Temperatures (left column) and densities (right column) versus the velocities of HSS plasma parcels for three subsets. First row: plasma parcels that have the peak velocities of HSSs. Here, we considered all HSSs with longitudinal widths of 0–40° at latitudinal displacements of the slice of 0°, 3°, 6°, 9°, and 12° to the center of the HSS. Second row: HSS plasma parcels originating from an HSS with a longitudinal width of 22°, for latitudinal displacements of 0–11° (labeled on top of the lines). Third row: all HSS plasma parcels derived from all HSSs with longitudinal widths of 0–40° at latitudinal displacements of 0–12°.