EUROPEAN SPACE AGENCY / SCIENCE PHOTO LIBRARY EUROPEAN SPACE AGENCY / SCIENCE PHOTO LIBRARY
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Open Northwest Passage, Arctic Ocean. Satellite image showing the McClure Strait in the Canadian Arctic Archipelago, a section of the Northwest Passage that connects the Atlantic and Pacific Oceans. Sea ice is shown in green, the recession of which has made this strait the most direct route of the Northwest Passage since it became fully open in August 2007. Declining sea ice is due to global warming, the Arctic temperature having risen by 1.7-2.2 degrees Celsius in the past century. Photographed on 31st August 2007 by the Advanced Synthetic Aperture Radar (ASAR) instrument aboard ESA's Envisat satellite.
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