Big melt up high: Himalayan glaciers ice loss doubling


WASHINGTON (AP) — Cold War era spy satellite images are showing scientists that glaciers on the Himalayas are now melting about twice as fast as they used to.

The Asian mountain range, which includes Mount Everest, has been losing ice at a rate of about 1% a year since 2000, according to a study Wednesday in the journal Science Advances .

“The amount of ice (lost) is scary but what is much more scary is the doubling of the melt rate,” said Josh Maurer, a glacier researcher at Columbia University’s Lamont Doherty Earth Observatory and lead author of the study.

The Himalayas, part of an area that is referred to as “The Third Pole” because it has so much ice, has only 72% of the ice that was there in 1975. It has been losing about 8.3 billion tons (7.5 billion metric tons) of ice a year, compared 4.3 billion tons (3.9 billion metric tons) a year between 1975 and 2000, according to the study.

The Himalayan melt doesn’t contribute much to sea level rise, Mauer said, because it is dwarfed by melting in Greenland and Antarctica. But the loss of the ice means current and future disruptions of water supplies — both surges and shortages — for the hundreds of millions of people in the region who rely on it for hydropower, agriculture, and drinking, said study co-author Jorg Schaefer, a climate geochemistry professor at Columbia.

Hollywood Star's Wife Played Key Role in International Criminal Court's Arrest Warrant for Israeli Leaders

“Disaster is in the making here,” Schaefer said.

Scientists lacked some critical data on ice in the Himalayas until Maurer found once-classified 3D images from U.S. spy satellites that had been put online. Those images allowed Maurer to calculate how much ice was on the Himalayas in 1975. He then used other satellite data to measure ice in 2000 and then again in 2016.

Past research looked at individual Himalayan glaciers over short time periods, but this is the first to look at the big picture — 650 glaciers over decades, Schaefer said.

For years, scientists have looked at many possible causes for melting glaciers, including pollution and changes in rainfall. But when the team was able to see trends using long-term data, they found the major culprit: “it’s clear it’s temperature and everything else doesn’t matter as much,” Schaefer said.

Maurer double-checked that conclusion by feeding the data into a computer model. It “predicted” the same type of ice melt that happened over the four decades.

NASA climate scientist Josh Willis, who wasn’t part of the study, said it provided important confirmation of what scientists suspected and what models showed.

“As a scientist it’s nice to hear that we’re right, but then again as a civilian it’s sometimes a little scary to hear that we’re right,” Willis said.


Follow Seth Borenstein on Twitter: @borenbears .

Daughter of American Who Vanished in 2017 Reveals Devastating Update US Intel Gave Her


The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content.

The Western Journal has not reviewed this Associated Press story prior to publication. Therefore, it may contain editorial bias or may in some other way not meet our normal editorial standards. It is provided to our readers as a service from The Western Journal.

Truth and Accuracy

Submit a Correction →

We are committed to truth and accuracy in all of our journalism. Read our editorial standards.

The Associated Press is an independent, not-for-profit news cooperative headquartered in New York City. Their teams in over 100 countries tell the world’s stories, from breaking news to investigative reporting. They provide content and services to help engage audiences worldwide, working with companies of all types, from broadcasters to brands. Photo credit: @AP on Twitter
The Associated Press was the first private sector organization in the U.S. to operate on a national scale. Over the past 170 years, they have been first to inform the world of many of history's most important moments, from the assassination of Abraham Lincoln and the bombing of Pearl Harbor to the fall of the Shah of Iran and the death of Pope John Paul.

Today, they operate in 263 locations in more than 100 countries relaying breaking news, covering war and conflict and producing enterprise reports that tell the world's stories.
New York City