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Atmospheric Sciences and Global Change
  • Blue Ridge Mountain haze is isoprene

    How Trees Change the Atmosphere

    Isoprene rises into the atmosphere from trees, helping form a blue haze over the Blue Ridge Mountains. In conditions similar to very remote forests, PNNL researchers found that isoprene was a factor of 2 or more efficient at producing tiny atmospheric-important particles than previously believed. They proposed a mechanism to explain these reactions that will expand knowledge about this process in pre-industrial and current remote regions.

  • shelf cloud looms over Kansas, ready to dump rain on the Plain

    Getting at the Root of Rain

    Researchers at PNNL studied the last 35 years of weather and showed that large intense storms are now more frequent and long-lasting, even as lighter rain storms have decreased. The source, they found, is changing climate in the Southern Great Plains states in contrast with the proximity of the ocean that produces winds carrying moisture from the Gulf of Mexico to the Great Plains.

  • Dr. Balwinder Singh

    Singh Received DOE Commendation

    Balwinder Singh was honored with an Outstanding Contribution Award from the U.S. Department of Energy's Accelerated Climate Modeling for Energy (ACME) project during their bi-annual science team meeting. The award noted Singh's "critical role and sustained effort as an integrator for the Atmosphere Group"

  • Bay of Bengal tropical cyclone

    Cyclone Identity Crisis in the Bay of Bengal

    Researchers at PNNL and NOAA discovered that changes in tropical cyclone intensification rates have increased in the northern part of India's Bay of Bengal and decreased in the southern part caused by decades-long changes in the El Niño Southern Oscillation. Understanding the factors that affect the Bay's tropical cyclone activity will provide clues to how it will respond to global warming in the future.

  • Dr. Phil Rasch

    NOAA Appoints Phil Rasch to Modeling Working Group

    Phil Rasch at Pacific Northwest National Laboratory was appointed to NOAA's Unified Modeling Systems Architecture Working Group to help evolve the Environmental Modeling System at NOAA. A Laboratory and AAAS Fellow, he leads research teams that advance insight on modeling the climate and is internationally known for his expertise in general circulation, atmospheric chemistry and climate modeling.

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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