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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ftunisfloridatam:oai:digitalcommons.usf.edu:geo_facpub-2529 2023-05-15T13:34:05+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://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2529&context=geo_facpub unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/geo_facpub/1490 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2529&context=geo_facpub http://creativecommons.org/licenses/by/4.0/ CC-BY School of Geosciences Faculty and Staff Publications Earth Sciences article 2015 ftunisfloridatam 2021-10-09T07:47:33Z 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 Digital Commons University of South Florida (USF) Southern Ocean Berkner Island ENVELOPE(-48.117,-48.117,-79.333,-79.333) |
institution |
Open Polar |
collection |
Digital Commons University of South Florida (USF) |
op_collection_id |
ftunisfloridatam |
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://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2529&context=geo_facpub |
long_lat |
ENVELOPE(-48.117,-48.117,-79.333,-79.333) |
geographic |
Southern Ocean Berkner Island |
geographic_facet |
Southern Ocean Berkner Island |
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 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2529&context=geo_facpub |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766048683508367360 |