facebook
twitter
rss
account
search
search
 

Temperature said driving retreat of Peruvian glaciers in high Andes

Feb. 25, 2014 at 7:01 PM   |   Comments

HANOVER, N.H., Feb. 25 (UPI) -- Temperature, not variations in snowfall, is causing the dramatic shrinkage of Peru's Quelccaya Ice Cap, a symbol of global climate change, a U.S. study found.

Researchers at Dartmouth College used field mapping combined with the dating methods and ice cores to examine how the ice cap -- the largest ice mass in the tropics -- has expanded and retreated over the past millennium, the university reported Tuesday.

An analysis suggests temperature has been the driving force behind the glacial expansion and retreat of the ice cap 18,000 feet above sea level in the Peruvian Andes.

"This is an important result since there has been debate about the causes of recent tropical glacial recession -- for example, whether it is due to temperature, precipitation, humidity, solar irradiance or other factors," study co-author Meredith Kelly said. "This result agrees with ... earlier suggestions that these tropical glaciers are shrinking very rapidly today because of a warming climate."

The advances and retreats of other glaciers in tropical South America are similar to those of the Peruvian ice cap, indicating a regionally consistent pattern of past climate conditions, the researchers said.

© 2014 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
Most Popular
1
Earth's magnetic field may soon flip, according to new data Earth's magnetic field may soon flip, according to new data
2
Wisconsin shuts down three wolf hunting zones, two remain open Wisconsin shuts down three wolf hunting zones, two remain open
3
Deforestation in the Amazon has increased 190 percent, satellites show Deforestation in the Amazon has increased 190 percent, satellites show
4
Three Mars probes hide behind planet, avoid comet debris Three Mars probes hide behind planet, avoid comet debris
5
Japanese man who 3D printed guns sentenced to two years in prison Japanese man who 3D printed guns sentenced to two years in prison
Trending News
Around the Web
x
Feedback