The End of Cold, 2018: Arctic Mountain Glaciers Melting Rapidly


Alex Wierbinski's picture

By Alex Wierbinski - Posted on 11 April 2018

 

The End of Cold

Arctic Mountain Glaciers Melting Rapidly

Melting of Arctic mountain glaciers unprecedented in the past 400 years,
American Geophysical Union, April 10, 2018.

"Glaciers in Alaska's Denali National Park are melting faster than at any time in the past four centuries because of rising summer temperatures."

"...ice cores taken from the summit of Mt. Hunter in Denali National Park show summers there are least 1.2-2 degrees Celsius (2.2-3.6 degrees Fahrenheit) warmer than summers were during the 18th, 19th, and early 20th centuries. The warming at Mt. Hunter is about double the amount of warming that has occurred during the summer at areas at sea level in Alaska over the same time period."

"The warmer temperatures are melting 60 times more snow from Mt. Hunter today than the amount of snow that melted during the summer before the start of the industrial period 150 years ago."

"The new study's results show the Alaska Range has been warming rapidly for at least a century."

"The warming correlates with hotter temperatures in the tropical Pacific Ocean...Previous research has shown the tropical Pacific has warmed over the past century due to increased greenhouse gas emissions."

"The natural climate system has changed since the onset of the anthropogenic era...In the North Pacific, this means temperature and precipitation patterns are different today than they were during the preindustrial period."

"...melt events occur 57 times more frequently today than they did 150 years ago."

"They found during years with more melt events on Mt. Hunter, tropical Pacific temperatures were higher. The researchers suspect warmer temperatures in the tropical Pacific Ocean amplify warming at high elevations in the Arctic by changing air circulation patterns. Warmer tropics lead to higher atmospheric pressures and more sunny days over the Alaska Range, which contribute to more glacial melting in the summer."

 

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