La Nina is suspected to have caused recent floods in Australia. How is La Nina different from El Nino ?
La Nina is suspected to have caused recent floods in Australia. How is La Nina different from El Nino ?
1. La Nina is characterized by unusually cold ocean temperature in equatorial Indian Ocean whereas El Nino is characterized by unusually warm ocean temperature in the equatorial Pacific Ocean.
2. El Nino has adverse effect on south-west monsoon of India, but La Nina has no effect on monsoon climate. Which of the statements given above is/are correct?
(a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2
2 Answers
(d) La Nina is a cold current flowing accross the west coast of South America. It is characterized by the low and high pressure prevailing in the Pacific Ocean. Low pressure there brings good moonsoon to Indian subcontinent.
(d) La Nina is a coupled ocean-atmosphere phenomenon that is the counterpart of El Nino as part of the broader El Nino-Southern Oscillation climate pattern. During a period of La Nina, the sea surface temperature across the equatorial Eastern Central Pacific Ocean will be lower than normal by 3–5 °C. In the United States. A La Nina, on the other hand, is often beneficial for the monsoon, especially in the latter half.