Question
With reference to ‘Indian Ocean Dipole (IO(d)'. sometimes mentioned in the news while forecasting Indian monsoon, which of the following statements is/are correct?
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:
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Answer:
B
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Explanation:
Statement 1 is incorrect. The Indian Ocean Dipole (IOD) phenomenon is characterized by a difference in sea surface temperature between the tropical Western Indian Ocean (near the African coast) and the tropical Eastern Indian Ocean (near Indonesia). It does not involve the tropical Eastern Pacific Ocean.
Statement 2 is correct. An IOD phenomenon can influence the impact of El Niño on the Indian monsoon. The interaction between the IOD and El Niño can modify the impact of El Niño on the Indian monsoon, leading to variations in monsoon rainfall.