Mapping Ice - Arctic and Antarctic Ice Depths

Recently the European Space Agency posted imagery of sea-ice thickness from ESA’s CryoSat mission to both poles of the earth. Here is a link to a nice time series image of ice loss over three decades: http://www.esa.int/SPECIALS/Cryosat/SEMQK4908BE_1.html 

From their site:
" ...CryoSat measures the height of the sea ice above the water line, known as the freeboard, to calculate the thickness. The measurements used to generate this first map of the Arctic were from January and February 2011, as the ice approaches its annual maximum.."

"... For the first time, data from ESA’s CryoSat mission have been used

to map the height of the ice sheet that blankets Antarctica. The preliminary data used here are from February and March 2011... CryoSat's ability to map the edges of the ice sheet is demonstrated by the detail that can be seen of the flow from east Antarctica onto the Ronne-Filchner ice shelf in the west. ... [t]he outer white circle represents the limits of earlier missions and the inner circle shows that CryoSat is collecting data up 88° latitude..."

Full credit to the Map Room for bringing this to my attention.