"Oscillation patterns" refers to regular, repetitive movements or fluctuations that occur in a particular way. It describes the back and forth or up and down motions that follow a predictable and repeating pattern. Full definition
A study looking at how climate change will affect this ocean oscillation pattern has predicted that if the world is allowed to warm uncontrollably, these kinds of extreme events will become the norm by 2050. (newscientist.com)
This correlates well with the cycles of El Niño Southern Oscillation pattern and measured changes in the amount of the energy from the sun. (sciencedaily.com)
El Niño Southern Oscillation (ENSO)- neutral conditions in the eastern central Pacific Ocean and a negative Pacific decadal oscillation pattern in the North Pacific. (dotearth.blogs.nytimes.com)