Given the context of this highly anomalous and extremely persistent atmospheric ridging over the northeastern Pacific Ocean, it's very interesting to note that there has also been a region of strongly
positive sea surface temperature anomalies in same the general vicinity for the past 10 - 11 months.
The best way to envision the relation between ENSO and precipitation over East Africa is to regard the Indian Ocean as a mirror of the Pacific
Ocean sea surface temperature anomalies [much like the Western Hemisphere Warm Pool creates such a SST mirror with the Atlantic Ocean too]: during a La Niña episode, waters in the eastern Pacific are relatively cool as strong trade winds blow the tropically Sun - warmed waters far towards the west.
«The data showed that both greenhouse gases and
sea surface temperature anomalies contributed strongly to the risk of snow drought in Oregon and Washington,» said Mote, a professor in OSU's College of Earth, Ocean, and Atmospheric Sciences.
«You can
find sea surface temperature anomalies online, you can look at the signs of the Pacific decadal oscillations and El Niño as well — the data aren't behind some sort of paywall, anyone can Google it,» she said.
Some processes arise through interactions with other parts of the climate system such as the ocean (for example as manifested
through sea surface temperature anomalies), sea ice anomalies, snow cover anomalies as well as through coupling to the circulation in the stratosphere.
This is in agreement with Pokrovsky who predicts below - normal ice cover in the Atlantic sector of the Arctic Ocean, based on observed warm
spring sea surface temperature anomalies in the northeast Atlantic Ocean.
Strong,
localized sea surface temperature anomalies may reveal that an ocean current, such as the Gulf Stream Current off the east coast of the United States, has veered off its usual path for a time or is stronger or weaker than usual.
Meehl, G. A., and A. Hu, 2006: Megadroughts in the Indian monsoon region and southwest North America and a mechanism for associated multi-decadal Pacific
sea surface temperature anomalies Journal of Climate, 19, 1605 — 1623.