The extent of the sea ice covering the Arctic Ocean has shrunk. According to scientists from NASA and the NASA-supported National Snow and Ice Data Center (NSIDC) in Boulder, Colo., the amount is the smallest size ever observed in the three decades since consistent satellite observations of the polar cap began. The panelists for the briefing are: Joey Comiso, senior research scientist, Goddard and Walt Meier, research scientist, NSDIC. A video is available on our web site.