Why does a summer rainstorm lower the temperature?
Answers
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Answer:
The cold air that rushes in brings down the temperature of the hot region. Due to this sudden change in temperature, the moisture that rises above the hot region condenses rapidly and falls down as rain.
Explanation:
During summer, the sun being overhead, there is intense heating of the land and the air above as compared to the surroundings. The air. on being heated, becomes lighter and rises.
As the specific heat of water is higher than that of the land, it takes more time to heat the water, whereas the land gets heated up quickly. This causes air to rise, creating an intense low-pressure condition on the surface. As the air rises, it expands and loses heat.
The warm, moist air on cooling thus, reaches a point called the condensation level, where the water vapour condenses and turns back into a liquid. This process of condensation leads to the formation of clouds in the atmosphere. As the clouds continue to grow and when they cannot bear the weight of water droplets, it leads to precipitation.
This process of rising air is called convection and the type of rainfall which occurs during peak summer is called convectional rainfall.
This process also leads to the formation of Cumulonimbus clouds (formed due to intense low pressure or atmospheric instability), which causes heavy rainfall, but for a short duration accompanied by thunderstorms.