Static GPS measurements and elevation model in the vicinity of the EDML deep-drilling site

• Main Authors: Wesche, Christine, Eisen, Olaf, Oerter, Hans, Schulte, Daniel, Steinhage, Daniel
• Format: Other/Unknown Material
• Language: English
• Published: PANGAEA 2007
• Subjects: AWI_Glac; EDML; EDRILL; EPICA; EPICA-Campaigns; EPICA drill; EPICA Dronning Maud Land; DML28C01_00; European Project for Ice Coring in Antarctica; Glaciology @ AWI; Kohnen Station; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; SPP1158; Antarc*; Antarctic; Antarctica; Dronning Maud Land; ice core; Journal of Glaciology; Sea ice
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.611331; https://doi.org/10.1594/PANGAEA.611331

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 (0.0684° E and 75.0025° S, 2891.7 m) in Dronning Maud Land, Antarctica, is located in the immediate vicinity of a transient and splitting ice divide. A digital elevation model is determined from the combination of kinematic GPS measurements with the GLAS12 data sets from the ICESat satellite. Based on a network of stakes, surveyed with static GPS, the velocity field around the EDML drilling site is calculated. The annual mean velocity magnitude of 12 survey points amounts to 0.74 m/a. Flow directions mainly vary according to their distance from the ice divide. Surface strain rates are determined from a pentagon-shaped stake network with one center point, close to the drilling site. The strain field is characterised by along flow compression, lateral dilatation, and vertical layer thinning.