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Understanding El Niño and La Niña Phenomena for Disaster Preparedness

Learn about the normal conditions of upwelling off the coast of Peru and warm water patterns in the Western Pacific, as well as the impacts of El Niño and La Niña events. Discover how these phenomena affect surface currents, ocean temperatures, and global weather patterns. This knowledge is essential for disaster planning and prevention measures.

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Understanding El Niño and La Niña Phenomena for Disaster Preparedness

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  1. Understanding El Niño and La Niña

  2. Normal conditions: upwelling off the coast of Peru, warm water “piled up” in the Western Pacific

  3. Strong upwelling

  4. Normal conditions: upwelling off the coast of Peru, warm water “piled up” in the Western Pacific

  5. Normal conditions

  6. El Niño conditions: surface current reversed, pushing warm water toward the Eastern Pacific Upwelling repressed  Unusually warm water across Equatorial Pacific

  7. El Niño conditions: surface current reversed, pushing warm water toward the Eastern Pacific Upwelling repressed  Unusually warm water across Equatorial Pacific

  8. La Niña: Stronger trade Winds than normal, causing a strong upwelling of cold water in the Eastern Pacific

  9. Developing La Niña after an El Niño

  10. Declared El Niño related disasters, 1998

  11. General: http://earthguide.ucsd.edu/virtualmuseum/climatechange1/11_1.shtml Health effects :https://apps.who.int/inf-fs/en/fact192.html Fisheries disruptions,,Seabirds, marine mammals: http://www.elnino.noaa.gov/impacts.html

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