Chinese glaciers shrinking, supply of fresh water in decline

Updated October 21, 2018 - 5:49 pm

YULONGXUESHAN, China — The loud crack rang out from the fog above the Baishui No. 1 Glacier as a stone shard careened down the ice, flying past Chen Yanjun as he operated a GPS device.

More projectiles were tumbling down the hulk of ice that scientists say is one of the world’s fastest melting glaciers.

“We should go,” said the 30-year-old geologist. “The first rule is safety.”

Chen hiked away and onto a barren landscape once buried beneath the glacier. Now there is exposed rock littered with oxygen tanks discarded by tourists visiting the 15,000-foot-high blanket of ice in southern China.

Millions of people each year are drawn to Baishui’s frosty beauty on the southeastern edge of the Third Pole — a region in Central Asia with the world’s third largest store of ice after Antarctica and Greenland that’s roughly the size of Texas and New Mexico combined.

Third Pole glaciers are vital to billions of people from Vietnam to Afghanistan. Asia’s 10 largest rivers — including the Yangtze, Yellow, Mekong, and Ganges — are fed by seasonal melting.

“You’re talking about one of the world’s largest freshwater sources,” said Ashley Johnson, energy program manager at the National Bureau of Asian Research, an American think tank. “Depending on how it melts, a lot of the freshwater will be leaving the region for the ocean, which will have severe impacts on water and food security.”

Earth is today 1 degree Centigrade hotter than pre-industrial levels because of climate change — enough to melt 28 to 44 percent of glaciers worldwide, according to a new report by the U.N. Intergovernmental Panel on Climate Change. Temperatures are expected to keep rising.

Baishui is about as close to the Equator as Tampa, Florida. And the impacts of climate change already are dramatic.

The glacier has lost 60 percent of its mass and shrunk 820 feet since 1982, according to a 2018 report in the Journal of Geophysical Research.

Scientists found in 2015 that 82 percent of glaciers surveyed in China had retreated. They warned that the effects of glacier melting on water resources are gradually becoming “increasingly serious” for China.

“China has always had a freshwater supply problem with 20 percent of the world’s population but only 7 percent of its freshwater,” said Jonna Nyman, an energy security lecturer at the University of Sheffield. “That’s heightened by the impact of climate change.”

For years, scientists have observed global warming change Jade Dragon Snow Mountain in the Chinese province of Yunnan.

One research team has tracked Baishui’s retreat of about 30 yards per year over the past decade. Flowers, such as snow lotus, have rooted in exposed earth, says Wang Shijin, a glaciologist and director of the Yulong Snow Mountain Glacial and Environmental Observation Research Station, part of a network run by the Chinese Academy of Sciences.

Nestled into a suburb of Lijiang, population 1.2 million, the station is home to Wang and his team: geologist and drone operator Chen, postgraduate glaciology student Zhou Lanyue and electrical engineer Zhang Xing, a private contractor.

After breakfast, the team heads off by van for the day’s mission. A cable car carries them up to a majestic view of the Jade Dragon Snow Mountain.

The team shuffles past a line of tourists — many in red ponchos, most sucking oxygen canisters, a few vomiting from altitude sickness — before descending to replace a broken meteorological station.

The team operates remote sensors that collect data on temperature, wind speed, rainfall, and humidity. Other sensors measure water flow in streams fed by melted ice. Cold, downpours, rock slides, gales and glacier movement break the equipment.

“It is not easy to encounter good weather here,” Wang said.

This weather will ensure Yunnan has plenty of freshwater while other glacier loss poses serious risk of drought across the Third Pole, he said.

The next day, the team wore crampons while repairing more sensors scattered across the glacier’s crags.

“Where we’re at right now was back in 2008 all covered with ice,” Wang said. “From here to there at the side, the glacier shrank about 20 to 30 meters. The shrinking is very remarkable.”

The team forded streams and jumped crevasses in search of long iron bars they previously embedded in the ice. GPS tells them how much the bars, and thus the glacier, have moved. They also measure how much height the glacier has lost during the summer.

Back on the viewing platform, Che launched a buzzing camera drone over the white expanse. The photographs help tell a story of staggering loss. A quarter of its ice has vanished since 1957 along with four of its 19 glaciers, researchers have found.

Changes to the Baishui provide the opportunity to educate visitors about global warming, Wang said.

Last year, 2.6 million tourists visited the mountain, according to Yulong Snow Mountain park officials.

On blustery day recently, hundreds of tourists climbed wooden stairs through grey fog to snap selfies in front of the glacier.

Hou Yugang said he wasn’t too bothered over climate change and Baishui’s melting. “I don’t think about it now because it still has a long way to go,” he said.

To protect the glacier, authorities have limited the number of visitors to 10,000 a day and have banned hiking on the ice. They plan to manufacture snow and to dam streams to increase humidity that slows melting.

Security guard Yang Shaofeng has witnessed a warming world melting this mountain, which his local Naxi minority community considers sacred.

Yang remembers being able to see the glacier’s lowest edge from his home village. No longer.

“Only when we climb up can we see it,” he said sadly, as tourists lined up to have their names engraved on medallions bearing the glacier’s image.

The etching is already outdated.

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