A patch of warmer than average ocean temperatures in the eastern Pacific on July 26, 2009, revealed the onset of El Niño conditions.
Published Jul 28, 2009
Cooler than normal conditions prevail in the central and eastern Pacific, but the event is so far considered weak.
Published Dec 22, 2017
Temperatures were well above the norm for the month, setting records and rising well above the long-term trends.
Published Apr 17, 2012
With each passing month, 2015 looks more and more like 1997.
Published Oct 13, 2015
This sea surface temperature anomaly causes strange summer weather around the world, such as drought in the Mid-Atlantic states, cool temperatures in California, and rain in Indonesia.
Published Jun 10, 1999
La Niña is an occurrence of unusually cold water temperatures in the Pacific Ocean along the equator (the precise area affected is outlined in black in the image above). La Niña and its opposite, El Niño, are linked to seesaw variations in air pressure over the tropical Pacific and affect weather patterns across the globe. NASA monitors developing El Ni&ntidle;o and La Niña events by observing sea surface temperatures. This image compares the water temperatures observed in late January 2006 to long-term average conditions for that time of year. The recent data were collected by the Advanced Microwave Scanning Radiometer for EOS (AMSR-E). Red shows where sea surface temperatures are warmer than normal and blue where they are colder than normal.
Published Feb 9, 2006
Temperature anomalies in the eastern Pacific Ocean are both influencing and being influenced by unusual weather patterns. The effects are rippling through the marine environment.
Published Apr 18, 2015
If you live in the northern hemisphere, the past few weeks have been strange. In places where it should be seasonably hot, it’s just warm. In places where weather is usually mild in the summer, it has been ridiculously hot.
Published Aug 8, 2014
After appearing for two consecutive winters, La Niña appears to be taking some time off.
Published May 4, 2012
As of early January 2007, the 2006-2007 Northern Hemisphere winter was proving to be a mild one in terms of temperatures.
Published Jan 10, 2007
These color-coded images show the strengthening of El Niño between October and November 2009. In the November image, warm waters (indicated in red) have spread across the Pacific.
Published Dec 11, 2009
