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Though cool temperatures prevailed across the eastern U.S. and Canada through March, the month was the fourth warmest March on record globally, the National Oceanic and Atmospheric Administration announced Tuesday. It was the 38th March in a row with warmer-than-average temperatures.
Where 2014 ultimately falls in the rankings may depend on whether an El Niño develops later this year, something NOAA scientists have said has a better than 50 percent chance of happening by this summer or fall. An El Niño event is marked by warmer-than-normal sea surface temperatures in the eastern tropical Pacific Ocean, and is accompanied by shifts in atmospheric wind patterns. El Niño years are typically warmer than normal globally.
The global average temperature wasn’t the only sign of warming in March. The maximum extent of Arctic sea ice, reached on March 21, was the fifth smallest on record, and snow cover across the Northern Hemisphere was the sixth smallest extent in the 48-year record.