March 9, 2015

Guest blogger Dennis Hartmann makes the case that warm waters in the western tropical Pacific—part of the North Pacific Mode climate pattern—are behind the weird U.S. winter weather of the past two seasons.

February 5, 2015

At the beginning of February, the atmosphere was looking a little bit like El Niño. Is this just another rolling stone?

January 22, 2015

The tropical Pacific Ocean sloshes around like water in your bathtub.  These waves are as important as the vortex of water that spirals down the drain.  

sea surface height anomaly from satellite data
November 6, 2014

What's behind the drop in probabilities this month? And why might forecasting this event be particularly tricky?

October 16, 2014

How El Niño is like different flavors of ice cream.  Seriously.

June 2009 SST anomalies
September 19, 2014

As of late August 2014, tropical atmospheric temperatures appear to be responding more strongly to the ocean than they typically do at this early stage of El Niño development.   

September 11, 2014

If you are someone who wants more or stronger ENSO events in the future, I have great news for you–research supports that. If you are someone who wants fewer or weaker ENSO events in the future, don’t worry–research supports that too.

August 1, 2014

How do changes in the equatorial Pacific Ocean impact places much farther away? The answer for the tropics, at least, lies in changes to the equator-wide atmospheric circulation called the Walker Circulation. 

June 2014 SST anomalies
July 25, 2014

Why hasn't El Niño been declared yet?  The answer might lie in the gradients of sea surface temperatures across the tropical Pacific Ocean.  

This video shows 15 years of data obtained via Polar-orbiting satellites that are able to detect subtle differences in ocean color, allowing scientists to see where there are higher concentrations of phytoplankton - a proxy for the concentration of chlorophyll in the ocean.

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