During a strong, wind-driven, coastal upwelling event in July, 1973, off Oregon, large variations occurred in the properties of inertial-internal waves and water masses. At the peak of the event, the semidiurnal internal tide, which had significant amplitude during the spin-up phase, disappeared almost completely at mid-shelf. During the relaxation phase, near-inertial motions and anomalously warm water appeared at mid-depth in the upwelling zone....
Wang, Dong-Ping, and Christopher N. Mooers. 1977. "Evidence for interior dissipation and mixing during a coastal upwelling event off Oregon." Journal of Marine Research 35, (4). https://elischolar.library.yale.edu/journal_of_marine_research/1415