Obama to see effects of global warming
Obama to visit state for conference on climate change.
President to embark on three-day visit to Alaska, where he will see damage caused by climate change.
ANCHORAGE, ALASKA — Global warming is carving measurable changes into Alaska, and President Barack Obama is about to see it.
Obama leaves today for a three-day visit to the 49th state. He will speak at a State Department climate change conference and become the fifirst president to visit the Alaska Arctic. There, and in the sub-Arctic part of the state, he will see the damage caused by warming — damage that has been evident to scientists for years.
More than 3.5 trillion tons of water have melted of off Alaska’s glaciers since 1959, when Alaska fifirst became a state, studies show — enough to fill more than 1 billion Olympic-sized pools. The crucial, coast-hugging sea ice that protects villages from storms and makes hunting easier is dwindling in summer and is now absent each year a month longer than it was in the 1970s, other studies fifind. The Army Corps of Engineers identifified 26 villages where erosion linked to sea ice loss threatens the communities’ existence.
Permafrost is thawing more often as the ground warms, so as the ground oozes, roads, pipelines and houses’ foundations tilt and shift — sometimes enough to cause homes to be abandoned. In far northern Barrow, the upper part of the ground is 7 degrees warmer than it was in the late 1950s and getting closer to the melt point in the summer, data shows. And scientists fear the thawing permafrost will unleash large amounts of trapped greenhouse gases and speed up worldwide warming.
So far this year, more than 5.1 million acres in Alaska — an area the size of Connecticut and Rhode Island combined — have burned in wildfifires. In the fifirst 10 years of statehood, Alaska averaged barely a quarter million acres of wildfifires yearly. The last 10 years have averaged 1.2 million acres.
“The state is changing and changing rapidly,” said Fran Ulmer, chairwoman of the U.S. Arctic Research Commission and Alaska’s former lieutenant governor. And sci- entists say those things are happening — at least partly and probably mostly — because of another thing they can measure: Alaska’s temperature. Alaska’s yearly average temperature has jumped 3.3 degrees since 1959 and the winter average has spiked 5 degrees since statehood, according to federal records. Last year was the hottest on record and so far this year Alaska is a full degree warmer than last year. Alaska “is sort of a bellwether,” said John Walsh, chief scientist of the International Arctic Research Center at the University of Alaska Fairbanks. “The changes are defifinitely happening and we’re out in front of the rest of the country.”
And what happens in Alaska isn’t staying in Alaska, because weather changes in the Arc- tic trigger changes in the jet stream and reverberate down south, including the dreaded polar vortex escape that has brought sub-freezing temperatures to great expanses of North American in recent winters, said Martin Jeffries, an Arctic scientist for the U.S. Offiffice of Naval Research.
Warming’s effects seem to be speeding up. From 1959 to 1993, Alaska’s glaciers lost 57 billion tons of ice a year, but that jumped to almost 83 billion tons a year since 1994, according to Anthony Arendt, who co-authored a study on the subject this July.
And while there may be many factors involved in glacier melt, all but about fifive of Alaska’s 25,000 glaciers are shrinking, said University of Alaska Fairbanks glacier expert Regine Hock.