Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica
Ice core data from Antarctica provide detailed insights into the characteristics of past climate, atmospheric circulation, as well as changes in the aerosol load of the atmosphere. We present high-resolution records of soluble calcium (Ca2+), non-sea-salt soluble calcium (nssCa2+), and particulate m...
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ftdatacite:10.7892/boris.18148 2023-05-15T13:59:40+02:00 Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica Hutterli, M. Lambert, F. Steffensen, J.P. Bigler, M. Fischer, H. 2012 application/pdf https://dx.doi.org/10.7892/boris.18148 http://boris.unibe.ch/18148/ en eng Copernicus Publications info:eu-repo/semantics/openAccess CreativeWork article 2012 ftdatacite https://doi.org/10.7892/boris.18148 2021-11-05T12:55:41Z Ice core data from Antarctica provide detailed insights into the characteristics of past climate, atmospheric circulation, as well as changes in the aerosol load of the atmosphere. We present high-resolution records of soluble calcium (Ca2+), non-sea-salt soluble calcium (nssCa2+), and particulate mineral dust aerosol from the East Antarctic Plateau at a depth resolution of 1 cm, spanning the past 800 000 years. Despite the fact that all three parameters are largely dust-derived, the ratio of nssCa2+ to particulate dust is dependent on the particulate dust concentration itself. We used principal component analysis to extract the joint climatic signal and produce a common high-resolution record of dust flux. This new record is used to identify Antarctic warming events during the past eight glacial periods. The phasing of dust flux and CO2 changes during glacial-interglacial transitions reveals that iron fertilization of the Southern Ocean during the past nine glacial terminations was not the dominant factor in the deglacial rise of CO2 concentrations. Rapid changes in dust flux during glacial terminations and Antarctic warming events point to a rapid response of the southern westerly wind belt in the region of southern South American dust sources on changing climate conditions. The clear lead of these dust changes on temperature rise suggests that an atmospheric reorganization occurred in the Southern Hemisphere before the Southern Ocean warmed significantly. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Southern Ocean |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
Ice core data from Antarctica provide detailed insights into the characteristics of past climate, atmospheric circulation, as well as changes in the aerosol load of the atmosphere. We present high-resolution records of soluble calcium (Ca2+), non-sea-salt soluble calcium (nssCa2+), and particulate mineral dust aerosol from the East Antarctic Plateau at a depth resolution of 1 cm, spanning the past 800 000 years. Despite the fact that all three parameters are largely dust-derived, the ratio of nssCa2+ to particulate dust is dependent on the particulate dust concentration itself. We used principal component analysis to extract the joint climatic signal and produce a common high-resolution record of dust flux. This new record is used to identify Antarctic warming events during the past eight glacial periods. The phasing of dust flux and CO2 changes during glacial-interglacial transitions reveals that iron fertilization of the Southern Ocean during the past nine glacial terminations was not the dominant factor in the deglacial rise of CO2 concentrations. Rapid changes in dust flux during glacial terminations and Antarctic warming events point to a rapid response of the southern westerly wind belt in the region of southern South American dust sources on changing climate conditions. The clear lead of these dust changes on temperature rise suggests that an atmospheric reorganization occurred in the Southern Hemisphere before the Southern Ocean warmed significantly. |
format |
Article in Journal/Newspaper |
author |
Hutterli, M. Lambert, F. Steffensen, J.P. Bigler, M. Fischer, H. |
spellingShingle |
Hutterli, M. Lambert, F. Steffensen, J.P. Bigler, M. Fischer, H. Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica |
author_facet |
Hutterli, M. Lambert, F. Steffensen, J.P. Bigler, M. Fischer, H. |
author_sort |
Hutterli, M. |
title |
Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica |
title_short |
Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica |
title_full |
Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica |
title_fullStr |
Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica |
title_full_unstemmed |
Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica |
title_sort |
centennial mineral dust variability in high-resolution ice core data from dome c, antarctica |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://dx.doi.org/10.7892/boris.18148 http://boris.unibe.ch/18148/ |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica ice core Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica ice core Southern Ocean |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.7892/boris.18148 |
_version_ |
1766268330328457216 |