Constraints on Soluble Aerosol Iron Flux to the Southern Ocean at the Last Glacial Maximum
Relief of iron (Fe) limitation in the Southern Ocean during ice ages, with potentially increased carbon storage in the ocean, has been invoked as one driver of glacial–interglacial atmospheric CO2 cycles. Ice and marine sediment records demonstrate that atmospheric dust supply to the oceans increase...
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Digital Commons @ University of South Florida
2015
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ftusouthflorida:oai:digitalcommons.usf.edu:geo_facpub-2529 2023-07-30T03:56:34+02:00 Constraints on Soluble Aerosol Iron Flux to the Southern Ocean at the Last Glacial Maximum Conway, Tim M. Wolff, E. W. Röthlisberger, R. Mulvaney, R. Elderfield, H. E. 2015-07-01T07:00:00Z application/pdf https://digitalcommons.usf.edu/geo_facpub/1490 https://doi.org/10.1038/ncomms8850 https://digitalcommons.usf.edu/context/geo_facpub/article/2529/viewcontent/ncomms8850.pdf https://digitalcommons.usf.edu/context/geo_facpub/article/2529/filename/0/type/additional/viewcontent/ncomms8850.pdf https://digitalcommons.usf.edu/context/geo_facpub/article/2529/filename/1/type/additional/viewcontent/ncomms8850_s1.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/geo_facpub/1490 doi:10.1038/ncomms8850 https://digitalcommons.usf.edu/context/geo_facpub/article/2529/viewcontent/ncomms8850.pdf https://digitalcommons.usf.edu/context/geo_facpub/article/2529/filename/0/type/additional/viewcontent/ncomms8850.pdf https://digitalcommons.usf.edu/context/geo_facpub/article/2529/filename/1/type/additional/viewcontent/ncomms8850_s1.pdf http://creativecommons.org/licenses/by/4.0/ School of Geosciences Faculty and Staff Publications Earth Sciences article 2015 ftusouthflorida https://doi.org/10.1038/ncomms8850 2023-07-13T21:56:37Z Relief of iron (Fe) limitation in the Southern Ocean during ice ages, with potentially increased carbon storage in the ocean, has been invoked as one driver of glacial–interglacial atmospheric CO2 cycles. Ice and marine sediment records demonstrate that atmospheric dust supply to the oceans increased by up to an order of magnitude during glacial intervals. However, poor constraints on soluble atmospheric Fe fluxes to the oceans limit assessment of the role of Fe in glacial–interglacial change. Here, using novel techniques, we present estimates of water- and seawater-soluble Fe solubility in Last Glacial Maximum (LGM) atmospheric dust from the European Project for Ice Coring in Antarctica (EPICA) Dome C and Berkner Island ice cores. Fe solubility was very variable (1–42%) during the interval, and frequently higher than typically assumed by models. Soluble aerosol Fe fluxes to Dome C at the LGM (0.01–0.84 mg m−2 per year) suggest that soluble Fe deposition to the Southern Ocean would have been ≥10 × modern deposition, rivalling upwelling supply. Article in Journal/Newspaper Antarc* Antarctica Berkner Island EPICA Southern Ocean University of South Florida St. Petersburg: Digital USFSP Berkner Island ENVELOPE(-48.117,-48.117,-79.333,-79.333) Southern Ocean Nature Communications 6 1 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Conway, Tim M. Wolff, E. W. Röthlisberger, R. Mulvaney, R. Elderfield, H. E. Constraints on Soluble Aerosol Iron Flux to the Southern Ocean at the Last Glacial Maximum |
topic_facet |
Earth Sciences |
description |
Relief of iron (Fe) limitation in the Southern Ocean during ice ages, with potentially increased carbon storage in the ocean, has been invoked as one driver of glacial–interglacial atmospheric CO2 cycles. Ice and marine sediment records demonstrate that atmospheric dust supply to the oceans increased by up to an order of magnitude during glacial intervals. However, poor constraints on soluble atmospheric Fe fluxes to the oceans limit assessment of the role of Fe in glacial–interglacial change. Here, using novel techniques, we present estimates of water- and seawater-soluble Fe solubility in Last Glacial Maximum (LGM) atmospheric dust from the European Project for Ice Coring in Antarctica (EPICA) Dome C and Berkner Island ice cores. Fe solubility was very variable (1–42%) during the interval, and frequently higher than typically assumed by models. Soluble aerosol Fe fluxes to Dome C at the LGM (0.01–0.84 mg m−2 per year) suggest that soluble Fe deposition to the Southern Ocean would have been ≥10 × modern deposition, rivalling upwelling supply. |
format |
Article in Journal/Newspaper |
author |
Conway, Tim M. Wolff, E. W. Röthlisberger, R. Mulvaney, R. Elderfield, H. E. |
author_facet |
Conway, Tim M. Wolff, E. W. Röthlisberger, R. Mulvaney, R. Elderfield, H. E. |
author_sort |
Conway, Tim M. |
title |
Constraints on Soluble Aerosol Iron Flux to the Southern Ocean at the Last Glacial Maximum |
title_short |
Constraints on Soluble Aerosol Iron Flux to the Southern Ocean at the Last Glacial Maximum |
title_full |
Constraints on Soluble Aerosol Iron Flux to the Southern Ocean at the Last Glacial Maximum |
title_fullStr |
Constraints on Soluble Aerosol Iron Flux to the Southern Ocean at the Last Glacial Maximum |
title_full_unstemmed |
Constraints on Soluble Aerosol Iron Flux to the Southern Ocean at the Last Glacial Maximum |
title_sort |
constraints on soluble aerosol iron flux to the southern ocean at the last glacial maximum |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2015 |
url |
https://digitalcommons.usf.edu/geo_facpub/1490 https://doi.org/10.1038/ncomms8850 https://digitalcommons.usf.edu/context/geo_facpub/article/2529/viewcontent/ncomms8850.pdf https://digitalcommons.usf.edu/context/geo_facpub/article/2529/filename/0/type/additional/viewcontent/ncomms8850.pdf https://digitalcommons.usf.edu/context/geo_facpub/article/2529/filename/1/type/additional/viewcontent/ncomms8850_s1.pdf |
long_lat |
ENVELOPE(-48.117,-48.117,-79.333,-79.333) |
geographic |
Berkner Island Southern Ocean |
geographic_facet |
Berkner Island Southern Ocean |
genre |
Antarc* Antarctica Berkner Island EPICA Southern Ocean |
genre_facet |
Antarc* Antarctica Berkner Island EPICA Southern Ocean |
op_source |
School of Geosciences Faculty and Staff Publications |
op_relation |
https://digitalcommons.usf.edu/geo_facpub/1490 doi:10.1038/ncomms8850 https://digitalcommons.usf.edu/context/geo_facpub/article/2529/viewcontent/ncomms8850.pdf https://digitalcommons.usf.edu/context/geo_facpub/article/2529/filename/0/type/additional/viewcontent/ncomms8850.pdf https://digitalcommons.usf.edu/context/geo_facpub/article/2529/filename/1/type/additional/viewcontent/ncomms8850_s1.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1038/ncomms8850 |
container_title |
Nature Communications |
container_volume |
6 |
container_issue |
1 |
_version_ |
1772813717463891968 |