Document Type

Conference Proceeding

Publication Title

Annals of Glaciology

Publication Date

2002

First Page

102

Last Page

106

Volume Number

35

Abstract/ Summary

Snow-accumulation rates and rates of ice-thickness change (mass balance) are studied at several sites on Siple Dome, West Antarctica. Accumulation rates are derived from analyses of gross beta radioactivity in shallow firn cores located along a 60 km transect spanning both flanks and the crest of the dome. There is a north-south gradient in snow-accumulation rate across the dome that is consistent with earlier radar mapping of internal stratigraphy. Orographic processes probably control this distribution. Mass balance is inferred from the difference between global positioning system (GPS)-derived vertical velocities and snow-accumulation rates for sites close to the firn-core locations. Results indicate that there is virtually no net thickness change at four of the five sites. The exception is at the northernmost site where a small amount of thinning is detected, that appears to be inconsistent with other studies. A possible cause of this anomalous thinning is recent retreat of the grounding line of Ice Stream D.

Citation/Publisher Attribution

Hamilton, GS, 2002, Mass Balance and Accumulation Rate Across Siple Dome, West Antarctica: Annals of Glaciology, Vol 35, v. 35, p. 102-106. Available on publisher's site at: http://www.ingentaconnect.com/content/igsoc/agl/2002/00000035/00000001/art00019

Publisher Statement

© Copyright 2002 by the International Glaciological Society

DOI

10.3189/172756402781816609

Version

publisher's version of the published document

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