Ice Bridge’s 2010 Arctic campaign is in full swing. This spring researchers from NASA, University of Kansas, and Columbia University are flying over the Arctic, monitoring sea ice, ice sheets, and glaciers to provide a continuous look at how Arctic ice is changing. The campaign's first priority is to survey Arctic sea ice, which reaches its maximum extent just as spring begins. The amount of sea ice covering the Arctic at the end of each winter is an important indication of the health of the Arctic and Earth's climate system. Credit: NASA