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    GRACE satellites tagged posts

    NASA Satellites reveal Abrupt Drop in Global Freshwater Levels

    November 17, 2024, Categories  Astronomy/Space

    An angular statellite orbits high over the earth in an artists ipression of the GRACE mission. A radar and laser beams link the satellite to a companion satallite far in the distance.
    GRACE satellites measure gravity as they orbit the planet to reveal shifting levels of water on the Earth (artist’s concept).
    NASA/JPL-Caltech

    An international team of scientists using observations from NASA-German satellites found evidence that Earth’s total amount of freshwater dropped abruptly starting in May 2014 and has remained low ever since. Reporting in Surveys in Geophysics, the researchers suggested the shift could indicate Earth’s continents have entered a persistently drier phase.

    From 2015 through 2023, satellite measurements showed that the average amount of freshwater stored on land—that includes liquid surface water like lakes and rivers, plus water in aquifers underground—was 290 cubic miles (1,200 cubic km) lower than the average levels from 2002 through 2014, said...

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