“The Arctic has warmed twice as fast as the rest of the globe in the past two decades. Sea ice in this region is melting into the ocean so rapidly that its rate exceeds most model projections. The consequences of a world with less sea ice, argue the authors of this Review, include amplification of the warming phenomenon: less sea ice means fewer surfaces to reflect sun back into the atmosphere. Thus, loss of sea ice is not just an indicator of warming, but a contributor to it as well.
Read more about this research from the 2 August issue of Science here.”
“Climatologist Jason Box has a radical theory why…
In 2009, he announced the Petermann glacier, one of the largest in Greenland, would break up that summer – a potent sign of how fast the Arctic was warming. Most glaciologists thought he was nuts – especially after the summer passed and nothing happened. In 2010, however, Petermann began to calve; two years later, it was shedding icebergs twice the size of Manhattan. Another example: In early 2012, Box predicted there would be surface melting across the entirety of Greenland within a decade. Again, many scientists dismissed this as alarmist claptrap. If anything, Box was too conservative – it happened a few months later. He also believes that the climate community is underestimating how much sea levels could rise in the coming decades.
…Box decided to return to Greenland this summer – his 24th trip here in the past 20 years – to test a more startling hypothesis, part of what he calls “a unified theory” of glaciology: that tundra fires in Canada, massive wildfires in Colorado and pollution from coal-fired power plants in Europe and China had sent an unexpectedly thick layer of soot over the Arctic region last summer, which settled onto Greenland’s vast frozen interior, increasing the amount of sunlight the snow and ice absorbed, which in turn accelerated the melting.”