Change and variability in East antarctic sea ice seasonality, 1979/80-2009/10.

In contrast, an increasing trend in duration of 1–2 days per year is apparent in the near-coastal zone from∼45°E to 60°E, from∼70°E to 88°E, and to the north of the Shackleton Ice Shelf ( Figure 6C ).

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The broader trend towards later sea ice advance and earlier sea ice retreat in the outer pack is consistent with an observed trend for increased SSTs to the north of the ice edge from August to October, which would inhibit maximum winter ice edge extent and initiate early retreat (melt back).

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