Consider the teleconnection between the Indian Ocean Dipole (IOD) and the monsoon climate of Kerala: Statement I: A positive phase of the Indian Ocean Dipole is characterized by anomalous warming of the western tropical Indian Ocean and cooling of the eastern tropical Indian Ocean. Statement II: A positive IOD phase often counteracts the suppressing effects of El Nino on Indian monsoon rainfall, helping sustain normal precipitation patterns over Kerala. Which of the following is correct?

💡 Solution & Explanation

The Indian Ocean Dipole is a coupled ocean-atmosphere phenomenon in the equatorial Indian Ocean. A positive IOD features warmer western waters off the African coast and cooler eastern waters off Indonesia, creating an atmospheric circulation that enhances moisture transport toward the Indian subcontinent, frequently mitigating drought impacts induced by Pacific El Nino events. This teleconnection significantly modulates seasonal rainfall variability in southern states like Kerala. Climatologists monitor IOD indices alongside El Nino Southern Oscillation indicators for seasonal monsoon forecasting.