Maximum precipitation on the east and west coasts of Indian Peninsula

There is more rainfall on the west coast than on the east coast.

Most of South Asia lies north of the equator and south of 30 north latitude. Except Maldives and southern Sri Lanka, which are close to the equator, they belong to tropical rain forest climate, while northwestern India and southern Pakistan belong to tropical desert climate, and most other areas belong to tropical monsoon.

Climate. The formation of South Asian monsoon climate is closely related to the thermal difference between sea and land in winter and summer, the seasonal displacement of planetary wind belt and the topographic effect of Qinghai-Tibet Plateau. According to the advance and retreat of monsoon, a year can be divided into three seasons: cool, hot and rainy. /kloc-From October to February, the northeast monsoon blowing from the mainland to the ocean brings sunny, dry and cool weather, which is a cool season. In the cool season, the daily temperature difference is large, there is some cyclone rainfall in the northwest, and there is also more precipitation on the east coast of the peninsula. From March to May, as the direct point of the sun moves northward, the temperature rises rapidly and the climate is dry and hot, which is called hot season. The temperature in the central Deccan Plateau reaches 35℃, and the absolute maximum temperature in thar desert reaches above 50℃. Sandstorms occur from time to time. From June to September, due to the continuous high temperature in South Asia, there was a thermal depression in northwest India, which strongly attracted the southwest monsoon deflected by the southeast trade winds across the equator.

Thereby further strengthening the influence of southwest monsoon. The southwest monsoon passes through the vast and warm tropical ocean and is full of water vapor, which brings abundant precipitation to most parts of South Asia and forms the rainy season. 90% of the annual precipitation is concentrated in the rainy season. rain

The arrival time of this season is the earliest in the west of the peninsula and the latest in the northwest of India. The late arrival and early departure of the southwest monsoon is one of the main reasons for the large precipitation variability in South Asia. 10 ~ 1 1 At the end of the rainy season, the temperature began to decrease gradually, and the northern region.

The air pressure gradually increased, so the pressure gradient between land and sea gradually weakened, so the southwest monsoon began to contract, the precipitation decreased, and it soon turned into a cool season.

Indian rainforest

Tropical monsoon forest covers a vast area, and its distribution is closely related to precipitation. The west reaches the west side of the mountain, and the east reaches the south side of the Himalayas, Assam and most of Sri Lanka Island. Most of the annual precipitation is in

Above 2000mm, it is a tropical rainforest area; The annual precipitation in most areas of Deccan Plateau is 1, 000 ~ 2,000 mm, and the defoliation of trees in dry season reduces evaporation in hot season. Deccan Plateau and the interior of Indian Peninsula

The annual precipitation in the northwest is between 500 ~ 1 000 mm, mostly shrubs and grassland vegetation; Thar desert and its surrounding areas, with little rainfall, are desert and semi-desert, with only sparse herbs and prickly irrigation.