Publication Date:
2019-07-16
Description:
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 (75.00258°S, 0.06848°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 0.74ma–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.
Repository Name:
EPIC Alfred Wegener Institut
Type:
Article
,
isiRev
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