Between 24 July and 10 September 1964, low sea-surface salinity was present off South America between 5°N and 100°N in the form of two partly merged tongues extending more than 600 n. mi. east of 50°W. Near 9°N, 50°W, a marked eastward flow was found and identified as the Equatorial Counter Current; it apparently brought in much of the freshened water encountered east of 50°W....
Cochrane, John D.. 1969. "Low sea-surface salinity off northeastern South America in summer 1964." Journal of Marine Research 27, (3). https://elischolar.library.yale.edu/journal_of_marine_research/1163