Sea ice in the Arctic a bit below the 1981-2010 average for this date but still within two standard deviations, with more ice than average off Canada — indicating we are still within expected natural variation, statistically speaking.
Remember that the National Snow and Ice Data Center (NSIDC) says this about standard deviation:
“Measurements that fall far outside of the two standard deviation range or consistently fall outside that range suggest that something unusual is occurring that can’t be explained by normal processes.”
Ice maps below, click to enlarge.
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