Extraction of Arctic Sea Ice Thickness from Envisat Altimetry Data
Andrew Ridout(1) and Seymour Laxon(1)
University College London,
London WC1E 6BT,
Radar altimetry data from the ERS-1 and ERS-2 satellites has been used to obtain a continuous time series of Arctic sea ice thickness to 81.5 degrees North going back to 1993. Since its launch in March 2002, the radar altimeter on board the Envisat satellite has continued observing Arctic sea ice from space and this poster shows how the method of extracting ice thinknesses from altimetry data was extended to Envisat data.
The poster shows how the Envisat results have been cross-calibrated with those from ERS-2 by comparison of sea level anomaly, ice elevation and freeboard maps. It also includes some preliminary validation results with in situ data as well as a comparison of Envisat derived elevations with GPS over the Salar de Uyuni.