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winter

  • NOAA February temp anomaly

    Wild-Winter Whodunnit—Climate Change Over the U.S. With a Slow Jet Stream?

    This map produced by NOAA shows the land-surface temperature anomaly: how the temperature deviated from normal, on average, over the month. The darkest red areas were 12 degrees Celsius (22 degrees Fahrenheit) above average, while the darkest blue areas were 12 degrees Celsius below average.NOAA A question hangs like a cloud over the deeply weird […]

  • tree frost ring

    The Mystery of the Missing Frost

    On some clear winter mornings, we are treated to one of the highlights of the season: a thin layer of white frost delicately coating surfaces like individual grass blades. But even when a veneer of ice crystals encrusts much of the outdoor landscape, you may notice it missing from certain sites—the grass beneath a pine […]