Document Type

Conference Proceeding

Publication Title

Annals of Glaciology

Publication Date

2005

First Page

52

Last Page

56

Volume Number

41

Abstract/ Summary

Ice-core chemistry data from Victoria Lower Glacier, Antarctica, suggest, at least for the last 50 years, a direct influence of solar activity variations on the McMurdo Dry Valleys (MDV) climate system via controls on air-mass input from two competing environments: the East Antarctic ice sheet and the Ross Sea. During periods of increased solar activity, when total solar irradiance is relatively high, the MDV climate system appears to be dominated by air masses originating from the Ross Sea, leading to higher aerosol deposition. During reduced solar activity, the Antarctic interior seems to be the dominant air-mass source, leading to lower aerosol concentration in the ice-core record. We propose that the sensitivity of the MDV to variations in solar irradiance is caused by strong albedo differences between the ice-free MDV and the ice sheet.

Citation/Publisher Attribution

Bertler, NAN, Mayewski, PA, Sneed, SB, Naish, TR, Morgenstern, U, and Barrett, PJ, 2005, Solar Forcing Recorded by Aerosol Concentrations in Coastal Antarctic Glacier Ice, McMurdo Dry Valleys: Annals of Glaciology, Vol 41 2005, v. 41, p. 52-56. Available on publisher's site at: http://www.ingentaconnect.com/content/igsoc/agl/2005/00000041/00000001/art00009

Publisher Statement

© Copyright 2005 by the International Glaciological Society

DOI

10.3189/172756405781813203

Version

publisher's version of the published document

Share