Regionally averaged seasonal cycles and monthly trends. a) Decadal-average changes in the seasonal cycle averaged spatially over three geographic regions of the shelf study area, the mid-Atlantic Bight (MAB), the Gulf of Maine (GOM), and the Scotian Shelf (SS) (note the change in temperature scale between the MAB and the northern regions). b) The seasonal dependence of 33-year SST trends (°C decade^–1) from Figure 3, averaged spatially over the same three geographic regions. DOI: https://doi.org/10.1525/elementa.240.f4