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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Online Access: | https://doi.org/10.5194/cp-8-609-2012 https://cp.copernicus.org/articles/8/609/2012/ |
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fttriple:oai:gotriple.eu:SvluyjJ4izcXayoVi5JHw 2023-05-15T13:38:29+02:00 Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica Centennial mineral dust variability in high-resolution core data from Dome C, Antarctica Lambert, F. Bigler, M. Steffensen, J. P. Hutterli, M. Fischer, H. 2018-09-27 https://doi.org/10.5194/cp-8-609-2012 https://cp.copernicus.org/articles/8/609/2012/ en eng Copernicus Publications doi:10.5194/cp-8-609-2012 10670/1.4witqm 1814-9324 1814-9332 https://cp.copernicus.org/articles/8/609/2012/ undefined Geographica Helvetica - geography eISSN: 1814-9332 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/cp-8-609-2012 2023-01-22T17:52:53Z 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 Unknown Antarctic Southern Ocean Climate of the Past 8 2 609 623 |
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English |
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geo envir Lambert, F. Bigler, M. Steffensen, J. P. Hutterli, M. Fischer, H. Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica |
topic_facet |
geo envir |
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 |
Lambert, F. Bigler, M. Steffensen, J. P. Hutterli, M. Fischer, H. |
author_facet |
Lambert, F. Bigler, M. Steffensen, J. P. Hutterli, M. Fischer, H. |
author_sort |
Lambert, F. |
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 |
2018 |
url |
https://doi.org/10.5194/cp-8-609-2012 https://cp.copernicus.org/articles/8/609/2012/ |
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_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-8-609-2012 10670/1.4witqm 1814-9324 1814-9332 https://cp.copernicus.org/articles/8/609/2012/ |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-8-609-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
2 |
container_start_page |
609 |
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623 |
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1766106707353665536 |