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January-to-March was not only the hottest start to any year on record, it also beat “the previous record of 2002 by 0.09°F.”
March was so warm that only two other months ever had a higher “departure from average” (i.e. temperature above the norm), February 1998 and January 2007, and they only beat March by “just 0.01°C (0.02°F).”
Arctic sea ice hit its smallest March extent since records began in 1979.
Last week, NASA also reported this was the hottest three-month start of any year on record. In NASA’s database, though, this was the third warmest March on record. It was the warmest in the dataset of the Japan Meteorological Agency. These three agencies use slightly different methods for tracking global temperature, so their monthly and yearly rankings differ slightly, even as they all show the same long-term trend driven by carbon pollution.