Monthly sea surface temperature (SST) trends north of the sea ice zone (marked in grey) for the period 1982–2010.

A). Maps of SST trends for approximate months of annual sea ice advance (March–August). B). Maps of SST trends for approximate months of annual sea ice retreat (September–February). The x axis is degrees longitude, and the y axis degrees latitude. Hashed areas denote statistical significance at the 95% level. The black lines depict the location of the transects marked in Figure 7.