write any four characteristics features of summer monsoon
Answers
1. Monsoons are a global phenomenon, especially in the tropical regions of Earth.
2. Monsoons are the heavy rains during the rainy season , usually from June to September. They occasionally extend to October. So its duration is 3 to 4 months in each year. Monsoons occur around the same period every year.
3. There are large scale sea or ocean breezes during the monsoons.
4. They are due to big temperature and pressure differences between the land and the sea nearby. Usually the land is hot and the sea is cooler. So the air on top of them travels with great speed and carries a lot of precipitation.
5. For India, there are SouthWest Monsoons and NorthEast Monsoons. The first comes from the Arabian Sea and the latter comes from the Bay of Bengal.
6. The amount of rainfall (precipitation) and intensity of rains are not the same each year. They depend on the global temperatures, wind pressures, pollution and Earth's rotational effects.
7. They are not predictable completely yet. The prediction can be done only for some 24 or 48 hours.
8. The monsoons arrive usually after the summer season.
9. There are many gaps between rainfalls during the monsoon season.
10. Some monsoons result in cyclones. Occasionally thunderstorms and lightnings are observed. In some places occasionally hailstorms are observed.
Answer:
Main features of the rainfall in India are :
- There is rainfall over three months and the rest of the year is almost dry. Seventy per cent of annual rainfall occurs in the rainy season.
- The rains are mainly of relief type. The windward slopes the mountains get more rainfall than the leeward side.
- Only a small portion of the rainfall is received from sources other than the monsoon, like cyclonic rainfall and convectional rainfall.
- The quantity and the time of occurrence of rainfall cannot be predicted as the rainfall is erratic. It is because of this uncertainty that sometimes there are floods; and sometimes droughts.
- India has an agrarian economy dependent on rainfall. As such rainfall affects the economy of the country.
Explanation: