In News: The La Nina conditions prevailing over the equatorial Pacific Ocean since September 2020 has entered the third year. There are only six instances of La Nina lasting for more than two years since 1950s.

What is La Nina and El Nino?

They are two natural climate phenomena occurring across the tropical Pacific Ocean and influence the weather conditions all over the world.

Normal Conditions:

EL Nino:

Impacts:

How El Nino impacts monsoon rainfall in across the globe:

How El Nino impacts monsoon rainfall in India:

La Nina:

Impacts:

What will be the Impacts of Third Consecutive La Nina?

Impacts on India:

Negative Impact on Agriculture:

Source: Indian Express

Previous Year Question

Q.1) With reference to ‘Indian Ocean Dipole (IOD)’ sometimes mentioned in the news while forecasting Indian monsoon, which of the following statements is/are correct (2017)

  1. IOD phenomenon is characterised by a difference in sea surface temperature between tropical Western Indian Ocean and tropical Eastern Pacific Ocean.
  2. An IOD phenomenon can influence an El Nino’s impact on the monsoon.

Select the correct answer using the code given below:

  1. 1 only
  2. 2 only
  3. Both 1 and 2
  4. Neither 1 nor 2

 

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