A new type of El Nino called El Nino Modoki appeared in the news. In this context, consider the following state- ments:
1. Normal El Nino forms in the Central Pacific ocean whereas El Nino Modoki forms in Eastern Pacific ocean.
2. Normal El Nino results in dimi- nished hurricanes in the Atlantic ocean but El Nino Modoki results in a greater number of hurricanes with greater frequency.
Which of the statements given above is/are correct?
Correct Answer: Option B
Explanation
1. El Nino Modoki (meaning 'similar, but different' in Japanese) is also known as Central Pacific El Nino. It involves anomalous warming in the Central Pacific ocean, while the Eastern Pacific and Western Pacific experience relatively cooler sea surface temperatures. Normal El Nino involves warming concentrated in the Eastern Pacific ocean. Therefore, Statement 1, which claims Normal El Nino is in the Central Pacific and El Nino Modoki is in the Eastern Pacific, is incorrect.
2. Normal El Nino events typically increase vertical wind shear over the Atlantic Ocean, which tends to suppress hurricane development, leading to diminished hurricanes.
3. El Nino Modoki events have different atmospheric teleconnection patterns. Studies suggest that El Nino Modoki can lead to conditions more favourable for Atlantic hurricane formation compared to normal El Nino, potentially resulting in a greater number of hurricanes with greater frequency. Therefore, Statement 2 is correct.
4. As only statement 2 is correct, option (B) is the answer.
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