Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/33914

OpenURL Link
Title
A 700-year record of atmospheric circulation developed from the Law Dome ice core, East Antarctica
Author/Creator
Souney, Joseph M.;  Mayewski, Paul A.;  Goodwin, Ian D.;  Meeker, Loren D.;  Morgan, Vin;  Curran, Mark A. J.;  van Ommen, Tas D.;  Palmer, Anne S.
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Environmental and Life Sciences
Description
A 700-year, high-resolution, multivariate ice core record from Dome Summit South (DSS) (66°46'S, 112°48'E; 1370 m), Law Dome, is used to investigate sea level pressure (SLP) variability in the region of East Antarctica. Empirical orthogonal function (EOF) analysis reveals that the first EOF (LDEOF1) of the combined glaciochemical, oxygen isotope ratio, and accumulation rate record from DSS represents most of the variability in sea salt seen in the record. LDEOF1 is positively correlated (at least 95% confidence level) to instrumental June mean SLP across most of East Antarctica. Over the last 700 years, LDEOF1 levels at Law Dome were the highest during the nineteenth century, suggesting an increase in intensification of winter circulation during this period. The Law Dome DSS oxygen isotope ratio series also indicates that the nineteenth century had the coldest winters of any century in the record. In contrast, LDEOF1 levels were the lowest at Law Dome during the eighteenth century, suggesting a significant shift in the patterns and/or intensity of East Antarctic atmospheric circulation between the eighteenth and the nineteenth centuries. The LDEOF1 sea salt record is characterized by significant decadal-scale variability with a strong 25-year periodic structure.
Relation
Journal of Geophysical Research: Atmospheres Vol. 107, Issue D22
Publisher Link
http://dx.doi.org/10.1029/2002JD002104
Date
2002
Publisher
American Geophysical Union
Keyword(s)
Dome Summit South;  empirical orthogonal function analysis;  Antarctica;  ice core record;  climate change
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/33914
Identifier
ISSN:0148-0227
Reviewed
Reviewed
52 Visitors 73 Hits 1 Downloads
Save/E-mail Citation
Citation Format
E-mail Address
Subject
"Journal of Geophysical Research: Atmospheres"
 
OR