News24

No ice loss in major Himalayan glaciers

2012-04-15 22:17

Paris - One of the world's biggest glacier regions has so far resisted global warming that has ravaged mountain ice elsewhere, scientists reported on Sunday.

For years, experts have debated the state of glaciers that smother nearly 20 000km² of the Karakoram range in the western Himalayas.

Straddling parts of China, Pakistan and India, the Karakoram's peaks include K2, Earth's second-highest mountain.

Its glaciers account for nearly three percent of the world's area of ice outside the ice sheets of Greenland and Antarctica.

In locations around the planet, mountain glaciers are shrinking in response to higher temperatures, contributing importantly to sea-level rise.

Yet the situation for the Karakoram has until now been sketchy.

Scientists have found it almost impossible to study the glaciers on the ground, for the region lies at great altitude in a border area, and access is hampered by snow avalanches and glacial debris.

But a French team, comparing 3-D satellite maps from 2000 and 2008, said the glaciers had not lost mass over this period and may even have grown a tiny bit, at 0.11mm per year.

"Apparently, the situation in the Karakoram is a little different [from elsewhere], which means that the glaciers are stable for the time being," Julie Gardelle of the University of Grenoble in southeastern France told AFP.

"But it does not detract in any way from the evidence for overall global warming," she cautioned.

Less heat

The paper, published in the journal Nature Geoscience, is based on satellite scrutiny of 5 615km² of the central Karakoram, between the Yarkant River on the Chinese side of the border and the Indus River on the Pakistani side.

The study area lies outside the Siachen glacier, the scene of a military stand-off between Pakistan and India, which according to the Sustainable Development Policy Institute in Islamabad has shrunk by 10km in the past 35 years.

In a commentary also carried by Nature Geoscience, Graham Cogley of Trent University in Ontario, Canada, said it was unclear why the Karakoram had so far been spared the impact of warming.

"It seems that, by a quirk of the atmospheric general circulation that is not understood, more snow is being delivered to the mountain range at present, and less heat," said Cogley.

The health of the Himalayan glaciers is closely watched, for they supply water for more than a billion people in South Asia and China.

In February, a US-led study published in Nature found that ice loss from the Himalayas was significant but had been badly over-estimated.

It calculated loss of four billion tons a year, compared with previous estimates of up to 50bn.

It said past estimates were based on run-off from lower-altitude glaciers - which are worse hit by warming than higher-altitude ones - and on drainage figures from the vast plains south of the Himalayas.

Much of this drainage came in fact from water that had been pumped from underground aquifers on the plains, not from meltwater from the mountains, the study said.

Comments
  • Stirrer - 2012-04-16 09:15

    C'mon guys, just admit it - "global warming" is just a scam for governments to slap us with more taxes. No disputing climate change, but global warming? No.

      Stirrer - 2012-04-16 10:31

      No Balstrome, just another who thinks for himself and refuses to join the sheeple.

      Ernst - 2012-04-16 11:35

      @MemeMan: Well said. @Stirrer: Did you read the article?

      Stirrer - 2012-04-16 13:30

      @Ernst - did you read (and understand) my comment? I said there's no denying climate change. Whether it's global warming, is a totally different matter. Most climatologists are steering away from using the term "global warming" lately, as there is less and less evidence of a warming trend, as this article once again proves. @MemeMan - "scientific media and the climatologists of the world are unanimous - Global Warming is a fact and humans are its root cause" - you lost all credibility right there. Once you stop following the sheep and start analyzing the facts for yourself, we might have a meaningful conversation. Until then, have a nice life.

      Ernst - 2012-04-16 14:15

      @Stirrer: "Most climatologists are steering away from using the term "global warming" lately, as there is less and less evidence of a warming trend,..." The bush administration mandated that "Global warming" be rephrased as "Climate Change" because "climate change" sounds less severe. Increasing greenhouse gas concentrations, due to the burning of fossil feuls by humans, leads to warming. Sorry you cannot explain that away. " .. as there is less and less evidence of a warming trend, as this article once again proves." The article doesnt prove that there is no warming you idiot. The Himalayan glaciers form a tiny percentage of the glaciers worldwide. If there is no melting on a tiny fraction of all the worlds glaciers, then it doesnt imply that the total ice mass, of all the glaciers put together, is not decreasing.

  • Ernst - 2012-04-16 14:20

    @Stirrer: "C'mon guys, just admit it - "global warming" is just a scam for governments to slap us with more taxes. No disputing climate change, but global warming? No." So you think that people can continue to use the atmosphere as a sewer and dump their garbage in it without having to pay for that right? "No disputing climate change, but global warming? No." Increasing greenhouse gas concentrations caused by the burning of oil, coal and gas is going to have a warming effect on the planet. This is scientific fact and denying it only exposes you for the idiot you are. Get over it.

      Stirrer - 2012-04-16 16:31

      Sheeple. Ba-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-aaaaaaa.....

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