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. The 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:

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. The IOD phenomenon is — UPSC Prelims 2017 Answer & Explanation

Geography2017

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

The IOD phenomenon is characterised by a difference
An IOD phenomenon can influence an El Nino’s impact

on the monsoon. Select the correct answer using the code given below:

Explanation

The correct option is 2 only. The Indian Ocean Dipole (IOD) is characterized by a difference in sea surface temperatures between the tropical Western and Eastern Indian Ocean, not the Eastern Pacific Ocean. The IOD plays a crucial role in influencing monsoon patterns in India, particularly by modulating the impact of El Niño events; for instance, a positive IOD can help mitigate the adverse effects of an El Niño on Indian monsoon rainfall, leading to improved precipitation levels. This interaction is critical for understanding climate variability and its implications for agriculture and water resources in India, which is pertinent for UPSC Prelims.

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