(CNN) Most glaciers in Central Europe, Western Canada and the United States would vanish in the second half of this century under the current rates of ice loss, according to a new report.

Glaciers have lost over 9,000 billion tons of ice between 1961 and 2016, according to a research letter published in the journal Nature on Monday. This amounts to a block of ice the size of Germany and almost 100 feet thick, or the size of the United States and 4 feet thick, said lead author Michael Zemp.

"Under current loss rates we are going to lose glaciers -- basically all glaciers -- in several mountain ranges," said Zemp, who is a lecturer in glaciology at the University of Zurich.

This ice loss has also meant global sea levels increased by up to 27 millimeters over the time period, said the letter, which was authored by 15 international scientists. This accounts for between 25% to 30% of the observed increase in global sea levels.

In this latest research, the team used data from over 19,000 glaciers, including satellite observation and 450 field visits. That's far more than previous studies, which Zemp said relied on data from around 500 glaciers.

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