June 22: Scientists have warned that the Himalayan glaciers providing critical water to nearly two billion people are melting faster than ever before due to climate change. This has exposing communities to unpredictable and costly disasters, the AFP said Tuesday citing a report prepared by the International Centre for Integrated Mountain Development (ICIMOD).

The glaciers disappeared 65 percent faster from 2011 to 2020 compared to the previous decade, according to the ICIMOD report.

"As it gets warmer, ice will melt, that was expected, but what is unexpected and very worrying is the speed," lead author Philippus Wester told AFP. "This is going much faster than we thought."

Glaciers in the Hindu Kush Himalaya (HKH) region are a crucial water source for around 240 million people in the mountainous regions, as well as for another 1.65 billion people in the river valleys below, the report said.

Based on current emissions trajectories, the glaciers could lose up to 80 percent of their current volume by the end of the century, said the Nepal-based ICIMOD, an inter-governmental organisation that also includes member countries Afghanistan, Bangladesh, Bhutan, China, India, Myanmar and Pakistan.

According to the AFP. These Himalayan glaciers feed 10 of the world's most important river systems, including the Ganges, Indus, Yellow, Mekong and Irrawaddy, and directly or indirectly supply billions of people with food, energy, clean air and income.

"With two billion people in Asia reliant on the water that glaciers and snow here hold, the consequences of losing this cryosphere (a frozen zone) are too vast to contemplate," AFP quoted ICIMOD's deputy chief Izabella Koziell as saying.

Even if global warming is limited to the 1.5 to 2.0 degrees Celsius from pre-industrial levels agreed to in the Paris climate treaty, the glaciers are expected to lose a third to a half of their volume by 2100, the peer-reviewed report said.

"It underscores the need for urgent climate action," Wester said. "Every small increment will have huge impacts and we really, really need to work on climate mitigation... that is our plea."

Wester said improving technologies and previously classified high-resolution satellite imagery meant predictions could be made with a good degree of accuracy.

According to the AFP, the world has warmed an average of nearly 1.2 C since the mid-1800s, unleashing a cascade of extreme weather, including more intense heatwaves, more severe droughts and storms made more ferocious by rising seas.

Hardest hit are the most vulnerable people and the world's poorest countries, which have done little to contribute to the fossil fuel emissions that drive up temperatures, the French news agency added.