"Oceanic oscillations" refers to the natural movement and fluctuations of ocean waters, like waves or currents, which occur over specific periods of time. Full definition
Davis speculates these cycles are the result of oceanic oscillations which frequently operate on a centennial scale bases. (co2coalition.org)
In addition there is The Hot Water Bottle Effect whereby the oceans release stored heat intermittently at variable rates depending on the average state of the various oceanic oscillations at any particular time. (newclimatemodel.com)
I have my own theory on that point which I've expressed in my earlier articles so that it may be possible to use the more recently discovered decadal oceanic oscillations as a diagnostic tool but this article is about weather so I will leave the oceans to one side in this article. (newclimatemodel.com)