Moored observations of current and temperature at 15 sites on the Continental Rise south of Cape Cod are analyzed using the method of "empirical orthogonal functions." The first mode accounts for a majority of the observed variance for motions with periods ranging from 8.3 to 108 days....
Hogg, Nelson. 1981. "Topographic waves along 70°W on the Continental Rise." Journal of Marine Research 39, (4). https://elischolar.library.yale.edu/journal_of_marine_research/1563