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The 1997 El Nino/Southern Oscillation (ENSO 97-98)

Read current reports on events associated with ENSO 1997 at The 1997 El Nino/Southern Oscillation (ENSO 97-98), provided by the Interdisciplinary Minor in Global Sustainability program at the University of California, Irvine. Reports are contributed by readers, and concentrate on El Nino's effects on seabirds and marine ecosystems, but other topics are welcomed and included.

According to the National Oceanic and Atmospheric Adminstration (NOAA), El Nino is "a disruption of the ocean-atmosphere system in the tropical Pacific having important consequences for weather around the globe." It is caused by a change in trade wind patterns in the central and western Pacific ocean, and causes a large volume of ocean to be warmed (typically about 20 degrees of latitude by 90 degrees of longitude). It happens at irregular intervals and has global climatic consequences (regional flooding and droughts, in particular).

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The 1997 El Nino / Southern Oscillation (ENSO 97-98)
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