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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
Give a reason for each of the following:
The Summer Monsoon winds blow over the Arabian Sea from the South West.
Study the climatic data given below and answer the questions that follow:
| Month | Jan | Feb | Mar | Apr | May | June | July | Aug | Sep | Oct | Nov | Dec |
| Temperature in °C |
12.0 | 25.5 | 26.3 | 27.1 | 30.0 | 36.2 | 36.0 | 35.9 | 30.3 | 28.4 | 21.0 | 16.6 |
| Rainfall cm | 1.5 | 0.1 | 0.0 | 1.4 | 1.1 | 21.0 | 25.3 | 27.2 | 24.0 | 9.4 | 1.5 | 0.4 |
1) What is the annual range of temperature of the station?
2) What is the total annual rainfall experienced by the station?
3) Why would it be correct to presume that the station lies in the interior and not on the coast?
Study the climate data given below and answer the questions that follow:
| Month | Jan | Feb | Mar | Apr | May | June | July | Aug | Sep | Oct | Nov | Dec |
| Temperature in °C |
25.0 | 25.5 | 26.3 | 27.1 | 30.0 | 36.2 | 36.0 | 35.9 | 35.9 | 29.3 | 27.0 | 24.6 |
| Rainfall cm | 24.5 | 23.1 | 15.0 | 2.4 | 0.1 | 11.0 | 9.3 | 4.0 | 10.5 | 4.0 | 14.5 | 20.4 |
1) Calculate the annual temperature range.
2) What is the total annual rainfall?
3) Presuming that the station is located in India, give a reason for its location being on the east coast or west coast of India.
Why are Himalayas called perfect climate divide? Explain their two-fold functions in this regard.
Mumbai receives rainfall in the summer season while Chennai receives rainfall from October to December. Why?
Study the climatic data provided below and answer the questions that follow:
| Month | J | F | M | A | M | J | J | A | S | O | N | D |
| Station A | ||||||||||||
| Temp °C | 21.0 | 22.6 | 26.3 | 29.2 | 29.7 | 27.5 | 25.1 | 24.5 | 24.8 | 25.5 | 22.5 | 20.5 |
| Rain cm | 0.1 | 0.1 | 0.5 | 1.5 | 2.7 | 11.4 | 16.7 | 9.0 | 13.4 | 9.0 | 2.7 | 0.3 |
| Station B | ||||||||||||
| Temp °C | 24.4 | 24.4 | 26.7 | 28.3 | 30.0 | 28.9 | 27.2 | 27.2 | 27.2 | 28.3 | 27.2 | 25.0 |
| Rain cm | 0.2 | 0.3 | 0.3 | 1.7 | 1.9 | 50.2 | 61.0 | 37.0 | 27.0 | 4.8 | 1.4 | 0.3 |
(i) Calculate the annual range of temperature of Station B.
(ii) Calculate annual rainfall of Station A.
(iii) Presuming that both the stations are located in West India, state giving a reason as to which of the two lies on the windward side of the Western Ghats.
Study the table given below and answer the questions that follows:
| Station | Months | J | F | M | A | M | J | J | A | S | O | N | D |
| A | Temperature in °C | 12.7 | 15.1 | 22.1 | 31.8 | 37.2 | 39.1 | 37.3 | 33.4 | 28 | 26.7 | 16.1 | 13.6 |
| Rainfall in cms | 2.1 | 2.3 | 1.0 | 0.9 | 1.5 | 5.6 | 18.3 | 18.9 | 15.1 | 0.6 | 0.3 | 1.8 | |
| B | Temperature in °C | 23.1 | 24.8 | 26.5 | 29.3 | 32 | 32.8 | 33.1 | 32.1 | 30.5 | 29.3 | 28.7 | 26.1 |
| Rainfall in cms | 15.3 | 10.1 | 0.3 | 0.1 | 1.3 | 4.5 | 6.1 | 10.2 | 10.5 | 20.1 | 16.8 | 19.0 |
(a) Calculate the annual rainfall in station A.
(b) What is the annual range of temperature in station B?
(c) Name the winds that bring most of the rainfall to station B. State one reason for your answer.
The average rainfall of India is about ______.
The highest rainfall region in India is located in this state.
Now find out
Why is Shillong rainier than Kolkata?
