The extent of sea ice in Antarctica has shrunk compared with the long-term average for this time of year between 1981 and 2010 by an area four times the size of Texas.
Antarctic sea ice levels reached record-breaking lows last week — and this"extraordinary behavior" could mark the start of its long-term decline, scientists warn.
Because seasons are flipped in Antarctica relative to the Northern Hemisphere, it is currently winter in Antarctica — and sea ice should be growing fast. While sea ice is accumulating around the continent, this is not happening at the same rate and to the same extent as in previous years."In the midst of its winter growth phase, Antarctic sea ice has reached a record smashing-low extent for this time of year," NOAA staff wrote on Twitter.
Antarctic sea ice extent exhibits more variation year-to-year than Arctic sea ice due to geographic differences between the two regions. But even so, the current record-low is unusual, NOAA representatives said in a statement.
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