A rapidly retreating Arctic perennial ice

•The perennial sea ice cover has been retreating at the rate of -9 %/decade •There is a 90% level  of confidence that the trend is between -5% and -12%. •The summer ice surface temperature has also been on the rise at 1.2 K/decade. •Ref:  Comiso, J., A rapidly declining sea ice cover, Geophys. Res. Let., 29(20), 1956, 2002.