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  1. Satellite image of bushfire smoke over eastern Australia.

    Smoke from massive Australian bushfires warmed the stratosphere

    Australian fires in 2019 and 2020 injected almost 1 million metric tons of smoke into the stratosphere, causing it to warm and likely contributing to a large and persistent ozone hole.

    • Air Quality,
    • Climate

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  2. Smog in Beijing

    COVID-19 lockdowns linked to pollution spikes in some cities

    Lockdowns last year in response to COVID-19 resulted in drastic cuts to emissions, especially from vehicle tailpipes, and yet some urban areas saw a paradoxical spike in ozone air pollution.

    • Air Quality

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  3. Derecho with shelf cloud

    Wyoming middle school student names new supercomputer “Derecho”

    A Wyoming middle school student has won a statewide competition to name one of the world’s fastest supercomputers.

    • Supercomputing

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  4. A solar flare on the surface of the Sun. Image: NASA

    New study ties solar variability to the onset of decadal La Nina events

    A new study shows a correlation between the end of solar cycles and a switch from El Nino to La Nina conditions in the Pacific Ocean, suggesting that solar variability can drive seasonal weather variability on Earth.

    • Sun + Space Weather

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  5. UCAR statement on the mass shooting in Boulder

    UCAR President Antonio Busalacchi's statement on the March 22 mass shooting in Boulder.

    • Organization

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