Temperature of the Weddell Deep Water west of the Greenwich Meridian in 1977 is dramatically lower than that observed in the same region in 1973. The most intense thermal alteration extends from approximately 200 m to 2700 m. Cooling, which averages 0.2°C, accompanies a nearly density compensating salinity decrease, averaging 0.02‰....
Gordon, Arnold L.. 1982. "Weddell Deep Water variability." Journal of Marine Research 40, (S). https://elischolar.library.yale.edu/journal_of_marine_research/1640