ESCI 314 -1
Group 6’s Report
9 July 2014
Baltazar, Kenneth Regin I.
San Agustin, Joshua Manuel
Villena, Eldie Naza
Submitted to: Engr. Julius Angelo M. Lozada
Types of Deserts
Trade wind deserts
The trade winds lie in areas crossed by the trade winds. in two belts on the equatorial sides of the Horse Latitudes heat up as they move toward the Equator. These dry winds dissipate (disperse or scatter) cloud cover, allowing more sunlight to heat the land. Most of the major deserts of the world Midlatitude deserts
Occur between 30° and 50° N. and S., pole ward of the subtropical high pressure zones. Located in interior continents. Also called “cold desert” due to its very cold winters. Rain shadow deserts
Rain shadow deserts are formed because tall mountain ranges prevent moisture-rich clouds from reaching areas on the lee, or protected side, of the range. As air rises over the mountain, water is precipitated and the air loses its moisture content. A desert is formed in the leeside "shadow" of the range. Coastal deserts
Coastal deserts generally are found on the western edges of continents near the Tropics of Cancer and Capricorn. They are affected by cold ocean currents that parallel the coast. Because local wind systems dominate the trade winds, these deserts are less stable than other deserts. Polar deserts
Polar deserts are areas with annual precipitation less than 250 millimeters and a mean temperature during the warmest month of less than 10°C. Polar deserts on Earth cover nearly 5 million square kilometers and are mostly hard bedrock or gravel plains. Sand dunes are not prominent features in these deserts, but snow dunes occur commonly in areas where precipitation is locally more abundant. Temperature changes in polar deserts frequently cross the freezing point of water. This "freeze-thaw" alternation forms patterned textures on the ground, as much as 5 meters in diameter. Most of the interior of Antarctica is a polar desert, despite the thick ice cover. Conversely, the McMurdo Dry Valleys of Antarctica, although they have been ice-free for thousands of years, are not necessarily polar desert: they are kept "dry" by katabatic wind. How people live in Deserts
Clothing is versatile and based on robes made of rectangles of fabric. Long-sleeved, full-length, and often white, these robes shield all but the head and hands from the wind, sand, heat, and cold. White reflects sunlight, and the loose fit allows cooling air to flow across the skin. Types of Clothes:
Thobe - a full-length, long-sleeved white robe.
Abaya - a sleeveless cloak that protects the wearer from dust and heat. Djebba - a short, square pullover shirt worn by men.
Kaffiyeh - is a rectangular piece of cloth folded loosely around the head to protect the wearer from sun exposure, dust, and sand. It can be folded and unfolded to cover the mouth, nose, and eyes. Turban - similar to a kaffiyeh, but wrapped around the head instead of being secured with an agal. Turbans are also much longer Shelter
Ancient people at deserts constructed huge apartment complexes in the rocky cliffs. These cliff dwellings, sometimes dozens of meters off the ground, were constructed with thick, earthen walls that provided insulation. Although temperatures outside varied greatly from day to night, temperatures inside did not. Tiny, high windows let in only a little light and helped keep out dust and sand. In rural areas, hot days turn into cool nights, providing welcome relief from the scorching sun. But in cities, structures like buildings, roads, and parking lots hold on to daytime heat long after the sun sets. The temperature stays high even at night, making the city an “island” of heat in the middle of the desert. This is called the urban heat island effect. It is less pronounced in desert...
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