Corresponding author: Knut Aagaard (email@example.com)
Atlantic layer core temperatures in the central Makarov Basin are little different from those nearer the supposed entry region in the southern Makarov Basin, possibly indicating either a more direct source to the central basin from over the Lomonosov Ridge, or a vigorous internal circulation in the Makarov Basin. The data show no Atlantic layer warm events in the Makarov Basin before 1991 that are as strong as the widely-reported event observed during the 1990s. We find a moderate correlation between the Chukchi borderland record and that from the southern Makarov Basin, indicating that some temperature fluctuations propagate through this region, and indeed we see evidence of the 1960s warm event reaching this area. Finally, there is evidence that some of the Atlantic layer temperature fluctuations in the Chukchi borderland propagate directly into the northern Canada Basin, leaving the southern Canada Basin and the region between the Alpha and Lomonosov ridges as the most isolated part of the Arctic Ocean.
We gratefully acknowledge financial support for this work from the National Science Foundation (NSF).
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