Nov 23, 2018

China: Alarming Glacier Retreat in XUAR and Various Regions Throughout Country, says Greenpeace

On 20 November 2018, Greenpeace International published an article on China’s melting glaciers. The organisation notes that among affected glacial areas are those in Qinghai, Gansu and Xinjiang regions. In recent months, the melting glacial packs have led to forced migration of local communities due to flooding. The glacier situated at the headwaters of the Urumqi River in the Xinjiang Uyghur Autonomous Region (XUAR), the Tianshan Glacier No. 1, has an average rate of retreat that has doubled in the last 30 years.

The article below was published by Greenpeace International:

The rate of glacier melt at key sites in western China has increased dramatically in recent decades, reveals new research from Greenpeace East Asia. Satellite data shows rapid glacier retreat at locations in Qinghai, Gansu and Xinjiang, and reveals how glacier melt caused two major disasters in western China over the past four months.

“This is a wake-up call for China and the world. Glaciers in China supply water to 1.8 billion people, and they’re melting, fast. In just the last few months, thousands of people have been evacuated from their homes due to threats of flooding. Downstream, changes in water availability are impacting agriculture and cities. It is critical that we speed up the transition away from coal and other fossil fuels and keep global average temperatures at 1.5 degrees,” said Dr. Liu Junyan, Greenpeace East Asia Climate and Energy Campaigner.

Greenpeace East Asia’s analysis of satellite imagery shows that the annual rate of retreat at Laohugou glacier, the largest in the Qilian Mountains, has more than doubled in recent decades, increasing from an average of 5.56 metres/year from 1959-1976 to 13.1 metres/year from 2006-2018.

Satellite analysis of Halong glacier, in the Anyemaqen Mountains, Qinghai reveals that the surface area is shrinking by 72,000 m2 per year. The glacier has retreated by 1200 metres in length over the last 30 years.

“I first visited these glaciers in 1983, and since then, have witnessed dramatic changes. Glacier melt has accelerated, and the frequency and intensity of glacial flooding have increased. The risk of glacial disasters is on track to increase sharply in the future, and there is a critical need for more glacial monitoring and protection for affected communities,” said Chinese Academy of Sciences research fellow Professor Shen Yongping.

The rate of retreat at Tianshan Glacier No. 1 at the headwaters of the Urumqi River in Xinjiang has also more than doubled, from an average of 5000 m2 for the period 1962-1986 to 10,600 m2 for 1986-2018, satellite analysis shows. Between 1964 and 2018, the total area decreased by 22.2%. Due to rising temperatures, the glacier split into two parts in 1993.

Over the past four months, Greenpeace has used satellite imagery to document two major disasters caused by glacier melt. On August 10, Glacial Lake Outburst Flood (GLOF) occurred in the Karakorum Mountains in Xinjiang, releasing 35 million cubic-metres of floodwater into the Yarkant River Basin and leading to the evacuation of nearby residents. On October 17, a glacier collapse released an avalanche of ice and debris into the Yarlung Zangbo River, blocking the river and leading to the evacuation of 6,600 people.

There are more than 48,000 glaciers in China, which form part of “The Third Pole,” the largest concentration of glaciers and snow outside the polar regions. Almost one-fifth of glacier area in China has already disappeared, and the volume of meltwater has increased by 53.5%.

Without serious action to limit the impacts of climate change, two thirds of glaciers in High Mountain Asia are projected to be gone by the end of the century. If the global temperature increase is capped at 1.5 degrees, two thirds of glaciers in High Mountain Asia can be saved.

Photo courtesy of Journeys On Quest @ Flickr