World Humanitarian Summit Series

  • As glacial lakes flood, the effect can be devastating
    Oct 13, 2015

    In this blog series, UNDP experts and practitioners share their perspective on issues of climate change, in the lead up to COP21 climate conference in December. Golf, yes. But GLOF? What is that? The increasingly apparent impacts of climate change have introduced this new term—an abbreviation for “glacial lake outburst flood”—to the world’s vocabulary. When glaciers melt, they sometimes form lakes on mountaintops. The water in these glacial lakes accumulates behind loose “dams” made of ice, sand, pebbles and ice residue. But these dams are inherently unstable and avalanches, falling boulders, earthquakes, or even simply the accumulation of too much water can unleash sudden, potentially disastrous floods in nearby communities.

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