Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilisation
An extended high-resolution ice core record of dust deposition over the past 60 ka from Dome C, Antarctica, is presented. The data are in conflict with the idea that changes in aeolian iron input into the Southern Ocean were the major cause for the 80 ppm glacial-interglacial CO2 increase. During th...
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ftunivbern:oai:boris.unibe.ch:158451 2023-08-20T04:02:31+02:00 Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilisation Röthlisberger, R. Bigler, M. Wolff, E. W. Joos, F. Monnin, E. Hutterli, M. A. 2004 application/pdf https://boris.unibe.ch/158451/1/roethlisberger04grl.pdf https://boris.unibe.ch/158451/ eng eng American Geophysical Union https://boris.unibe.ch/158451/ info:eu-repo/semantics/openAccess Röthlisberger, R.; Bigler, M.; Wolff, E. W.; Joos, F.; Monnin, E.; Hutterli, M. A. (2004). Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilisation. Geophysical Research Letters, 31(16) American Geophysical Union 10.1029/2004GL020338 <http://dx.doi.org/10.1029/2004GL020338> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2004 ftunivbern https://doi.org/10.1029/2004GL020338 2023-07-31T22:08:11Z An extended high-resolution ice core record of dust deposition over the past 60 ka from Dome C, Antarctica, is presented. The data are in conflict with the idea that changes in aeolian iron input into the Southern Ocean were the major cause for the 80 ppm glacial-interglacial CO2 increase. During the deglaciation, the CO2 increase shows a linear relationship with the fall of the logarithm of the nss-Ca2+ flux, a proxy for dust deposition. However, the very large variations in the nss-Ca2+ flux related to the glacial Antarctic warm events A1 to A4 were accompanied by small CO2 variations only. Our data-based analysis suggests that decreased Southern Ocean dust deposition caused at most a 20 ppm increase in CO2 at the last glacial-interglacial transition. Rapid decreases in dust deposition to the northern Pacific could have been responsible for a maximum of 8 ppm in addition. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Southern Ocean BORIS (Bern Open Repository and Information System, University of Bern) Antarctic Pacific Southern Ocean Geophysical Research Letters 31 16 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Röthlisberger, R. Bigler, M. Wolff, E. W. Joos, F. Monnin, E. Hutterli, M. A. Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilisation |
topic_facet |
530 Physics |
description |
An extended high-resolution ice core record of dust deposition over the past 60 ka from Dome C, Antarctica, is presented. The data are in conflict with the idea that changes in aeolian iron input into the Southern Ocean were the major cause for the 80 ppm glacial-interglacial CO2 increase. During the deglaciation, the CO2 increase shows a linear relationship with the fall of the logarithm of the nss-Ca2+ flux, a proxy for dust deposition. However, the very large variations in the nss-Ca2+ flux related to the glacial Antarctic warm events A1 to A4 were accompanied by small CO2 variations only. Our data-based analysis suggests that decreased Southern Ocean dust deposition caused at most a 20 ppm increase in CO2 at the last glacial-interglacial transition. Rapid decreases in dust deposition to the northern Pacific could have been responsible for a maximum of 8 ppm in addition. |
format |
Article in Journal/Newspaper |
author |
Röthlisberger, R. Bigler, M. Wolff, E. W. Joos, F. Monnin, E. Hutterli, M. A. |
author_facet |
Röthlisberger, R. Bigler, M. Wolff, E. W. Joos, F. Monnin, E. Hutterli, M. A. |
author_sort |
Röthlisberger, R. |
title |
Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilisation |
title_short |
Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilisation |
title_full |
Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilisation |
title_fullStr |
Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilisation |
title_full_unstemmed |
Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilisation |
title_sort |
ice core evidence for the extent of past atmospheric co2 change due to iron fertilisation |
publisher |
American Geophysical Union |
publishDate |
2004 |
url |
https://boris.unibe.ch/158451/1/roethlisberger04grl.pdf https://boris.unibe.ch/158451/ |
geographic |
Antarctic Pacific Southern Ocean |
geographic_facet |
Antarctic Pacific Southern Ocean |
genre |
Antarc* Antarctic Antarctica ice core Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica ice core Southern Ocean |
op_source |
Röthlisberger, R.; Bigler, M.; Wolff, E. W.; Joos, F.; Monnin, E.; Hutterli, M. A. (2004). Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilisation. Geophysical Research Letters, 31(16) American Geophysical Union 10.1029/2004GL020338 <http://dx.doi.org/10.1029/2004GL020338> |
op_relation |
https://boris.unibe.ch/158451/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2004GL020338 |
container_title |
Geophysical Research Letters |
container_volume |
31 |
container_issue |
16 |
_version_ |
1774713001166766080 |