Convectional rainfall mostly occurs in the equatorial regions.
- High temperature in the equatorial regions results in a high rate of evaporation.
- When the temperatures are high, the air gets heated. Warm air rises higher in the atmosphere; it then expands and spreads at the top. Ascending currents of hot and humid air result in condensation and the formation of cumulonimbus clouds of a great vertical extent.
- Such clouds give heavy rainfall. This rainfall is associated with thunder and lightning.
- The Amazon river basin lies in the equatorial region, and hence, it rains almost every day.
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