Keywords: Arctic Sea Ice Extent, March & September, 1979-2007.png en Time series of the difference in ice extent in March the month of ice-extent maximum and September the month of ice-extent minimum from the mean values for the time period 1979-2007 Based on a least squares linear regression the rate of decrease for the March ice extents was 2 8 per decade and and September was 11 3 per decade http //www arctic noaa gov/reportcard/seaice html NOAA - J Richter-Menge S Nghiem D Perovich I Rigor 2007-10 PD-USGov Linear regression Original upload log wikitable - - 2008-06-06 06 23 43 790 × 429 16117 bytes Sagredo <nowiki> en Time series of the difference in ice extent in March the month of ice-extent maximum and September the month of ice-extent minimum from the mean values for the time period 1979-2007 Based on a least squares linear re</nowiki> |