Compléter Unit 1: Arctic Sea IceVersion en ligne Arctic Sea Ice Review from Unit 1 from Climate Change par Mr. Mundo 1 minimum sensors 15% Arctic sea ice reaches its extent each September , defined as the area where satellite detect at least ice coverage per pixel . 2 shrinking decade average Since 1979 , September Arctic sea ice has been at an alarming rate of 12 . 2% per compared to the 1981 ? 2010 extent . 3 2012 lowest satellite The year holds the record for the sea ice extent observed in the record .