A decade of West Antarctic subglacial lake interactions from combined ICESat and CryoSat‐2 altimetry. Issue 3 (11th February 2014)

• Record Type: Journal Article
• Authors: Siegfried, Matthew R.; Fricker, Helen A.; Roberts, Mackenzie; Scambos, Ted A.; Tulaczyk, Slawek
• Is Part Of: Geophysical research letters. Volume 41:Issue 3(2014:Feb.)
• Page Start: 891
• Page End: 898
• Publication Date: 2014-02-11
• Subjects: Geophysics -- Periodicals; Planets -- Periodicals; Lunar geology -- Periodicals; 550
• DOI: 10.1002/2013GL058616
• Languages: English
• ISSNs: 0094-8276

Abstract

<abstract abstract-type="main" id="grl51297-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>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.</p> </abstract>