Surface topography and ice flow in the vicinity of the EDML deep-drilling site, Antarctica


Contact
Christine.Wesche [ at ] awi.de

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 (75.00258°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.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
ISI/Scopus peer-reviewed
Publication Status
Published
Eprint ID
33762
Cite as
Wesche, C. , Eisen, O. , Oerter, H. , Schulte, D. and Steinhage, D. (2007): Surface topography and ice flow in the vicinity of the EDML deep-drilling site, Antarctica , Journal of Glaciology, 53 (182), pp. 442-448 .


Share

Research Platforms
N/A

Campaigns


Actions
Edit Item Edit Item