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Arctic sea ice typically reaches its summer minimum extent in September, and its winter maximum extent in early March. According to the National Snow and Ice Data Center (NSIDC), Arctic sea ice extent reached 14.54 million square kilometers (5.61 million square miles) on February 25, and then began to decline, signaling that the spring thaw was underway. Unless a late growth spurt takes place, it will be the smallest maximum extent in the satellite record. [Source: NOAA Climate.gov]
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