Question
Regions receiving winter rainfall in north-west and southern India have different reasons. Explain.
Solution
Winter rainfall in north-west India : Northwest India receives winter rainfall from low pressure systems, called the western disturbances or depressions. These depressions originate from Mediterranean sea and Persian Gulf. They travel eastward across Iran and Pakistan and reach India during the winter season. They are generally active between December and February. They cause much rainfall over plain areas of northwest region of India. The rainfall caused by western disturbances decreases from north and northwest towards east.
Southern India : The Tamil Nadu coast in Southern India receives rainfall during October and November. It is caused by the North-east monsoons. During this season, several cyclonic storms develop in the Bay of Bengal which move from the north-east to south-west causing substantial rainfall on the coast of Tamil Nadu.
