All available navifacial data from 1956 to 1974 have been compiled to produce two charts per year of surface salinity between 150°E and 130°W and between 10°N and 25°S. On each chart, the following m ain features are observed: south of 10°S and east of 160°W the tropical salinity maximum extending westward south of the equator; and a salinity minimum from 5°S to 20°S and west of 170°W. The oscillations of the position and intensity of these features are not all seasonal....
Donguy, J. R., and C. Henin. 1976. "Anomalous navifacial salinities in the tropical Pacific Ocean." Journal of Marine Research 34, (3). https://elischolar.library.yale.edu/journal_of_marine_research/1364