El Nino Southern Oscillations


 
 
Concept Explanation
 

El Nino Southern Oscillations

EL Nino Southern Oscillations (ENSO): The difference in pressure over Tahiti (Pacific Ocean, 18°S/149°W) and Darwin in Northern Australia (Indian Ocean, 12°30’S/131°E) is computed to predict the intensity of the monsoons. If the pressure differences were negative, it would mean below average and late monsoons. The EL Nino phenomenon is a feature connected with the Southern Oscillation. In this, a warm ocean current flows past the Peruvian Coast, in place of the cold Peruvian current. It occurs at the interval of 2 to 5 years. The changes in pressure conditions are connected to the EL Nino. Hence, the phenomenon is referred to as ENSO (EL Nino Southern Oscillations).

EL Nino: This is a name given to the periodic development of a warm ocean current along the coast of Peru as a temporary replacement of the cold Peruvian current. ‘EL Nino’ is a Spanish word meaning ‘the child’ and refers to the baby Christ. As this current starts flowing during Christmas. The presence of the EL Nino leads to an increase in sea-surface temperatures and weakening of the trade winds in the region.

Sample Questions
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Question : 1

Which of the following statement (s) is/are correct about La Nina?

Right Option : D
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Question : 2

Which of the following is the cold event?

Right Option : B
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Question : 3

Which of the following is not affected by the Phenomena of El Nino?

Right Option : D
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