1. Extent of snow cover on 14 January

    Putting the U.S. cold snap in context

    Even if the onslaught paled next to great winter outbreaks of the past, it was impressively persistent across some influential areas, including southeast England and the U.S. mid-Atlantic.

    • Climate

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  2. Brian O'Neill

    Climate conditions in 2050 crucial to avoid harmful impacts in 2100

    Policymakers should focus on what needs to be achieved in the next 40 years in order to keep long-term options viable for avoiding dangerous levels of warming, a new study concludes.

    • Climate

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  3. climate patterns

    Bering Strait influenced ice age climate patterns worldwide

    In a vivid example of how a small geographic feature can have far-reaching impacts on climate, new research shows that water levels in the Bering Strait helped drive global climate patterns during ice age episodes dating back more than 100,000 years.

    • Climate

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  4. AO index for September 2009-January 2010

    Brrr: The AO is way low

    No matter how you slice it, the last few weeks have been consistently wintry across large chunks of North America and Eurasia.

    • Climate,
    • Weather

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  5. UCAR Magazine

    Hard numbers: A crowded house, a distant target

    Sometimes the numbers just don’t add up, even when you know they need to. Attendees at the Copenhagen meeting got a taste of that as the massive meeting struggled to accommodate its guests.

    • Climate

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