Warm temperatures of 2006 caused by greenhouse gases.
El Niño and La Niña are parts of an oscillation in the ocean-atmosphere system (called the El Niño Southern Oscillation, or ENSO cycle) that can impact weather and climate conditions across the globe. El Niño features warmer-than-average temperatures in the waters of the equatorial Pacific Ocean, while La Niña features colder-than-average waters. Read our stories below on the latest ENSO conditions and research into how the cycle affects global weather patterns.
Scientists created the longest-ever record of hurricane strikes and show El NiÃƒÂ±o acts like switch.
An informal straw poll of New Yorkers reveals that many think global warming and El Nino are somehow contributing to this year's unusually mild winter.
As warming ocean temperatures have been linked to a spike in wildfires in the past, scientists now predict the western United States could experience more of such fires in the coming decades.
El Nino conditions have developed in the tropical Pacific and are likely to continue into early 2007.
The U.S. should expect wetter-than-average conditions over portions of the Gulf Coast and southeastern states in the first three months of 2007
The jet streams are on the move, and scientists say it could change rainfall long-term patterns around the globe.