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The world is getting warmer. It comes as no surprise, therefore, when researchers announce as they did this past September that Arctic sea ice extent is still below normal.
Arctic sea ice is reaching its annual "minimum" melt for the summer, but NASA says this year's low will unlikely be breaking any records and will not match 2012's record-breaking ice melt season.
CU-Boulder's Snow and Ice Data Center analysis shows negative summertime ice trend continues.
US scientists say global warming caused arctic sea ice to melt to its second-lowest level this year, rising slightly from 2007's record but still showing a downward trend.