3D altitude maps captured by satellites show glaciers in part of the greater Himalaya range are bucking the global trend of continued ice loss
The glaciers flowing between the towering peaks of the Karakoram range on the Pakistan-China border have grown in size in the last decade, according to new research.
The impact of climate change on the ice in the greater Himalaya range has been controversial because of an unfounded claim by the United Nations’ climate science panel over the rate of melting in the region. However the melting of vast volumes of ice into the sea in most other parts of the world has been clearly demonstrated. In March, scientists showed that far less ice was being lost across the Himalayas than had been estimated from sparse ground surveys on the remote slopes.
The new study shows that glaciers in one important part of the mountain range are growing. “We provide a detailed glacier-scale evaluation of mass changes in the central Karakoram,” said Julie Gardelle, at CNRS-Université Grenoble, who led the research published in Nature Geoscience on Sunday. “In our warming world, there are regions of the Earth where, for a few years or decades, the atmosphere is not warming or is even cooling. So it is not really a big surprise that there are some regions where the temperature is not rising and the Karakoram may be one of those.”
The scientists used 3D altitude maps obtained from satellites in 2000 and 2008 to track the changes in the glaciers. Prof Graham Cogley, of Trent University in Canada, who was not part of the research team, called the approach a “ground-breaking” advance.