A circumpolar dust conveyor in the glacial Southern Ocean
Abstract The increased flux of soluble iron (Fe) to the Fe-deficient Southern Ocean by atmospheric dust is considered to have stimulated the net primary production and carbon export, thus promoting atmospheric CO 2 drawdown during glacial periods. Yet, little is known about the sources and transport...
Published in: | Nature Communications |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Science and Business Media LLC
2020
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1038/s41467-020-18858-y http://www.nature.com/articles/s41467-020-18858-y.pdf http://www.nature.com/articles/s41467-020-18858-y |
id |
crspringernat:10.1038/s41467-020-18858-y |
---|---|
record_format |
openpolar |
spelling |
crspringernat:10.1038/s41467-020-18858-y 2023-05-15T14:13:17+02:00 A circumpolar dust conveyor in the glacial Southern Ocean Struve, Torben Pahnke, Katharina Lamy, Frank Wengler, Marc Böning, Philipp Winckler, Gisela 2020 http://dx.doi.org/10.1038/s41467-020-18858-y http://www.nature.com/articles/s41467-020-18858-y.pdf http://www.nature.com/articles/s41467-020-18858-y en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Nature Communications volume 11, issue 1 ISSN 2041-1723 General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry journal-article 2020 crspringernat https://doi.org/10.1038/s41467-020-18858-y 2022-01-04T07:15:17Z Abstract The increased flux of soluble iron (Fe) to the Fe-deficient Southern Ocean by atmospheric dust is considered to have stimulated the net primary production and carbon export, thus promoting atmospheric CO 2 drawdown during glacial periods. Yet, little is known about the sources and transport pathways of Southern Hemisphere dust during the Last Glacial Maximum (LGM). Here we show that Central South America (~24‒32°S) contributed up to ~80% of the dust deposition in the South Pacific Subantarctic Zone via efficient circum-Antarctic dust transport during the LGM, whereas the Antarctic Zone was dominated by dust from Australia. This pattern is in contrast to the modern/Holocene pattern, when South Pacific dust fluxes are thought to be primarily supported by Australian sources. Our findings reveal that in the glacial Southern Ocean, Fe fertilization critically relies on the dynamic interaction of changes in dust-Fe sources in Central South America with the circumpolar westerly wind system. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Springer Nature (via Crossref) Antarctic Pacific Southern Ocean The Antarctic Nature Communications 11 1 |
institution |
Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
spellingShingle |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry Struve, Torben Pahnke, Katharina Lamy, Frank Wengler, Marc Böning, Philipp Winckler, Gisela A circumpolar dust conveyor in the glacial Southern Ocean |
topic_facet |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
description |
Abstract The increased flux of soluble iron (Fe) to the Fe-deficient Southern Ocean by atmospheric dust is considered to have stimulated the net primary production and carbon export, thus promoting atmospheric CO 2 drawdown during glacial periods. Yet, little is known about the sources and transport pathways of Southern Hemisphere dust during the Last Glacial Maximum (LGM). Here we show that Central South America (~24‒32°S) contributed up to ~80% of the dust deposition in the South Pacific Subantarctic Zone via efficient circum-Antarctic dust transport during the LGM, whereas the Antarctic Zone was dominated by dust from Australia. This pattern is in contrast to the modern/Holocene pattern, when South Pacific dust fluxes are thought to be primarily supported by Australian sources. Our findings reveal that in the glacial Southern Ocean, Fe fertilization critically relies on the dynamic interaction of changes in dust-Fe sources in Central South America with the circumpolar westerly wind system. |
format |
Article in Journal/Newspaper |
author |
Struve, Torben Pahnke, Katharina Lamy, Frank Wengler, Marc Böning, Philipp Winckler, Gisela |
author_facet |
Struve, Torben Pahnke, Katharina Lamy, Frank Wengler, Marc Böning, Philipp Winckler, Gisela |
author_sort |
Struve, Torben |
title |
A circumpolar dust conveyor in the glacial Southern Ocean |
title_short |
A circumpolar dust conveyor in the glacial Southern Ocean |
title_full |
A circumpolar dust conveyor in the glacial Southern Ocean |
title_fullStr |
A circumpolar dust conveyor in the glacial Southern Ocean |
title_full_unstemmed |
A circumpolar dust conveyor in the glacial Southern Ocean |
title_sort |
circumpolar dust conveyor in the glacial southern ocean |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1038/s41467-020-18858-y http://www.nature.com/articles/s41467-020-18858-y.pdf http://www.nature.com/articles/s41467-020-18858-y |
geographic |
Antarctic Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Nature Communications volume 11, issue 1 ISSN 2041-1723 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-020-18858-y |
container_title |
Nature Communications |
container_volume |
11 |
container_issue |
1 |
_version_ |
1766285719587782656 |