.028 (n = 17) and the concentration of free Fe-binding ligands decreased from 1.15 ± 0.15 (n = 4) to 0.89 ± 0.10 (n = 4) nM. Furthermore, the logarithmic stability constants of the Fe-binding ligands south of the Cape Verde islands were distinctively lower than north of the islands. The absence of a change in the logarithmic stability constant after the dust event south of the Cape Verde islands suggests that there was no significant atmospheric input of new Fe-binding ligands during this dust event. |
format |
Article in Journal/Newspaper |
author |
Rijkenberg, Micha J.A. Powell, Claire F. Dall'Osto, Manuel Nielsdottir, Maria C. Patey, Matthew D. Hill, Polly G. Baker, Alex R. Jickells, Tim D. Harrison, Roy M. Achterberg, Eric P. |
spellingShingle |
Rijkenberg, Micha J.A. Powell, Claire F. Dall'Osto, Manuel Nielsdottir, Maria C. Patey, Matthew D. Hill, Polly G. Baker, Alex R. Jickells, Tim D. Harrison, Roy M. Achterberg, Eric P. Changes in iron speciation following a Saharan dust event in the tropical North Atlantic Ocean |
author_facet |
Rijkenberg, Micha J.A. Powell, Claire F. Dall'Osto, Manuel Nielsdottir, Maria C. Patey, Matthew D. Hill, Polly G. Baker, Alex R. Jickells, Tim D. Harrison, Roy M. Achterberg, Eric P. |
author_sort |
Rijkenberg, Micha J.A. |
title |
Changes in iron speciation following a Saharan dust event in the tropical North Atlantic Ocean |
title_short |
Changes in iron speciation following a Saharan dust event in the tropical North Atlantic Ocean |
title_full |
Changes in iron speciation following a Saharan dust event in the tropical North Atlantic Ocean |
title_fullStr |
Changes in iron speciation following a Saharan dust event in the tropical North Atlantic Ocean |
title_full_unstemmed |
Changes in iron speciation following a Saharan dust event in the tropical North Atlantic Ocean |
title_sort |
changes in iron speciation following a saharan dust event in the tropical north atlantic ocean |
publishDate |
2008 |
url |
http://nora.nerc.ac.uk/id/eprint/521924/ https://doi.org/10.1016/j.marchem.2008.02.006 |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_relation |
Rijkenberg, Micha J.A.; Powell, Claire F.; Dall'Osto, Manuel; Nielsdottir, Maria C.; Patey, Matthew D. orcid:0000-0001-8677-2818 Hill, Polly G.; Baker, Alex R.; Jickells, Tim D.; Harrison, Roy M.; Achterberg, Eric P. 2008 Changes in iron speciation following a Saharan dust event in the tropical North Atlantic Ocean. Marine Chemistry, 110 (1-2). 56-67. https://doi.org/10.1016/j.marchem.2008.02.006 <https://doi.org/10.1016/j.marchem.2008.02.006> |
op_doi |
https://doi.org/10.1016/j.marchem.2008.02.006 |
container_title |
Marine Chemistry |
container_volume |
110 |
container_issue |
1-2 |
container_start_page |
56 |
op_container_end_page |
67 |
_version_ |
1766134345599287296 |