Saturday September 21, 2019

Glaciers are Melting Much Faster than Scientists Thought

A new study shows they are losing 369 billion tons of snow and ice each year, more than half of that in North America.

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global warming, glaciers
FILE -An ice crevasse is seen on the Baishui Glacier No. 1, the world's fastest melting glacier due to its proximity to the Equator, on the Jade Dragon Snow Mountain in the southern province of Yunnan in China, Sept. 22, 2018. VOA

Earth’s glaciers are melting much faster than scientists thought. A new study shows they are losing 369 billion tons of snow and ice each year, more than half of that in North America.

The most comprehensive measurement of glaciers worldwide found that thousands of inland masses of snow compressed into ice are shrinking 18 percent faster than an international panel of scientists calculated in 2013.

The world’s glaciers are shrinking five times faster now than they were in the 1960s. Their melt is accelerating due to global warming, and adding more water to already rising seas, the study found.

“Over 30 years suddenly almost all regions started losing mass at the same time,” said lead author Michael Zemp, director of the World Glacier Monitoring Service at the University of Zurich. “That’s clearly climate change if you look at the global picture.”

global warming, glaciers
The Collins glacier on King George Island has retreated in the last 10 years and shows signs of fragility, in the Antarctic, Feb. 2, 2018. VOA

The glaciers shrinking fastest are in central Europe, the Caucasus region, western Canada, the U.S. Lower 48 states, New Zealand and near the tropics. Glaciers in these places on average are losing more than 1 percent of their mass each year, according to a study in Monday’s journal Nature.

“In these regions, at the current glacier loss rate, the glaciers will not survive the century,” Zemp said.

Zemp’s team used ground and satellite measurements to look at 19,000 glaciers, far more than previous studies. They determined that southwestern Asia is the only region of 19 where glaciers are not shrinking, which Zemp said is due to local climate conditions.

Since 1961, the world has lost 10.6 trillion tons of ice and snow (9.6 trillion metric tons), the study found. That’s enough to cover the lower 48 U.S. states in about 4 feet of ice.

Scientists have known for a long time that global warming caused by human activities like burning coal, gasoline and diesel for electricity and transportation is making Earth loose its ice. They have been especially concerned with the large ice sheets covering Greenland and Antarctica.

This study, “is telling us there’s much more to the story,” said Mark Serreze, director of the National Snow and Ice Data Center in Boulder, Colorado, who wasn’t part of the study. “The influence of glaciers on sea level is bigger than we thought.”

A number of factors are making sea levels rise. The biggest cause is that oceans are getting warmer, which makes water expand. The new figures show glacier melt is a bigger contributor than thought, responsible for about 25% to 30% of the yearly rise in oceans, Zemp said.

Rising seas threaten coastal cities around the world and put more people at risk of flooding during storms.

glaciers, global warming
The suns sets against an iceberg floating in the Nuup Kangerlua Fjord near Nuuk in southwestern Greenland, Aug. 1, 2017. Greenland’s glaciers have been melting and retreating at an accelerated pace in recent years due to warmer temperatures. VOA

Glaciers grow in winter and shrink in summer, but as the Earth has warmed, they are growing less and shrinking more. Zemp said warmer summer temperatures are the main reason glaciers are shrinking faster.

While people think of glaciers as polar issues, shrinking mountain glaciers closer to the equator can cause serious problems for people who depend on them, said Twila Moon, a snow and ice data center scientist who also wasn’t part of the study. She said people in the Andes, for example, rely on the glaciers for drinking and irrigation water each summer.

ALSO READ: Solar Installation in Massachusetts to Fight Climate Change

A separate study Monday in Environmental Research Letters confirmed faster melting and other changes in the Arctic. It found that in winter, the Arctic is warming 2.8 times faster than the rest of the Northern Hemisphere. Overall, the region is getting more humid, cloudier and wetter.

“It’s on steroids, it’s hyperactive,” said lead author Jason Box, a scientist for the Danish Meteorological Institute. (VOA)

Next Story

The UN Headquarters To Be Powered With Green Electricity From Gandhi Solar Park Gifted by India

The UN headquarters will be powered with green electricity when the Gandhi Solar Park gifted by India comes online on September 24

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UN, India, Solar Park, Climate, Global Warming
The installation costing about $1 million will generate 50 kilowatts of electricity from the 193 solar panels. Pixabay

The UN headquarters will be powered with green electricity when the Gandhi Solar Park gifted by India comes online on September 24 symbolising New Delhi’s commitment to fighting climate change.

The installation costing about $1 million will generate 50 kilowatts of electricity from the 193 solar panels, each representing a UN member nation.

India is also donating a Gandhi Peace Garden made up of 150 trees, which will be located at a university campus in Old Westbury as another environmental gift.

The two gifts that come in the year of the 150th anniversary of Mahatma Gandhi’s birth showcase two elements in the fight against climate change: Generating green energy from renewable resources through the solar park and using the trees to sequester (or capture back from the environment) carbon emissions that contribute to global warming.

UN, India, Solar Park, Climate, Global Warming
The UN will also be releasing a special stamp on Tuesday to commemorate Gandhi’s birth anniversary. Wikimedia Commons

The gifts mesh in with the focus of the high-level meetings of the UN General Assembly this year — fighting climate change, which Secretary-General Antonio Guterres has called a “battle for our lives”.

ALSO READ: The Mayors Announce Their Support For Climate Change Strike

The UN will also be releasing a special stamp on Tuesday to commemorate Gandhi’s birth anniversary. (IANS)