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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changes in the intensity and distribution of rainfall in the Tropics
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changes in the patterns of sea level pressure
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atmospheric circulation that affect many areas worldwide.
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cold oceanic patterns that occur near the Equator
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Detailed explanation-1: -During a La Niña period, the sea surface temperature across the eastern equatorial part of the central Pacific Ocean will be lower than normal by 3–5 °C (5.4–9 °F). An appearance of La Niña often persists for longer than five months. El Niño and La Niña can be indicators of weather changes across the globe.
Detailed explanation-2: -For example, in the Southern United States, during the fall through spring, El Niño usually causes increased rainfall and sometimes destructive flooding. La Niña, however, usually causes drier weather in the South, but the Northwest tends to be colder and wetter than average.
Detailed explanation-3: -La Niña causes the jet stream to move northward and to weaken over the eastern Pacific. During La Niña winters, the South sees warmer and drier conditions than usual. The North and Canada tend to be wetter and colder. During La Niña, waters off the Pacific coast are colder and contain more nutrients than usual.
Detailed explanation-4: -La Niña is a climate pattern that describes the cooling of surface-ocean waters along the tropical west coast of South America. La Niña is considered to be the counterpart to El Niño, which is characterized by unusually warm ocean temperatures in the equatorial region of the Pacific Ocean.