Fig. 2: Salinity anomalies of the deep ocean show continual freshening, with no sign of a salinity rebound as observed in the Intermediate ocean.
From: Deep ocean cooling and freshening from Subpolar North Atlantic reaches Subtropics at 26.5°N
Salinity anomalies across longitudinal zones 1-3 along the 26.5°N hydrographic line in time for the Intermediate, Deep, Abyssal, and AABW (Antarctic Bottom Water) layers defined in neutral density (γn; kg m-3). Anomalies of each grid point are computed temporally relative to the time mean over a climatological period of 2001-2020. Negative salinity anomalies are denoted in blue shading, indicative of overall freshening. The positions of actual hydrographic observations are overlaid with the black points. Note, not all hydrographic observations are used for the temporal and spatial gridding scheme (refer to Methods).
