Hydrographic data at Ocean Station Echo (35N, 48W) form an almost continuous 6-year series ending in 1973. The temperature fluctu ations at periods longer than about 8 months appear to be largely from the first vertical mode, and at periods of about 7 to 4 months from the second. These fluctuations are found to be coherent with those seen in the Panulirus data, at Bermuda, if the travel time for group velocity is included....
Sturges, W., and Alan Summy. 1982. "Low-frequency temperature fluctuations between Ocean Station Echo and Bermuda." Journal of Marine Research 40, (S). https://elischolar.library.yale.edu/journal_of_marine_research/1664