The Tibetan plateau has been called “the roof of the world” and “the third pole” for its ice-covered peaks. There, global warming is happening faster than at other, lower altitudes, with serious consequences for hundreds of millions of people.
China’s lowest glacier, the Mingyong glacier — an enormous, dirty, craggy mass of ice wedged in a mountain valley 8,900 feet above sea level — is melting. And as it melts, the glacier on the edge of the Tibetan plateau is retreating up the mountain faster than experts can believe.
“It’s truly amazing how much it’s traveled,” says Barry Baker of The Nature Conservancy, part of a team of international scientists who recently visited the shrinking glacier. “It is just unbelievable.”
Baker has been tracking the glacier’s retreat for the past five years. He is flabbergasted by the difference since his last visit two years ago.
“The change is actually really remarkable,” he says. “The glacier looks like it’s gone back up the valley at least 300 feet in just the last two years.”
An Astonishing Increase
Baker says the rate of retreat is increasing quickly.
“When we first started observing this glacier, it was retreating at about 80 feet per year, and now it looks like it’s doubled,” he says.
To explain the change, he cites an increase in temperatures.
“We’ve seen just in this area about a 2.2 degree increase in temperature just in the last 20 years. And it’s interesting because it seems like, from the climate data that we’ve been studying, that this region is warming faster than some of the other parts of China. In fact, from the data that we have, this particular region is warming almost twice as fast as China,” he says.
The scientists must scramble over the rocky debris, known as the moraine — left behind after the ice has melted — to move closer to the snout, or lower end, of the glacier. Studying this ice mass is extremely difficult because local Tibetans see it as a sacred glacier, and they have banned people from touching or stepping on the ice. That rules out normal scientific practices like removing ice cores and sinking stakes in the ice to measure its retreat.
The scientists have to depend on GPS measurements and repeat photography. In this, they are lucky — because explorer Frank Kingdon-Ward snapped pictures of the glacier as early as 1913. Anecdotal evidence indicates the glacier has retreated 1 1/2 miles since the late 1800s, when its tongue was close to Mingyong village.
More: ➡