El Nino: Frequency & effects - Indian and World Geography

Q.  Consider the following statements

1. El Ninos occur every three to five years but may come as frequently as every two years or as rarely as every seven years.
2. It is unusual warming of the tropical Pacific Ocean
3. On occurrence El Ninos of Off the east coast of southern Africa, drought conditions often occur.
4. Australian Bureau of Meteorology gave warning of El-nino occurring this year

Which of the above statements are correct?
- Published on 30 Apr 15

a. 1,3,4
b. 1,2,3
c. 1,4
d. All

ANSWER: All

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