How does a desert form?
I'm sure it happens gradually, but during the event of a climate change, where do the sands come from that change a habitable area into a desert?
- ?Lv 78 years agoFavourite answer
Deserts are areas that receive very little precipitation. People often use the adjectives “hot,” “dry,” and “empty” to describe deserts, but these words do not tell the whole story. Although some deserts are very hot, with daytime temperatures as high as 54°C (130°F), other deserts have cold winters or are cold year-round. And most deserts, far from being empty and lifeless, are home to a variety of plants, animals, and othwer organisms. People have adapted to life in the desert for thousands of years.
One thing all deserts have in common is that they are arid, or dry. Most experts agree that a desert is an area of land that receives no more than 25 centimeters (10 inches) of precipitation a year. The amount of evaporation in a desert often greatly exceeds the annual rainfall. In all deserts, there is little water available for plants and other organisms.
Deserts are found on every continent and cover about one-fifth of Earth’s land area. They are home to around 1 billion people—one-sixth of the Earth’s population.
Although the word “desert” may bring to mind a sea of shifting sand, dunes cover only about 10 percent of the world’s deserts. Some deserts are mountainous. Others are dry expanses of rock, sand, or salt flats.
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1. Atmospheric high pressure zones (Hadley Cells)
2. Continentality or (Distance from oceans) –
3. Coastal Cooling
4. Rainshadow effects
I hope this is helpful.Source(s): http://education.nationalgeographic.com/education/... http://faculty.unlv.edu/landau/desertgeography.htm
- 8 years ago
When Lakes or Seas dry up, desert's form. The bottom of the waterform is sand and also desert's are made from sand. A habitable are cant turn into a desert, as I said only whem WATERFORMS ( Lakes,Seas) DRY up. A landform can't gradually turn into a desert.
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- Tim DLv 78 years ago
A desert might form when mountain building forms a rain shadow, e.g. the atlas mountains, or if a lot of moisture is locked up in polar caps. Sands result from dessication.
- Jack of SpadesLv 48 years ago
Like some of the other answerers said, desserts don't always contain large amounts of sand. Yet dry climates can lead to the formation of a sandy dessert. This happens because plants bind soil particles together to form larger soil particles. This is referred to as the structure of your soil. Soil structure protects the soil from erosion.
When you have a dry climate, there is usually only an extremely small amount of plant life. When plants die, the soil or sediment becomes exposed to wind erosion which can easily remove the smaller clay or silt fraction from your soil, but because sand particles are larger and heavier more of them tend to stay behind.
If this happens for a long enough time your sediment will tend to become richer in sand and poorer in silt and clay.
Hope this helped.Source(s): Student of geology.
- Anonymous8 years ago
when 2 planet burst
- Anonymous7 years ago