The near-record water temperatures of 2015-16 has been followed by a modest, quiet appearance of La Niña.
Published Jan 6, 2017
Cooler than normal conditions prevail in the central and eastern Pacific, but the event is so far considered weak.
Published Dec 22, 2017
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
After changing regional weather patterns and taking a bite out of sea life, an unusually persistent patch of warm water in the northeastern Pacific has chilled out.
Published Feb 16, 2016
Ocean conditions are not likely to help drought-stressed regions this spring. However, some broader changes might be coming in the Pacific.
Published Mar 25, 2015
A trio of globes of sea surface height anomalies shows a deep pulse of warm water—a Kelvin wave—crossing the Pacific Ocean in February 2010. Kelvin waves strengthen and maintain El Niño episodes.
Published Mar 21, 2010
Past events suggest the phenomenon winds down after December and January. But will this year follow the pattern?
Published Jan 22, 2016
These images show that the central and eastern Pacific Ocean was unusually cold in December 2010, a tell-tale sign of La Niña. The associated rainfall map shows that La Niña was impacting weather in parts of the globe.
Published Dec 24, 2010
The warm surface water this summer was caused by an unusual and persistent weather pattern.
Published Sep 13, 2019
La Niña, the large area of cold water in the Pacific Ocean widely blamed for last summer's drought and often related to an increase in the number of hurricanes that make landfall, appears to be on its last legs.
Published May 10, 2000
With each passing month, 2015 looks more and more like 1997.
Published Oct 13, 2015
A layer of exceptionally warm surface water extended from Point Conception to the Baja California coast.
Published Aug 8, 2018
Weakening trade winds are allowing warm water to move east across the Pacific in a telltale pattern.
Published Aug 5, 2015
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
On land, the passage of a severe storm might be marked by fallen trees or swollen streams. In the ocean, a hurricane leaves a swath of cold water in its path. That trail of cold water marks the passage of Hurricane Bertha through the North Atlantic Ocean in this sea surface temperature image.
Published Jul 26, 2008
A strip of cold water hugging the equator in the eastern tropical Pacific Ocean in mid-June may foreshadow a transition from El Niño to La Niña conditions
Published Jun 24, 2010
