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प्रश्न
What is meant by a ‘Rain Shadow’ area?
What is the meaning of a rain shadow area?
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उत्तर १
The leeward side of the hill is called ‘Rain Shadow’ area which remains dry because the winds are blocked by the hills.
उत्तर २
The rain shadow area is the dry region on the leeward side (the side sheltered from the wind) of a mountain range. When moisture-laden winds are forced to rise over mountains, the air cools and condenses to form rainfall on the windward side. As the air descends on the opposite side, it becomes warmer and drier because most of the moisture has already been lost as precipitation. This results in very little or no rainfall on the leeward side, creating the rain shadow area.
A classic example of this is the Western Ghats in India. The monsoon winds bring heavy rain to the windward (western) side, while the leeward side receives hardly any rain and often faces acute water shortages. The rain shadow area tends to have sparse vegetation compared to the lush windward side.
संबंधित प्रश्न
Mention the geographical reason for the following:
Western Rajasthan receives no rain from the Arabian Sea branch of the South West Monsoon winds.
Give reasons for the following:
When the Malabar Coast is receiving heavy rainfall in July, the Tamil Nadu coast is comparatively dry.
Give the characteristics and effects of the monsoon rainfall in India.
What are ‘Western Disturbances’?
Why are Himalayas called perfect climate divide? Explain their two-fold functions in this regard.
Rajasthan receives very little rainfall.
Given below is the climatic data of a station. Study the table and answer the questions that follow:
| Month | Jan. | Feb. | Mar. | Apr. | May | June | July | Aug. | Sep. | Oct. | Nov. | Dec. |
| Temperature °C | 24.5 | 25.7 | 27.7 | 20-4 | 30.0 | 32.5 | 31.0 | 30.2 | 29.8 | 28.0 | 25.9 | 24.7 |
| Rainfall cm | 4.6 | 1.3 | 1.3 | 1.8 | 3.8 | 4.5 | 8.7 | 11.3 | 11.9 | 30.6 | 35.0 | 13.9 |
- Calculate the annual rainfall experienced by the station.
- What is the annual range of temperature?
- Name the wettest month.
Study the climatic data provided below and answer the questions that follow:
| Month | Jan | Feb | Mar | Apr | May | June | Jul | Aug | Sep | Oct | Nov | Dec |
| Station A (sea level) | ||||||||||||
| Temperature (°C) | 24.4 | 28.4 | 20.7 | 29.3 | 30.0 | 29.9 | 29.8 | 27.8 | 26.9 | 26.3 | 25.1 | 24.8 |
| Rainfall (cm) | 0.1 | 0.1 | 0.5 | 0.6 | 3.8 | 26.6 | 29.6 | 30.5 | 26.5 | 11.9 | 1.1 | 0.2 |
| Station B (800 m above sea level) | ||||||||||||
| Temperature (°C) | 8.1 | 8.9 | 15.6 | 20.1. | 25.2 | 24.3 | 24.1 | 22.7 | 20.6 | 18.4 | 14.1 | 9.6 |
| Rainfall (cm) | 0.4 | 0.3 | 0.3 | 1.1 | 1.3 | 3.2 | 7.7 | 1.3 | 5.8 | 0.7 | 0.4 | 0.3 |
- Calculate the annual range of temperature of Station A Suggest a reason why the range is small one.
- Which of the two Stations has the lower temperature? Why?
- Calculate the annual rainfall of Station B.
Seventy-five percentage of Indian rainfall is from this wind.
Now find out
Why is Shillong rainier than Kolkata?
