This equates to approximately +0.548C above the standard 1961-1990 average, used by the World Meteorological Organisation.
Significantly, April Arctic sea ice was close to the 1979-2012 average, and the highest in April for over 10 years, shown below
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Experts though reported that much of the ice cover was thin, indeed since the end of April ice extent has fallen sharply.
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The average global temperature for April on the UAH satellite measure jumped to +0.295C above the 30 year running mean.