Rainfall is sporadic and in some years no measurable precipitation falls at all.
The terribly dry conditions of the deserts is due to the year-round influence of subtropical high pressure and continentality.
- Africa: Sahara, Kalahari and Namib deserts.
- Asia: the Middle East and Thar desert of India.
- North America: Colorado, Mohave and Mexican deserts.
- South America: Atacama desert.
- Australia: the Great Australian desert.
GENERAL CHARACTERISTICS OF TROPICAL DESERT CLIMATE.
- High mean monthly temperature, 29 degree Centigrade in the hot season.
- During the cool season, temperatures can be as low as 10 degree Centigrade.
- Daytime temperatures can rise to 47 degree Centigrade or more.
- Night temperature can drop to as low as 5degree Centigrade.
- Annual temperature range is very high. It can reach 26 degree Centigrade.
Desert conditions hardly support meaningful human activities because of the very high temperatures experienced during the day.
This causes a scarcity of water and food. However, the animal, the camel, has adapted to desert conditions and can survive for many days without water.
Here, they hunt desert animals and gather wild fruits for food. However, this group of people is not as active as they were long ago.
This is because of constant migration to other areas and the growth of towns and cities.
In deserts, there are depressions of varying sizes where underground water reaches the surface.