The search for postglacial rebound near the Lambert Glacier, Antarctica

Abstract

A GPS network has been installed to monitor vertical crustal movement in the Lambert Glacier region, East Antarctica. The program commenced in January 1998 with a solar-powered GPS system installed at Beaver Lake. Solar-powered observations were also made late in the Antarctic summer of 1999. In January 2000, two new solarpowered sites will be installed to expand the monitoring network. In addition, we will be installing a hydrogen fuel cell power system at Beaver Lake to enable the equipment to operate throughout the winter months when solar power is not available. In this paper we outline the equipment which has been developed in order to operate remote GPS equipment in Antarctica, provide predictions of the expected rate of rebound and comment on preliminary results from the data collected to date.

Identification of Glacial Isostatic Adjustment in Eastern Canada Using S Transform Filtering of GPS Observations

“…KHAN et al (2005) analyzed data from three Danish and one Swedish continuously operating GPS stations to observe the crustal deformation resulting from GIA in Denmark. Similar observations have been made for Antarctica (TREGONING et al, 2000), North America (SELLA et al, 2007;PARK et al, 2002), Scandinavia (JOHANSSON, 2002), Greenland (GREGERSEN, 2006), British Colombia (CLAGUE andJAMES, 2002), and the Great Lakes region using GPS measurements.…”

Quasi-continuous global positioning system measurements of glacial isostatic deformation in the Northern Transantarctic Mountains

“…Coates and Mt. Cocks in the Northern Transantarctic Mountains, in Marie Byrd Land (Donnellan and Luyendyk, 2004), and in the Lambert Glacier area (Tregoning et al, 2000). The uplift time series at Mt.…”

Lateral viscosity variations beneath Antarctica and their implications on regional rebound motions and seismotectonics

“…In the Lambert Glacier region (feeding the Amery Ice Shelf), Tregoning et al (1999Tregoning et al ( , 2000 have set up a GPS network in 1998, which now comprises five permanent GPS receivers, two located at the Australian stations Mawson and Davis (MAW1 and DAV1), one on the coast at Landing Bluff (LDBF), and the two sites Beaver Lake (BVLK), and Dalton's corner (DALT) further inland (see Fig. 1 for locations).…”

“…Improvements in measuring geodetic signatures reflecting the isostatic response to fluctuations in ice volume may play a prominent role in further constraining the general environmental setting of the contemporary Antarctic Ice Sheet. Here, continuous Global Positioning System (GPS) monitoring of the present-day motions and the measurement of secular changes in gravity have been proposed as an important supplementary information for ice sheet reconstructions (James and Ivins, 1995, 1998Zwartz et al, 1999;Tregoning et al, 2000;Wahr and Davis, 2002).…”