Series of bathythermograms extending over 12- to 90-day periods from two deepsea stations in the northeastern Pacific fail to show more than indefinite or minor fluctuations of tidal period, in contrast with marked internal tides which have been observed in the Atlantic. Fluctuations of surface temperature were found to be about half random and half due to diurnal solar heating.
Rudnick, Philip, and John D. Cochrane. 1952. "Diaurnal fluctations in bathythermograms." Journal of Marine Research 10, (3). https://elischolar.library.yale.edu/journal_of_marine_research/752