Which of the following climatic factors is primarily responsible for the sudden onset of the Southwest Monsoon (Edavappathy) over the coast of Kerala around early June?

💡 Solution & Explanation

The sudden onset of the Southwest Monsoon over Kerala is driven by the intense continental low-pressure trough that develops across northwest India during summer, creating a powerful pressure gradient that draws the moisture-laden Arabian Sea branch northward. The reversal of trade winds is a broader seasonal phenomenon, and the Tibetan Plateau acts as a high-level heat source rather than a cooling mechanism during the peak summer months. This localized thermal contrast is critical for setting off the monsoon rains along the western coast.