Particulate phases are key in controlling dissolved iron concentrations in the (sub)tropical North Atlantic
The supply and bioavailability of iron (Fe) controls primary productivity and N2 fixation in large parts of the global ocean. An important, yet poorly quantified, source to the ocean is particulate Fe (pFe). Here we present the first combined dataset of particulate, labile-particulate (L-pFe), and d...
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ftleedsuniv:oai:eprints.whiterose.ac.uk:127894 2023-05-15T17:29:30+02:00 Particulate phases are key in controlling dissolved iron concentrations in the (sub)tropical North Atlantic Milne, Angela Schlosser, Christian Wake, Bronwyn D. Achterberg, Eric P. Chance, Rosie Baker, Alex R. Forryan, Alex Lohan, Maeve C. 2017-03-16 text https://eprints.whiterose.ac.uk/127894/ https://eprints.whiterose.ac.uk/127894/1/Milne_et_al_2017_Geophysical_Research_Letters.pdf https://doi.org/10.1002/2016GL072314 en eng https://eprints.whiterose.ac.uk/127894/1/Milne_et_al_2017_Geophysical_Research_Letters.pdf Milne, Angela, Schlosser, Christian, Wake, Bronwyn D. et al. (5 more authors) (2017) Particulate phases are key in controlling dissolved iron concentrations in the (sub)tropical North Atlantic. Geophysical Research Letters. pp. 2377-2387. ISSN 0094-8276 Article PeerReviewed 2017 ftleedsuniv https://doi.org/10.1002/2016GL072314 2023-01-30T22:04:10Z The supply and bioavailability of iron (Fe) controls primary productivity and N2 fixation in large parts of the global ocean. An important, yet poorly quantified, source to the ocean is particulate Fe (pFe). Here we present the first combined dataset of particulate, labile-particulate (L-pFe), and dissolved Fe (dFe) from the (sub)tropical North Atlantic. We show a strong relationship between L-pFe and dFe, indicating a dynamic equilibrium between these two phases whereby particles “buffer” dFe and maintain the elevated concentrations observed. Moreover, L-pFe can increase the overall “available” (L-pFe + dFe) Fe pool by up to 55%. The lateral shelf flux of this available Fe was similar in magnitude to observed soluble aerosol-Fe deposition, a comparison that has not been previously considered. These findings demonstrate that L-pFe is integral to Fe cycling and hence plays a role in regulating carbon cycling, warranting its inclusion in Fe budgets and biogeochemical models. Article in Journal/Newspaper North Atlantic White Rose Research Online (Universities of Leeds, Sheffield & York) Geophysical Research Letters 44 5 2377 2387 |
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White Rose Research Online (Universities of Leeds, Sheffield & York) |
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English |
description |
The supply and bioavailability of iron (Fe) controls primary productivity and N2 fixation in large parts of the global ocean. An important, yet poorly quantified, source to the ocean is particulate Fe (pFe). Here we present the first combined dataset of particulate, labile-particulate (L-pFe), and dissolved Fe (dFe) from the (sub)tropical North Atlantic. We show a strong relationship between L-pFe and dFe, indicating a dynamic equilibrium between these two phases whereby particles “buffer” dFe and maintain the elevated concentrations observed. Moreover, L-pFe can increase the overall “available” (L-pFe + dFe) Fe pool by up to 55%. The lateral shelf flux of this available Fe was similar in magnitude to observed soluble aerosol-Fe deposition, a comparison that has not been previously considered. These findings demonstrate that L-pFe is integral to Fe cycling and hence plays a role in regulating carbon cycling, warranting its inclusion in Fe budgets and biogeochemical models. |
format |
Article in Journal/Newspaper |
author |
Milne, Angela Schlosser, Christian Wake, Bronwyn D. Achterberg, Eric P. Chance, Rosie Baker, Alex R. Forryan, Alex Lohan, Maeve C. |
spellingShingle |
Milne, Angela Schlosser, Christian Wake, Bronwyn D. Achterberg, Eric P. Chance, Rosie Baker, Alex R. Forryan, Alex Lohan, Maeve C. Particulate phases are key in controlling dissolved iron concentrations in the (sub)tropical North Atlantic |
author_facet |
Milne, Angela Schlosser, Christian Wake, Bronwyn D. Achterberg, Eric P. Chance, Rosie Baker, Alex R. Forryan, Alex Lohan, Maeve C. |
author_sort |
Milne, Angela |
title |
Particulate phases are key in controlling dissolved iron concentrations in the (sub)tropical North Atlantic |
title_short |
Particulate phases are key in controlling dissolved iron concentrations in the (sub)tropical North Atlantic |
title_full |
Particulate phases are key in controlling dissolved iron concentrations in the (sub)tropical North Atlantic |
title_fullStr |
Particulate phases are key in controlling dissolved iron concentrations in the (sub)tropical North Atlantic |
title_full_unstemmed |
Particulate phases are key in controlling dissolved iron concentrations in the (sub)tropical North Atlantic |
title_sort |
particulate phases are key in controlling dissolved iron concentrations in the (sub)tropical north atlantic |
publishDate |
2017 |
url |
https://eprints.whiterose.ac.uk/127894/ https://eprints.whiterose.ac.uk/127894/1/Milne_et_al_2017_Geophysical_Research_Letters.pdf https://doi.org/10.1002/2016GL072314 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://eprints.whiterose.ac.uk/127894/1/Milne_et_al_2017_Geophysical_Research_Letters.pdf Milne, Angela, Schlosser, Christian, Wake, Bronwyn D. et al. (5 more authors) (2017) Particulate phases are key in controlling dissolved iron concentrations in the (sub)tropical North Atlantic. Geophysical Research Letters. pp. 2377-2387. ISSN 0094-8276 |
op_doi |
https://doi.org/10.1002/2016GL072314 |
container_title |
Geophysical Research Letters |
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44 |
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5 |
container_start_page |
2377 |
op_container_end_page |
2387 |
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1766123637776056320 |