Q. With reference to Atlantic Niño, consider the statements below:
1. It causes a reduction in the number of low-pressure systems leading to a deficit-monsoon.
2. The biggest rainfall deficits from the Atlantic Niño tend to occur over the Eastern Ghats.
Which of the statements given above is/are correct?
- Statement 1 is correct: Atlantic Niño’s impact on the monsoon has been known since 2014 when a study led by INCOIS showed that the number of low-pressure systems is greatly reduced by the Atlantic Niño, leading to deficit monsoons.
- Statement 2 is incorrect: The Atlantic Niño affects the monsoon by producing atmospheric waves, which propagate into the Indian Ocean. These waves affect air temperatures over the Indian Ocean and influence the land-ocean thermal contrast as well as Low Pressure Systems (LPSs). The biggest rainfall deficits from the Atlantic Niño tend to occur over the Western Ghats and the core monsoon zone.