Four Days in Nunavut
Previous posts described how the Northwest Passage was treacherously laden with ice this year. The image above shows the flash freezing in this region over the last four days. Sept. 19 the CAA ice extent (Canadian Arctic Archipelago) was 320k km2, close to its annual minimum. Yesterday MASIE showed 450k km2, a 40% increase.
The graph shows MASIE reporting ice extents totalling 4.74M km2 yesterday, 124k km2 above the 11 year average (2007 to 2017 inclusive). NOAA’s Sea Ice Index is 119 k km2 lower, 2007 was 462k km2 lower, and 2012 1.2M km2 less ice extent. A dip on day 252 to 4.43M km2 will certainly be the daily minimum for the year. With typical refreezing to month end, we can expect the September monthly average will exceed 2007 by at least 300k to 400k km2.