Not any longer though. "It has been a source of controversy that these glaciers have not been changing while other glaciers in the world have," said Sarah Kapnick, a postdoctoral researcher at the Princeton University.

Glaciers have exhibited mass stability or even expansion in the Karakoram region contrasting with the glacial mass loss across the nearby Himalayas and Tibetan Plateau, a pattern that has been termed the Karakoram anomaly.

For the study, the researchers collected data on recent precipitation and temperatures from the Pakistan Meteorological Department and other sources, including satellite data.

They compared a set of high-resolution climate model simulations from 1861 to 2100 to focus on the distinct seasonal cycles and resulting climate change signatures in three regions of the Himalayas: the Karakoram; the central Himalayas; and the south-east Himalayas which included part of the Tibetan Plateau.

The researchers found that a new model that simulates climate down to an area of 19 square miles (50 square kilometres) was able to match the observed temperature and precipitation cycles seen in the Karakoram.

As the globe warms, precipitation increases across the Himalayas. Because of the Karakoram region's geography, it gets most of this extra moisture in the winter, when westerly winds bring snow to the mountains.

In contrast, the central and south-east Himalayan regions get most of their moisture from monsoons in the summer. Because summer is warmer, most of this precipitation falls as rain.

Previous models overestimated the temperature of the Karakoram, and underestimated the amount of snow in the region, the researchers found.

"The total amount of water that is falling from the sky is increasing during the summer months. But since the temperatures are rising above freezing, they're not translating to increased snowfall; they're actually translating to decreased snowfall in those two regions," said Kapnick.

"In Karakoram, snowfall is decreasing in the summer but increasing in the winter,"  Kapnick pointed out.

Though the researchers did not test the idea, this snowpresumably feeds Karakoram's glaciers, keeping them from retreating, Live Science reported.

The study appeared in the journal Nature Geoscience.

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