1. Map showing projected drought risk for Africa and Europe, 2090-2099

    Climate change: Drought may threaten much of globe within decades

    The threat of drought is expected to increase throughout the century, potentially affecting many heavily populated regions.

    • Climate

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  2. Population trends: Another influence on climate change

    Changes in population growth and composition, including aging and urbanization, could significantly affect global emissions of carbon dioxide says a new study in PNAS.

    • Climate

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  3. El Niño and La Niña: More than mirror images

    El Niño and La Niña are counterparts in the El Niño-Southern Oscillation (ENSO), a cyclic warming and cooling of the eastern and central Pacific Ocean that exerts a major influence on global weather patterns, but they are not mirror images.

    • Climate

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  4. Two satellite views of Atlanta that show urban heat island effect.

    Capturing heat islands in climate models

    A team of scientists led by NCAR’s Keith Oleson has incorporated urban areas into a global climate model. The development is important because most models used for predicting future climate change do not account for the urban “heat island” effect.

    • Climate

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  5. Ice in the Chukchi Sea

    Arctic sea ice: The Great Recession continues

    Just as the U.S. economy began a dramatic nosedive in 2007, so did the Arctic’s summertime sea ice. In the summer of 2010, the ice—much like the economy—continued to struggle.

    • Climate

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