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Unformatted text preview: http://www.pmel.noaa.gov/tao/elnino/impacts.html#part4 During El Nio the trade winds weaken and warm water moves back east in a slow wave. This leads to a reduction of the thermocline in the eastern Pacific and an increase of the thermocline in the western pacific. Coastal upwelling along South America is no longer able to tap into the cold, nutrient-rich water from beneath it, thus reducing the supply of chemical nutrients. As a result of this decrease in nutrients, there is a drastic decline in phytoplankton production, which in turn adversely affects all the creatures at higher levels of the marine food chain. This causes many of the fish that support life in the Peruvian area to disappear and thus effect that economy. http://www.csa.com/discoveryguides/archives/elnino.php...
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- Spring '08