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El Niño Arrives: Expected to Persist Through Winter 2009-2010

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Image of sea surface temperatures along the equatorial Eastern Pacific, as of July 1. Click for larger image.

The Department of Commerce’s National Oceanic and Atmospheric Administration (NOAA) announced the arrival of El Niño, a climate phenomenon with a significant influence on global weather, ocean conditions and marine fisheries. El Niño, the periodic warming of central and eastern tropical Pacific waters, occurs on average every two to five years and typically lasts about 12 months. NOAA expects this El Niño to continue developing during the next several months, with further strengthening possible. The event is expected to last through winter 2009-2010. (More) (Animation)

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