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Question
What is rainfall? How many types of rainfall are there? Write in detail with illustrations.
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Solution
Instructions:
- Define rain.
- Explain the types of rainfall with diagrams.
Solution:
- Rainfall is one of the most common forms of precipitation we observe globally.
- On the basis of its origin, rainfall can be classified into convectional, orogenic, and cyclonic rainfall.
Types of rainfall:
Convectional rainfall:
- The earth’s surface gets heated and heats the moist air over it. This air rises into the atmosphere, cools down and condenses to form clouds, resulting in rain.
- Globally, convectional rain takes place in equatorial regions.
Orogenic rainfall:2
- Orographic rainfall occurs when the rain-bearing clouds from the sea reach the land and move upwards along the mountain slopes. The upward ascension of clouds causes them to cool down, condense, and rain.
- Rainfall occurs on the windward side of the mountain. The rainfall on the other side of the mountain is very low. This region is called the leeward side.
- In India, the Western Ghats experience orographic rainfall.
Cyclonic rainfall:
- A cyclone is a specific air formation when the pressure in an area is less than the surrounding regions.
- Air from the surrounding region comes toward the centre of the cyclone and starts moving upwards.
- As it rises, the temperature of the air reduces, condensation occurs, and rainfall occurs.
- Define rain.
- Explain the types of rainfall with diagrams.
- Rainfall is one of the most common forms of precipitation we observe globally.
- On the basis of its origin, rainfall can be classified into convectional, orogenic, and cyclonic rainfall.
Convectional rainfall:
- The earth’s surface gets heated and heats the moist air over it. This air rises into the atmosphere, cools down and condenses to form clouds, resulting in rain.
- Globally, convectional rain takes place in equatorial regions.
- Orographic rainfall occurs when the rain-bearing clouds from the sea reach the land and move upwards along the mountain slopes. The upward ascension of clouds causes them to cool down, condense, and rain.
- Rainfall occurs on the windward side of the mountain. The rainfall on the other side of the mountain is very low. This region is called the leeward side.
- In India, the Western Ghats experience orographic rainfall.
- A cyclone is a specific air formation when the pressure in an area is less than the surrounding regions.
- Air from the surrounding region comes toward the centre of the cyclone and starts moving upwards.
- As it rises, the temperature of the air reduces, condensation occurs, and rainfall occurs.
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