GyanGramWith reference to ‘Indian Ocean Dipole (IOD)’ sometimes mentioned in the news while forecasting Indian monsoo…
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With reference to ‘Indian Ocean Dipole (IOD)’ sometimes mentioned in the news while forecasting Indian monsoon, which of the following statements is/are correct?
1. IOD phenomenon is characterized by a difference in sea surface temperature between tropical Western Indian Ocean and tropical Eastern Pacific Ocean.
2. An IOD phenomenon can influence El Nino’s impact on the monsoon.
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• Correct Answer: B
• IOD is defined by SST differential between western and eastern tropical Indian Ocean, not Pacific Ocean.
• A positive IOD can counter El Nino's negative monsoon impact, improving rainfall.
• Statement 1 conflates IOD with ENSO mechanism.
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