CLIMATE OF INDIA
EL NINO AND SOUTHERN OSCILLATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2-5 years
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2-7 years
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7-10 years
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10-20 years
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Detailed explanation-1: -sea interactions collectively referred to as the El Niño/Southern Oscillation (ENSO). They occur every two to seven years and typically last for 9 to 12 months, and have widespread impacts on weather around the world.
Detailed explanation-2: -El Niño and La Niña are opposite phases of a natural climate pattern across the tropical Pacific Ocean that swings back and forth every 3-7 years on average. Together, they are called ENSO (pronounced “en-so”), which is short for El Niño-Southern Oscillation.
Detailed explanation-3: -El Niño events occur irregularly at two-to seven-year intervals. However, El Niño is not a regular cycle, or predictable in the sense that ocean tides are. El Niño was recognized by fishers off the coast of Peru as the appearance of unusually warm water.
Detailed explanation-4: -While an El Niño event occurs every three years on average, strong El Niño events typically occur every 6-10 years. The five strongest El Niño events since 1950 were in the winters of 1957-58, 1965-66, 1972-73, 1982-83 and 1997-98.