"Record Low: Frigid Winter Air Shrinking"

An analysis of 76 years of temperature data from about a mile above the ground reveals that the amount of cold air above the Northern Hemisphere this winter is near a record low, indicating the planet’s warming climate. The depleted cold-air supply has led to less vigorous blasts of Arctic air and more frequent and intense mild weather. This winter’s cold pool will finish as the second-smallest on record, continuing a trend of shrinking winter cold pools. The shrinking cold pool coincides with what is likely to be one of the warmest winters on record, with many locations in the United States experiencing record warmth. The dominance of upper-air warm extremes is consistent with heat records outpacing cold records, highlighting the impact of climate change.