The underappreciated role of anthropogenic sources in atmospheric soluble iron flux to the Southern Ocean
Abstract The atmospheric deposition of soluble (bioaccessible) iron enhances ocean primary productivity and subsequent atmospheric CO2 sequestration in iron-limited ocean basins, especially the Southern Ocean. While anthropogenic sources have been recently suggested to be important in some northern...
Published in: | npj Climate and Atmospheric Science |
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Online Access: | https://doi.org/10.1038/s41612-022-00250-w https://doaj.org/article/5d0c971f34f04c91a031c2138e7f9266 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:5d0c971f34f04c91a031c2138e7f9266 2023-05-15T18:23:38+02:00 The underappreciated role of anthropogenic sources in atmospheric soluble iron flux to the Southern Ocean Mingxu Liu Hitoshi Matsui Douglas S. Hamilton Kara D. Lamb Sagar D. Rathod Joshua P. Schwarz Natalie M. Mahowald 2022-04-01 https://doi.org/10.1038/s41612-022-00250-w https://doaj.org/article/5d0c971f34f04c91a031c2138e7f9266 en eng Nature Portfolio doi:10.1038/s41612-022-00250-w 2397-3722 https://doaj.org/article/5d0c971f34f04c91a031c2138e7f9266 undefined npj Climate and Atmospheric Science, Vol 5, Iss 1, Pp 1-9 (2022) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.1038/s41612-022-00250-w 2023-01-22T17:50:56Z Abstract The atmospheric deposition of soluble (bioaccessible) iron enhances ocean primary productivity and subsequent atmospheric CO2 sequestration in iron-limited ocean basins, especially the Southern Ocean. While anthropogenic sources have been recently suggested to be important in some northern hemisphere oceans, the role in the Southern Ocean remains ambiguous. By comparing multiple model simulations with the new aircraft observations for anthropogenic iron, we show that anthropogenic soluble iron deposition flux to the Southern Ocean could be underestimated by more than a factor of ten in previous modeling estimates. Our improved estimate for the anthropogenic iron budget enhances its contribution on the soluble iron deposition in the Southern Ocean from about 10% to 60%, implying a dominant role of anthropogenic sources. We predict that anthropogenic soluble iron deposition in the Southern Ocean is reduced substantially (30‒90%) by the year 2100, and plays a major role in the future evolution of atmospheric soluble iron inputs to the Southern Ocean. Article in Journal/Newspaper Southern Ocean Unknown Southern Ocean npj Climate and Atmospheric Science 5 1 |
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geo envir Mingxu Liu Hitoshi Matsui Douglas S. Hamilton Kara D. Lamb Sagar D. Rathod Joshua P. Schwarz Natalie M. Mahowald The underappreciated role of anthropogenic sources in atmospheric soluble iron flux to the Southern Ocean |
topic_facet |
geo envir |
description |
Abstract The atmospheric deposition of soluble (bioaccessible) iron enhances ocean primary productivity and subsequent atmospheric CO2 sequestration in iron-limited ocean basins, especially the Southern Ocean. While anthropogenic sources have been recently suggested to be important in some northern hemisphere oceans, the role in the Southern Ocean remains ambiguous. By comparing multiple model simulations with the new aircraft observations for anthropogenic iron, we show that anthropogenic soluble iron deposition flux to the Southern Ocean could be underestimated by more than a factor of ten in previous modeling estimates. Our improved estimate for the anthropogenic iron budget enhances its contribution on the soluble iron deposition in the Southern Ocean from about 10% to 60%, implying a dominant role of anthropogenic sources. We predict that anthropogenic soluble iron deposition in the Southern Ocean is reduced substantially (30‒90%) by the year 2100, and plays a major role in the future evolution of atmospheric soluble iron inputs to the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Mingxu Liu Hitoshi Matsui Douglas S. Hamilton Kara D. Lamb Sagar D. Rathod Joshua P. Schwarz Natalie M. Mahowald |
author_facet |
Mingxu Liu Hitoshi Matsui Douglas S. Hamilton Kara D. Lamb Sagar D. Rathod Joshua P. Schwarz Natalie M. Mahowald |
author_sort |
Mingxu Liu |
title |
The underappreciated role of anthropogenic sources in atmospheric soluble iron flux to the Southern Ocean |
title_short |
The underappreciated role of anthropogenic sources in atmospheric soluble iron flux to the Southern Ocean |
title_full |
The underappreciated role of anthropogenic sources in atmospheric soluble iron flux to the Southern Ocean |
title_fullStr |
The underappreciated role of anthropogenic sources in atmospheric soluble iron flux to the Southern Ocean |
title_full_unstemmed |
The underappreciated role of anthropogenic sources in atmospheric soluble iron flux to the Southern Ocean |
title_sort |
underappreciated role of anthropogenic sources in atmospheric soluble iron flux to the southern ocean |
publisher |
Nature Portfolio |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41612-022-00250-w https://doaj.org/article/5d0c971f34f04c91a031c2138e7f9266 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
npj Climate and Atmospheric Science, Vol 5, Iss 1, Pp 1-9 (2022) |
op_relation |
doi:10.1038/s41612-022-00250-w 2397-3722 https://doaj.org/article/5d0c971f34f04c91a031c2138e7f9266 |
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https://doi.org/10.1038/s41612-022-00250-w |
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npj Climate and Atmospheric Science |
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5 |
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1 |
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