Trends in summer total ice (all ice types) (left) and multi-year ice (MYI, right) area from 1968 to 2016. Summer is defined as June 25 to October 15 for the Beaufort Sea, CAA, and Baffin Bay regions, and from June 18 to November 19 for Hudson Bay, Hudson Strait, Davis Strait, and Labrador Sea, consistent with Tivy et al. (2011a) and Derksen et al. (2012). Only trends significant at the 5% level (there is only a 5% possibility that the trend is due to chance) are shown.
Canadian Ice Service Digital Archive; Mudryk et al. (2018)