The latter dominates to produce the warm surface mixed layer. (judithcurry.com)
This is consistent with stronger light limitation associated with a deeper summer surface mixed layer, perhaps related to the formation of Glacial North Atlantic Intermediate Water previously suggested to have occurred near the core site. (gfdl.noaa.gov)
This is seen in Figure 3 as just below the surface mixed layer temperature contours mostly followthe isolines of the force needed to mix the waters to the surface. (realclimate.org)