In:
Journal of Glaciology, International Glaciological Society, Vol. 53, No. 182 ( 2007), p. 442-448
Abstract:
Interpretation of ice-core records requires accurate knowledge of the past and present surface topography and stress–strain fields. The European Project for Ice Coring in Antarctica (EPICA) drilling site (75.0025° S, 0.0684° E; 2891.7 m) in Dronning Maud Land, Antarctica, is located in the immediate vicinity of a transient and forking ice divide. A digital elevation model is determined from the combination of kinematic GPS measurements with the GLAS12 datasets from the ICESat. Based on a network of stakes, surveyed with static GPS, the velocity field around the drilling site is calculated. The annual mean velocity magnitude of 12 survey points amounts to 0.74 m a –1 . Flow directions mainly vary according to their distance from the ice divide. Surface strain rates are determined from a pentagonshaped stake network with one center point close to the drilling site. The strain field is characterized by along-flow compression, lateral dilatation and vertical layer thinning.
Type of Medium:
Online Resource
ISSN:
0022-1430
,
1727-5652
DOI:
10.3189/002214307783258512
Language:
English
Publisher:
International Glaciological Society
Publication Date:
2007
detail.hit.zdb_id:
2140541-4
SSG:
14
