EUROPEAN SPACE AGENCY / CPOM / UCL / SCIENCE PHOTO LIBRARY EUROPEAN SPACE AGENCY / CPOM / UCL / SCIENCE PHOTO LIBRARY
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Arctic sea ice maximum, 2011. Satellite map of Arctic sea ice thickness in January and February 2011, near its maximum extent. This data was obtained by ESA's CryoSat-2 satellite (launched April 2010) using its SIRAL-2 instrument (SAR/Interferometric Radar Altimeter). The ice thickness is colour-coded, with the key at bottom, ranging in thickness from 2 to 5 metres. Land (grey) surrounding the Arctic includes Canada, Russia and Greenland. CryoSat's polar orbit that passes over the Arctic allows ice thickness close to the North Pole to be seen for the first time. The thickest ice is here and north of Canada and Greenland.
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