A decade of West Antarctic subglacial lake interactions from combined ICESat and CryoSat-2 altimetry

Citation:
Siegfried, MR, Fricker HA, Roberts M, Scambos TA, Tulaczyk S.  2014.  A decade of West Antarctic subglacial lake interactions from combined ICESat and CryoSat-2 altimetry. Geophysical Research Letters. 41:891-898.

Date Published:

2014/02

Keywords:

0746 Lakes, 0758 Remote sensing, 0774 Dynamics, 0776 Glaciology, 0794 Instruments and techniques, altimetry, CryoSat-2, glacier dynamics, ice stream, ICESat, subglacial lakes

Abstract:

We use CryoSat-2 interferometric satellite radar altimetry over the Mercer and Whillans ice streams, West Antarctica, to derive surface elevation changes due to subglacial lake activity at monthly resolution for the period 2010 to 2013. We validate CryoSat-2 elevation measurements, trends, and spatial patterns of change using satellite image differencing and in situ vertical movement from Global Positioning System (GPS) data. Two subglacial lake discharge events occur in the same subglacial-hydrological catchment within a 9 month period. Using GPS measurements that are spanning the gap between the Ice, Cloud, and land Elevation Satellite and Cryosat-2 missions, we cross-calibrate the two missions to establish the efficacy of CryoSat-2 altimetry to measure dynamic changes on the ice sheets.

Notes:

n/a

Website

DOI:

10.1002/2013GL058616