What is La Nia?
La Nia refers to the periodic cooling of ocean surface temperatures in the central and east-central equatorial Pacific that occurs every 3 to 5 years or so. La Nia represents the cool phase of the El Nio/Southern Oscillation (ENSO) cycle, and is sometimes referred to as a Pacific cold episode. La Nia originally referred to an annual cooling of ocean waters off the west coast of Peru and Ecuador. Show me strong La Nia sea-surface temperature and tropical rainfall patterns. Show me the past El Nio and La Nia events by season.
