Mid June Arctic Ice Lopsided

Science Matters

In the first half of June 2019, the shift from ice to water is unusually lop-sided in two respects. The image above, supported by the table later on shows that in the last two weeks water has opened up faster on the Pacific side, and much slower on the Atlantic side, with the exception of Baffin Bay. The other surprise is that MASIE shows much less ice than does SII, a reversal of the typical situation.

The graph below shows the surprising discrepancy between MASIE and SII appearing in May and continuing in June.

Note that the NH ice extent 12 year average declined from 12.7M km2 to 10.9M km2 during in the last 30 days. MASIE 2019 shows about the same decline from 11.9M km2 to 10.3M km2. That track matched 2016 in May, but is now closest to 2010 and below other years. Interestingly SII showed a much…

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