The Pacific decadal curret oscillation (Warm to cool to warm to cool to . . .) and these oscillations in turn cause La Nina and El Nino.
La nina Actually, it's El Nino
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California Current
colder than average surface temperatures in the eastern pacific
La nina
During La Nina, cooler-than-average sea surface temperatures in the central and eastern equatorial Pacific Ocean lead to changes in atmospheric circulation patterns. This can result in increased rainfall in the western Pacific and parts of the Americas, leading to wetter-than-normal conditions in some regions (such as Australia and Southeast Asia) and drier conditions in others (such as the southwestern United States). La Nina can also enhance hurricane activity in the Atlantic Ocean.
La Nina decreases hurricanes in the Pacific and increases them in the Atlantic.
colder than average surface temperatures in the eastern pacific
la nina