El Nino and La Nina

El nino may return in 2012
Warming sea surfaces in the tropical Pacific, in an image released July 5th, 2012. There's a greater than 50 percent chance that El Niño conditions will develop during the second half of 2012.
(Image credit: NOAA/National Weather Service)
1 2 3 4 5 6 7 8 9 Archives