| 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 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 Nine's impact on the monsoon. |
| Select the correct answer using the code given below: |
A) Only 1
B) Only 2
C) Both 1 and 2
D) Neither1nor 2
Correct Answer: B
Solution :
Exp. [b] Statement 1 'The Indian Ocean Dipole (IOD) also known as the Indian Nino is an irregular oscillation of sea-surface temperatures in which the western Indian Ocean becomes alternately warmer and then colder than the eastern part of the Indian ocean. The Indian Ocean Dipole (IOD) is defined by the difference in sea surface temperature between two areas (or poles, hence a dipole) a western pole in the Arabian Sea (western Indian Ocean) and an eastern pole in the eastern Indian Ocean South of Indonesia. Statement 2 A positive IOD usually negates the effects of ENSO over Indian monsoons.
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