[CINC] Pacific decadal oscillation increasing fog this year

[Marty Flam]

May gray, June gloom, No sky July, August angst.
La Niña, which brings cooler ocean temperatures along the equator in the Pacific, has only intensified this year's June Gloom, he said.
Adding to the colder ocean is something scientists call Pacific decadal oscillation, in which cool surface temperatures oscillate between the western and eastern ends of the Pacific Ocean every 20 to 30 years. Right now, we are in the cool, or negative, phase of the oscillation, and the eastern part of the Pacific above 20 degrees latitude is colder than normal.

http://www.vcstar.com/news/2012/jun/15/why-june-gloom-is-stronger-than-normal-this-year/