ANCHORAGE -

The National Climate Assessment says temperatures in Alaska are projected to warm by 6 to 8 degrees in the north and 4 to 6 degrees in the rest of the state by the end of this century.

The report says the changes are part of a global climate change “which is primarily driven by human activity.”

"It makes a lot of sense that we are probably contributing to that, but to what extent is probably an unanswerable question,” said Alaska’s climatologist, Dr. Peter Olsson.

Olsson says there may be other factors at play, including the ocean warming phenomenon known as El Nino.

The report says over the past 60 years, Alaska warmed more than twice as rapidly as the rest of the U.S.  It also predicts sea levels will rise 1 to 4 feet and summer ice will disappear by the mid-2030s.

Some residents living on St. Lawrence Island in the Bering Sea have noticed sea ice is thinner than usual.

"There are some changes, and I think it is just Mother Nature doing her job,” said Savoonga resident Frederick Kingkeekuk.

Critics blasted the timing of the report’s release as election-year politics.

"Even if we were to enact the kind of national energy regulations the president seems to want so badly, it would be unlikely to meaningfully impact global emissions anyway unless other major industrial nations do the same thing,” said Senate Minority Leader Mitch McConnell (R-Ky.).

Olsson says the report did not address the cause of extreme weather events in Southcentral Alaska, including rain and ice storms in the Anchorage area.