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Atmospheric Sciences and Global Change
  • Stephanie Waldhoff

    Stephanie Waldhoff Co-Authored Science Perspective on the Social Cost of Carbon

    Congratulations to Dr. Stephanie Waldhoff, who co-authored a Perspective article in the December 5 issue of Science. Waldhoff and colleagues wrote "Using and improving the social cost of carbon," advocating for a uniform, scientific process to review and update a key economic tool used in U.S. government regulatory impact analyses.

  • Dr. Ghassem Asrar

    Ghassem Asrar Named Co-Chair of Scientific Council

    Dr. Ghassem R. Asrar was named co-chair of the Steering Council for the Agricultural Model Intercomparison and Improvement Project (AgMIP). The Steering Council members represent more than a dozen countries and diverse science perspectives. Asrar, world-renowned for his experience in remote sensing and satellites, brings a fundamental understanding of the connections between human activities and Earth's land, oceans, ice, and atmosphere.

  • journal cover

    The Bright Side of Arctic Clouds

    For the first time, modeling research led by PNNL found that atmospheric particles can brighten cold clouds in the Arctic. Using simulations, they showed that low clouds over the Arctic may be brightened by deliberately injecting small particles known as aerosols. The concept, untested over the Arctic until now, is called marine cloud brightening, and it can also happen when ships send exhaust into the atmosphere.

  • Dr. Jian Lu

    Jian Lu Authored Chapter in Encyclopedia of Atmospheric Sciences

    A leading expert in atmospheric circulation, Dr. Jian Lu of Pacific Northwest National Laboratory is lead author of a chapter on the Hadley circulation for the second edition of the Encyclopedia of Atmospheric Sciences published by Elsevier. Lu is an atmospheric scientist working on Hadley cell dynamics, atmospheric circulation and global warming, and the dynamics of extreme weather and climate events.

  • precipitating cloud at the start of the Madden-Julian oscillation

    The Roots of Moisture: Initiating and Propagating the MJO

    Using high-resolution regional modeling and field data, researchers at PNNL and collaborators found that the frequency of a large atmospheric wave's shallow-to-deep convective cloud transitions is sensitive to moisture buildup in the mid-troposphere and a large-scale lifting in the atmosphere. Simultaneous forces—the lifting and a decline in large-scale drying—result in moisture buildup leading to the initiation of the Madden-Julian Oscillation (MJO).

How do human activities and natural systems interact to affect the Earth's climate? Ultimately, that is the question challenging scientists in PNNL’s Atmospheric Sciences & Global Change Division.

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Atmospheric Sciences & Global Change

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