Moose and other species have advanced north with warming temperatures. University of Alaska Fairbanks assistant professor of water and environmental research Ken Tape said movement of boreal species into far northern Alaska has corresponded over the last century with earlier snow-melt and river ice out.
"It is unusual for bears with youngsters to wake up so early and it is difficult to say why these have come out. The bears may have been disturbed by humans or other animals."
Sea ice in the Chukchi Sea disappeared far earlier than normal this spring as a result of exceptionally warm ocean temperatures.
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