Water parcels ending within the cool water polygon (initial-position) traverse most of their path along a region of relatively intense upwelling of about 1–4 meters per day that is present through the water column from the bottom to 5 meters deep, in the 40 days leading to the observation of the cool satellite SST pool (Fig. \ref{256220}). The maxima in upward velocity along the representative horizontal trajectory coincide with the SST minima from satellite and HyCOM data (cf. Figs. \ref{581122}a, \ref{581122}c, and \ref{256220}).