Glaciers are melting around the world. Last decade, the loss of ice in the more populated regions, such as Europe, increased at ever-faster rates. This not only accelerates sea level rise, but is also endangers freshwater supplies. An international group of researchers combined data from all those glaciers, excluding Antarctica and Greenland. The study was recently published in Nature.

The melting ice from glaciers worldwide is leading to an increased loss of regional freshwater resources. And it is causing global sea levels to rise at ever-greater rates. Since the year 2000, glaciers have been losing 273 billion tons of ice annually, according to estimates by an international research community led by researchers of the University of Zurich.

Tiny algae darken the surface of glaciers and thus accelerate their melting. This is the case, for example, on the Greenland Ice Sheet, which plays an important role in our climate and is already melting increasingly fast due to global warming. A study by the Max Planck Institute for Marine Microbiology in Bremen, Germany, and the University of Aarhus, Denmark, now shows that the ice algae grow extremely efficiently, despite the fact that there are hardly any nutrients available to them on the ice.

Arctic glaciers are leaking significant amounts of methane, a potent greenhouse gas. Gacial melt rivers and groundwater springs are transporting large volumes of methane from beneath the ice to the atmosphere. This previously unrecognised process could contribute to Arctic climate feedbacks, accelerating global warming.