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Periodically, the flourishing fish populations commonly found
off the west coast of Peru South America are replaced
by the sight of dead fish littering the water and beaches.
Unusual weather conditions occur around the globe as
jet streams, storm tracks and monsoons are shifted.
Such disarray is caused by a warm current of water that
appears every three to seven years in the eastern Pacific Ocean called
El Niño. This module introduces
conditions are responsible for its
occurrence, plus the impact it has on the rest of the world.
The El Niño instructional module has been organized into the following
Last Update: 04/28/98
Introduces El Niño, when El Niño events have been recorded
and how it compares to La Niña.
Provides a brief insight into the most recent El Niño event.
Introduces upwelling, the thermocline and how they impact local sea
Non-El Niño Years
Typical oceanic and atmospheric conditions that exist
in the tropical Pacific when no El Niño is present..
El Niño Events
Conditions that lead to an El Niño event
and how El Niño influences upwelling processes, tropical rainfall
and local fish populations.
Sea Surface Temperatures
El Niño visualized through sea surface temperature
Impacts on Weather
The influence of El Niño on weather conditions worldwide.
Reduction in local fish populations, which
in turn affect local industry and market prices worldwide.
Detection and Prediction
Methods and resources
used by NOAA for detecting and predicting the presence
of El Niño.
Those who contributed to the development of this module.
The navigation menu (left) for this module is called "El Nino"
and the menu items are arranged in a recommended sequence, beginning with this
introduction. In addition, this entire web server is accessible in both
"graphics" and "text"-based modes, a feature controlled from the
blue "User Interface" menu (located beneath the black navigation menus).
More information about the user interface
options, the navigation system,
or WW2010 in general is accessible from
About This Server.