Geography
Answer
Orographic rainfall — It occurs from the cooling of warm moist air which ascends above the mountain barrier lying in the direction of the prevailing winds. The presence of mountains causes humid air to rise. The sudden ascent causes cooling of air, leading to condensation and precipitation.
Convectional rainfall — This type of rainfall is common in equatorial regions. The high temperature leads to the rapid heating of air. Such heated air rises in convectional currents, leading to development of clouds at about 10 km height. Ascending currents of hot and humid air causes condensation of the clouds, resulting in heavy rainfall.
Related Questions
How is dew formed? What is the difference between fog and mist?
Draw a well labelled diagram showing convectional rainfall.
Give a geographical reason for each of the following:
A rain shadow area is generally dry.
Give a geographical reason for each of the following:
Frontal rain is common in mid-latitudes.