What is the role of rainfall in the desert?
Answers
Answer:
Many factors affect precipitation in deserts. Mountains often cause an effect called "rainshadow." This effect causes moisture-laden air to release its water on one side of a mountain range, contributing to desert on the other side. Atmospheric conditions such as pressure can also contribute to deserts.
Answer:
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Explanation:
Most deserts get what little precipitation they do receive in a few, heavy rainfalls, rather than many light rains spread out over the course of the year. This leads to seasonal lakes and rivers which may last a few months, or even only a few days. Dry river beds are a common sight in many deserts, and are called wadis in some African and Middle Eastern deserts. Some rainfalls may bring torrents of 5 to 10 cm of rain in a few hours, leading to flash flooding in ravines or canyons, a seemingly paradoxical occurrence in the driest places on Earth. Arctic and Antarctic deserts receive their precipitation almost entirely as snow.