Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica SCIE SCOPUS

Cited 102 time in WEB OF SCIENCE Cited 106 time in Scopus
Title
Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica
Author(s)
Lambert, F.; Bigler, M.; Steffensen, J. P.; Hutterli, M.; Fischer, H.
Publication Year
2012
Abstract
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 (nssCa(2+)), 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 nssCa(2+) 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.
ISSN
1814-9324
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3745
DOI
10.5194/cp-8-609-2012
Bibliographic Citation
CLIMATE OF THE PAST, v.8, no.2, pp.609 - 623, 2012
Publisher
COPERNICUS GESELLSCHAFT MBH
Subject
EAST ANTARCTICA; CLIMATE-CHANGE; ATMOSPHERIC CO2; OCEAN; AEROSOL; GREENLAND; EPICA; IRON; PROVENANCE; ATLANTIC
Type
Article
Language
English
Document Type
Article
Publisher
COPERNICUS GESELLSCHAFT MBH
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