WASHINGTON (AP) Earths glaciers are melting much faster than scientists thought. A new study shows they are losing 369 billion tons of snow and ice each year, more than half of that in North America.

The most comprehensive measurement of glaciers worldwide found that thousands of inland masses of snow compressed into ice are shrinking 18 percent faster than an international panel of scientists calculated in 2013.

The worlds glaciers are shrinking five times faster now than they were in the 1960s. Their melt is accelerating due to global warming, and adding more water to already rising seas, the study found.

Over 30 years suddenly almost all regions started losing mass at the same time, said lead author Michael Zemp, director of the World Glacier Monitoring Service at the University of Zurich. Thats clearly climate change if you look at the global picture.