March 5, 2010

Almost two months after a devastating earthquake rocked Haiti, nearly half a million people there are displaced from their homes, and a million more are living without proper shelter. What climate-related risks will they face in the coming months?

February 10, 2010

NOAA researchers have built a "time machine" for weather that provides detailed snapshots of the global atmosphere from 1891 to 2008. The system's ability to "hindcast" past weather events is emerging as a powerful new tool for detecting and quantifying climate change.

October 23, 2009

For years, people have been pointing to El Niño as the culprit behind floods, droughts, famines, economic failures, and record-breaking global heat. Can a single climate phenomenon really cause all these events? Is the world just a step away from disaster when El Niño conditions develop?

August 30, 2009

The Southern Oscillation Index tracks differences in air pressure between the eastern and western sides of the tropical Pacific.

August 30, 2009

The Oceanic Nino Index tracks the sea surface temperature in the east-central tropical Pacific Ocean. It is NOAA's primary indicator of the climate patterns known as El Niño and La Niña. 

July 13, 2016

Blogger Tony Barnston describes how the transition from ENSO-neutral toward La Niña is progressing, and explains why models have become somewhat less bullish on the certainty and strength of the La Niña.

June 23, 2016

Crack out the popcorn, sit back, and marvel over the decay of El Niño.

image of a diver placing a CTD sensor on a reef
May 27, 2016

It's been a tough year for the globe's coral and the scientists who use coral to paint a picture of ENSO back thousands of years. 

April 28, 2016

Guest blogger Amy Butler explains how changes in the stratospheric polar vortex can influence the "usual" effects of El Niño on the climate in the Northern Hemisphere.

March 24, 2016

The 2015-2016 El Niño will go down as one of the strongest on record, and also, thanks to El Niño Rapid Response Campaign, one of the best observed.

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