Fig. 6

Seasonal variability across the NWP coastal system in the depth of salinity values in the range [32.9–33.2], used as a proxy for freshwater vs. ocean influence. Maps correspond to mean values for 1993–2021. Darker areas indicate stronger freshwater influence (i.e., thicker low-salinity surface layer). The lighter shade corresponds to areas where salinity values were higher than 33.2 (source: GLORYS12V1).