Question

What is the general distribution of rainfall during the period from July to September in India?

Answer 1

Hint: The southwest summer monsoon is Earth's most prolific rainy season, lasting four months and dominated by large convective thunderstorms. The monsoonal torrents provide about $80\% $ of India's yearly rainfall and are caused by southeast trade winds originating from a high-pressure mass centred over the southern Indian Ocean.

Complete answer:
The monsoon season, also known as the rainy season, lasts from June through September. The humid southwest summer monsoon, which begins to wash throughout the country in late May or early June, dominates the season. At the beginning of October, the monsoon rains in North India begin to fade. South India gets more rain than the rest of the country.

The mass is drawn to South Asia by a low-pressure area, which generates surface winds that transport humid air into India from the southwest. These inflows are caused by a northward shift in the local jet stream, which is caused by increased summer temperatures in Tibet and the Indian subcontinent.

The advancing monsoon, often known as the rainy season, occurs from June to September and brings the most rainfall to India. Rainfall distribution over India:
i) High-rainfall locations: These locations receive more than $200$ cm of rain per year. The western coast and sub-Himalayan ranges, as well as the Meghalaya Hills, Assam, West Bengal, and the western and southern slopes of the eastern Himalayas, receive the most rainfall.
ii) Areas with $100 - 200$ cm of rainfall come into the moderate rainfall category. This range includes Gujarat, East Tamil Nadu, the North-eastern Peninsular, the Western Ghats, eastern Maharashtra, Madhya Pradesh, Odisha, and the middle Ganga valley.
iii) Low-rainfall zones: These places receive $50 - 100$cm of rain per year. Areas with less rainfall include the upper Ganga valley, eastern Rajasthan, Punjab, Karnataka's Southern Plateau, Andhra Pradesh, and Tamil Nadu.
iv) Drought-prone zones: These areas get less than \[50\] cm of rain per year. This category includes northern Kashmir, western Rajasthan, Punjab, and the Deccan Plateau.

Note: The Bay of Bengal and Arabian Sea branches of the southwest monsoon arrive separately. The latter is nearly three times stronger than the Bay of Bengal branch and stretches towards a low-pressure system over the Thar Desert.