The Presidential Daily Brief


  1. greeland ice sheet

    Clouds Are Driving Ice Melt in Greenland

    There’s no silver lining. A new study says clouds over Greenland’s ice sheet are trapping heat and directly causing increased melting, flushing 56 billion extra tons of water into the ocean every year. The clouds cause the most damage after dark, when they prevent heat captured during the day from escaping into the atmosphere, which significantly lowers the refreeze rate. Researchers say the data could help scientists create clearer climate change forecasts — since the clouds aren’t likely to roll away anytime soon.

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