Print Friendly, PDF & Email

While both El Niño and La Niña have similar origins in the tropical Pacific, their effects on global weather patterns can be quite different. Compare and contrast.

Topic: Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc., geographical features and their location-changes in critical geographical features (including water-bodies and ice-caps) and in flora and fauna and the effects of such changes.

2. While both El Niño and La Niña have similar origins in the tropical Pacific, their effects on global weather patterns can be quite different. Compare and contrast. (250 words)

Difficulty level: Easy

Reference: The Hindu , Insights on India 

Why the question:

India is experiencing a colder winter than normal. This is due to the north-south winter flow set up by the weather phenomenon known as La Niña.

Key Demand of the question:

To differentiate between El-Nino and La-Nina, write its impact on global weather.

Directive word: 

Compare and contrast – provide for a detailed comparison of the two types, their features that are similar as well as different. One must provide for detailed assessment of the two.

Structure of the answer:

Introduction: 

Begin the answer by writing about the cyclical phenomenon El Nino-Southern Oscillation (ENSO).

Body:

In the first part, bring out the difference between El-Nino and La-Nina on the basis of their occurrence, mechanism, frequency of occurrence, duration, conditions required to occur etc.

Next, in detail write about how the El-Nino and La-Nina impacts the global weather patterns and bring out its impact on India.

Conclusion:

Pass a judgement as to if better information via prediction model can lead to better mitigation of adverse effects.