joc3907-sup-0001-TableS1.docWord document36KTable S1. Pivot table of anomaly circulation pattern (ACP) frequencies by raw circulation pattern (RCP) frequencies (%).
joc3907-sup-0002-TableS2.docWord document41KTable S2. Mean melt season frequencies of the seven raw circulation patterns (RCP) by different period divisions. OR references Ogi and Rigor (2013) who noted a near-surface circulation shift about the year 1996. Recent refers to the period of six lowest Arctic sea ice summers since 1979. Net changes exceeding 1 week are bolded.

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