Tracing and constraining anthropogenic aerosol iron fluxes to the North Atlantic Ocean using iron isotopes
Atmospheric dust is an important source of the micronutrient Fe to the oceans. Although relatively insoluble mineral Fe is assumed to be the most important component of dust, a relatively small yet highly soluble anthropogenic component may also be significant. However, quantifying the importance of...
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ftissuelab:oai:harvest.issuelab.org:35681 2023-05-15T17:26:45+02:00 Tracing and constraining anthropogenic aerosol iron fluxes to the North Atlantic Ocean using iron isotopes Ana M. Aguilar-Islas Douglas S. Hamilton Natalie M. Mahowald Rachel U. Shelley Tim M. Conway William M. Landing North America / North Atlantic 2019-06-06 https://doi.org/10.1038/s41467-019-10457-w eng eng Nature Communications doi:10.1038/s41467-019-10457-w https://creativecommons.org/licenses/by/4.0 CC-BY Energy and Environment text 2019 ftissuelab https://doi.org/10.1038/s41467-019-10457-w 2022-01-09T08:54:49Z Atmospheric dust is an important source of the micronutrient Fe to the oceans. Although relatively insoluble mineral Fe is assumed to be the most important component of dust, a relatively small yet highly soluble anthropogenic component may also be significant. However, quantifying the importance of anthropogenic Fe to the global oceans requires a tracer which can be used to identify and constrain anthropogenic aerosols in situ. Here, we present Fe isotope (?56Fe) data from North Atlantic aerosol samples from the GEOTRACES GA03 section. While soluble aerosol samples collected near the Sahara have near-crustal ?56Fe, soluble aerosols from near North America and Europe instead have remarkably fractionated ?56Fe values (as light as ?1.6‰). Here, we use these observations to fingerprint anthropogenic combustion sources, and to refine aerosol deposition modeling. We show that soluble anthropogenic aerosol Fe flux to the global surface oceans is highly likely to be underestimated, even in the dusty North Atlantic. Text North Atlantic IssueLab (Nonprofit Research) Nature Communications 10 1 |
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ftissuelab |
language |
English |
topic |
Energy and Environment |
spellingShingle |
Energy and Environment Ana M. Aguilar-Islas Douglas S. Hamilton Natalie M. Mahowald Rachel U. Shelley Tim M. Conway William M. Landing Tracing and constraining anthropogenic aerosol iron fluxes to the North Atlantic Ocean using iron isotopes |
topic_facet |
Energy and Environment |
description |
Atmospheric dust is an important source of the micronutrient Fe to the oceans. Although relatively insoluble mineral Fe is assumed to be the most important component of dust, a relatively small yet highly soluble anthropogenic component may also be significant. However, quantifying the importance of anthropogenic Fe to the global oceans requires a tracer which can be used to identify and constrain anthropogenic aerosols in situ. Here, we present Fe isotope (?56Fe) data from North Atlantic aerosol samples from the GEOTRACES GA03 section. While soluble aerosol samples collected near the Sahara have near-crustal ?56Fe, soluble aerosols from near North America and Europe instead have remarkably fractionated ?56Fe values (as light as ?1.6‰). Here, we use these observations to fingerprint anthropogenic combustion sources, and to refine aerosol deposition modeling. We show that soluble anthropogenic aerosol Fe flux to the global surface oceans is highly likely to be underestimated, even in the dusty North Atlantic. |
format |
Text |
author |
Ana M. Aguilar-Islas Douglas S. Hamilton Natalie M. Mahowald Rachel U. Shelley Tim M. Conway William M. Landing |
author_facet |
Ana M. Aguilar-Islas Douglas S. Hamilton Natalie M. Mahowald Rachel U. Shelley Tim M. Conway William M. Landing |
author_sort |
Ana M. Aguilar-Islas |
title |
Tracing and constraining anthropogenic aerosol iron fluxes to the North Atlantic Ocean using iron isotopes |
title_short |
Tracing and constraining anthropogenic aerosol iron fluxes to the North Atlantic Ocean using iron isotopes |
title_full |
Tracing and constraining anthropogenic aerosol iron fluxes to the North Atlantic Ocean using iron isotopes |
title_fullStr |
Tracing and constraining anthropogenic aerosol iron fluxes to the North Atlantic Ocean using iron isotopes |
title_full_unstemmed |
Tracing and constraining anthropogenic aerosol iron fluxes to the North Atlantic Ocean using iron isotopes |
title_sort |
tracing and constraining anthropogenic aerosol iron fluxes to the north atlantic ocean using iron isotopes |
publisher |
Nature Communications |
publishDate |
2019 |
url |
https://doi.org/10.1038/s41467-019-10457-w |
op_coverage |
North America / North Atlantic |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
doi:10.1038/s41467-019-10457-w |
op_rights |
https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-019-10457-w |
container_title |
Nature Communications |
container_volume |
10 |
container_issue |
1 |
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1766118555740274688 |