1. UCAR statement on U.S. withdrawal from Paris climate agreement

    With new uncertainties about greenhouse gas emissions, research is more vital than ever.

    • Climate

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  2. Map of ocean oxygen trend

    Decades of data on world's oceans reveal a troubling oxygen decline

    A new analysis has found that the amount of dissolved oxygen contained in the water – an important measure of ocean health – has been declining for more than 20 years.

    • Climate

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  3. The headwaters of the Rio Grande River

    Warmer temperatures cause decline in key runoff measure

    Since the mid-1980s, the percentage of precipitation that becomes streamflow in the Upper Rio Grande watershed has fallen more steeply than at any point in at least 445 years.

    • Climate,
    • Weather

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  4. Constructing roads for climate: flooded road in Texas

    Building roads to match tomorrow's weather

    When engineers design roads, bridges, and other types of transportation infrastructure, they need to account for changing weather patterns.

    • Climate

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  5. Upper-atmospheric wave pattern linked to California droughts, floods: detail of wavenumber-5 pattern

    Scientists link recent California droughts and floods to distinctive atmospheric waves

    The crippling wintertime droughts that struck California from 2013 to 2015, as well as this year's unusually wet California winter, appear to be associated with the same phenomenon: a distinctive wave pattern that emerges in the upper atmosphere and circles the globe.

    • Climate,
    • Weather

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