- For the food course, usually served after dinner, see dessert.
Desert view desart in Saudi Arabia. The vast majority of the kingdom is sand desert, with distinct dedert features and characteristics that clearly differ between one area and another.
In geography, a desert is a landscape form or deser region that receives very little precipitation. Generally deserts are defined as areas desery that receive an average annual desrt precipitation of less than 250 mm (10 inches). The terminology used to define deserts is complex. deset 'True deserts' where vegetation cover is exceedingly sparse, correspond desret to the 'hyperarid regions of the earth, where rainfall desert is exceedingly rare and infrequent. Deserts are however part of desert eagle a wider classification of regions that, on an average annual basis, have a moisture deficit (i.e deserts they can potentially lose more than is received). These areas are collectively called desert rose 'drylands' and extent over almost half of the earth's land surface. sahara desert Because desert is a vague term, the use of 'dryland', and its subdivisions of hyper arid, desert plants arid, semiarid and dry-subhumid, is to be preferred, and desert biome is approved by the United Nations.
Deserts cover at least one-fifth of the Earth's land surface. desert storm Deserts are very arid palm desert real estate (dry) and can have high temperatures of 50°C+. Even though the desert is very hot in the day, it is extremely gaara of the desert cold at night. Deserts have quite rough desert rose mp3 terrain, many sand dunes and present an overwhelmingly hostile environment. Humans that travel unprepared into deserts palm desert commercial real estate have a slim chance of survival due to the relative dearth of water.
Deserts have desert schools federal credit union a reputation for supporting very little life, but gobi desert in reality deserts often have high biodiversity, including animals that remain hidden during daylight desert schools credit union hours to control body temperature or to limit moisture needs.
Desert landscapes sonoran desert have certain distinctive features. Deserts are often composed of sand and rocky desert biomes surfaces. Sand dunes called ergs and stony surfaces called Reg mojave desert or hamada surfaces compose a minority of desert surfaces. Exposures of painted desert rocky terrain are typical, and reflect minimal soil development and sparseness of vegetation. Bottom lands kalahari desert may be salt-covered flats. Eolian (wind-driven) processes are major factors in shaping desert landscapes. Cold deserts have desert punk similar features but the main form of precipation is snow rather sting desert rose than rain. The largest cold desert is Antarctica (composed of about desert sun 98 percent thick continental ice sheet and 2 percent real estate palm desert barren rock). The largest hot deserts of the world desert is the Sahara.
Deserts sometimes contain valuable mineral deposits that were formed in palm desert properties the arid environment or that were exposed by erosion. Because deserts are dry, they are ideal simpson desert places for human artifacts and fossils to be preserved.
Deserts usually have an extreme temperature range. Most deserts have a atacama desert low temperature at night. This is desert tortoise because the air is very dry (contains desert rose sting little moisture) and therefore holds little heat so as soon as the sun sets, the arabian desert desert cools quickly. Also, cloudless skies increase the release of heat at night.
In the Köppen climate desert recipes classification system, deserts are classed desert oasis as (BW).
- 1 Types of desert
- 2 Desert operation desert storm features
- 3 Mineral jewel in the desert resources
- 4 Trivia
- 5 See desert storm syndrome also
- 6 External links
Types of desert
The Thar Desert near Jaisalmer, India
High desert palm desert california real estate in Eastern Oregon, United States
The Agasthiyamalai hills, cuts of Tirunelveli(India) from the monsoons, creating a rainshadow region
Most classifications the desert sun rely on some combination of the number mount desert island of days of rainfall, the total amount of annual rainfall, temperature, humidity, or other factors. In 1953, Peveril Meigs divided desert regions palm desert national bank on australian desert Earth into three categories according to the amount of precipitation they received. In this now widely accepted system, extremely arid lands high desert homes have at least 12 consecutive months without rainfall, palm desert arid lands have less than 250 millimeters of annual rainfall, and semiarid lands have map of sahara desert a mean annual precipitation of between desert eagle pistol 250 and 500 millimeters. Arid and extremely arid land are deserts, and semiarid grasslands generally are referred to as steppes.
However, lack desert rat of rainfall alone can't high desert california homes provide an accurate description of what a desert is. For example, Phoenix, Arizona receives less than 250 millimeters (10 inches) of precipitation example of commensalism in the desert per year, and is immediately recognized as being located sun desert in a desert. The North Slope of Alaska's Brooks Range also receives less than 250 arizona desert millimeters of precipitation per year, but .50 caliber desert eagle is not generally recognized as a desert region.
The difference lies in something termed "potential evapotranspiration." The carol jensen desert dispatch water budget of realtors palm desert an area can be calculated using the formula P-PE+/-S, wherein P is precipitation, PE is potential evapotranspiration rates and S is amount of high desert surface storage of water. Evapotranspiration is the combination of desert landscaping water loss through atmospheric evaporation, coupled with the evaporative loss high desert custom homes of water through the life mount desert island maine processes of plants. Potential evapotranspiration, then, is the amount of water that could evaporate palm desert homes in any given region. Tucson, Arizona receives about 300 millimeters, (12 inches), palm desert real estate listings of rain per year, however about 2500 millimeters, (100 inches), of high desert property water could evaporate over the course of a year. In other words, about 8 times more water could evaporate from the region palm desert golf properties than actually falls. Rates palm desert real estate listing of evapotranspiration in other regions such as Alaska are much lower, so while these regions receive new homes palm desert minimal precipitation, they should be designated as specifically different australian deserts from the simple definition of a desert: a place where evaporation exceeds precipitation.
That said, there are different desert boots forms of deserts. Cold deserts can be covered in snow; such locations desert diamond casino don't receive much precipitation, and what does fall remains frozen as snow palm desert real estate appraisal pack; these are more commonly referred to as tundra if a short season of palm desert realtors above-freezing temperatures is experienced, desert sales jobs or as an ice cap if the temperature remains below freezing year-round, rendering the land almost completely lifeless.
Most non-polar deserts palm desert area country club real estate information are hot because they have little water. Water tends to palm desert realestate have a cooling, or at least black rock desert a moderating, effect in environments where it is plentiful. In some parts of the world deserts desert pictures are created by a rain shadow effect ironwood palm desert real estate in which air masses lose much of their moisture as they move over a mountain range; other areas are arid by franciscan desert rose china virtue of being very far from the nearest available sources palm desert luxury real estate of moisture (this is true in some middle-latitude landmass interior locations, particularly in Asia).
Deserts are desert climate palm desert california real estate associations also classified by their geographical location and dominant weather pattern as trade wind, mid-latitude, rain shadow, coastal, monsoon, or polar real estate palm desert california deserts. Former desert areas presently in non-arid environments are paleodeserts.
Montane deserts sting desert rose mp3 are arid places with a very high altitude; the most prominent example is found desert sunset north of deserts the falafel oasis the Himalaya, in parts of the Kunlun Mountains and the Tibetan Plateau. Many locations within this palm desert real estate tax benefits category have elevations exceeding 3,000 meters (9,843 symbiotic relationships in desert species feet) and the thermal regime can be hemiboreal. These places owe their desert song profound aridity (the average annual precipitation is often less than 40mm) to being very palm desert real estate agents far from the nearest available sources of moisture.
palm springs desert alliance real estate
Satellite view of Al-Dahna desert in real estate listing palm desert Saudi Arabia. Different depositional features can be clearly seen.
Sand covers only about 20 percent dyson and dyson real estate palm desert of Earth's deserts. Most of the sand is in sand sheets and sand seas—vast regions of undulating dunes resembling mission hills real estate palm desert ocean waves "frozen" in palm desert real estate for sale an instant of time. In general, there are 6 forms of deserts:
- Mountain and city is palm desert and job category is real estate basin deserts;
- Hamada deserts, which comprise of plateaux landforms;
- Regs which desert burn hoodia consist of rock pavements;
- Ergs which are formed by sand seas;
- Intermontane Basins; and
- Badlands which are located at the margins of arid lands comprising desert people of clay-rich soil.
Nearly all desert surfaces are plains agency desert estate palm real where eolian deflation—removal of fine-grained material by the wind—has exposed loose gravels consisting predominantly of ironwood country club palm desert real estate pebbles but with occasional cobbles.
The remaining surfaces of arid lands real estate schools palm desert are composed of exposed bedrock outcrops, desert soils, becker real estate palm desert and fluvial deposits including alluvial fans, playas, desert lakes, and oases. Bedrock outcrops commonly occur as desert eagle pistol for sale small mountains surrounded by extensive erosional plains.
There are several different types of dunes. Barchan dunes desert moon are produced by mls listings palm desert real estate strong winds blowing across a level surface and are crescent-shaped. Longitudinal or seif dunes are palm desert california real estate for sale dunes that are parallel to a strong wind that palm desert golf course real estate blows in one general direction. Transverse dunes run at a right angle to the constant wind direction. Star dunes palm desert real estate tax shelter s are star-shaped and have several ridges that spread out around real estate agent palm desert california a point.
Oases are vegetated areas moistened fairfield grand desert by springs, wells, or by irrigation. Many are artificial. Oases are often the only places in deserts palm desert california real estate agents that support crops and permanent habitation.
Flora of Baja California Desert, palm desert real estate mls search Cataviña region, Mexico
Most desert plants are drought- or salt-tolerant, such as xerophytes. palm desert real estate sales Some store water in their leaves, roots, and stems. Other desert plants have long palm desert residential real estate tap roots that penetrate to the water table if present. desert hearts The stems and leaves of some plants lower the surface velocity of sand-carrying winds palm desert california real estate appraisers and protect the ground from erosion. Even small fungi and microscopic plant organisms found on the soil surface thar desert (so-called cryptobiotic soil) can be united states desert fatigues a vital link in preventing erosion and providing support for other living organisms.
Deserts typically jackson palm desert real estate monterey have a plant cover that is sparse but enormously diverse. The Sonoran Desert of the American Southwest has the most palm desert california real estate investment complex desert vegetation on Earth. The giant saguaro cacti provide nests richard lee resort quest real estate palm desert california for desert birds and serve as "trees" of caldwell banker real estate palm desert the desert. Saguaro grow slowly but may live 200 great victoria desert years. When 9 years old, they are about 15 centimeters high. After about 75 years, the cacti sonora desert develop their first branches. When fully grown, saguaro are 15 meters tall and kimber desert warrior weigh as much as 10 tons. They dot the palm desert real estate agent Sonoran and reinforce the general impression of deserts as cactus-rich land.
Although cacti are often thought casa grande desert of as characteristic desert plants, other types of plants have adapted desert iguana well to the arid environment. palm desert mls real estate They include the pea and sunflower families. Cold deserts have grasses and shrubs as dominant vegetation.
The shifting sands desert eagle firearms simulator at Questacon, Canberra
Rain does fall occasionally in deserts, and desert storms are desert island often violent. A record 44 millimeters of rain once fell desert vista high school within 3 hours in the Sahara. Large Saharan storms may deliver up desert willow to 1 millimeter per minute. Normally dry stream channels, called arroyos or wadis, can quickly fill gobi desert map after heavy rains, and flash floods make these channels dangerous.
Though little rain falls high desert church in deserts, deserts receive runoff from ephemeral, or short-lived, streams palm desert california real estate directories fed considerable quantities of sediment for a day or two. palm desert real estate market Although most deserts are in basins with closed, or interior palm desert real estate orchard drainage, a few deserts are crossed by 'exotic' rivers that derive their water from outside the desert. desert sessions Such rivers infiltrate soils and evaporate large amounts of water on their journeys through the sahara desert plants deserts, but their volumes are such that they maintain their continuity. desert rose plant The Nile River, the Colorado River, and the Yellow River are exotic desert survival rivers that flow through deserts to deliver their sediments to the sea. Deserts may woodhaven country club palm desert real estate also desert lizards have underground springs, rivers, or reservoirs that lay close to the surface, or deep underground. Plants that have not completely adapted to desert food web sporadic rainfalls in a desert inn desert environment may tap into underground water sources that do not exceed the reach of their root systems.
Lakes form desert racing where rainfall or chihuahuan desert meltwater in interior drainage basins is sufficient. Desert lakes are generally shallow, temporary, and salty. Because these lakes are desert facts shallow and have a low bottom gradient, wind stress may cause the lake waters desert spiders to move over many square kilometers. When small lakes dry up, they leave a great basin desert salt crust high desert museum or hardpan. The flat area of clay, silt, or sand encrusted largest desert with salt that forms is known as a playa. There are more than a hundred playas in North American desert eagle airsoft pistol deserts. Most are relics desert photos of large lakes that existed during the last ice age about 12,000 years ago. Lake Bonneville was a 52,000-square-kilometer lake almost namib desert 300 meters deep in Utah, Nevada, and Idaho during mutualism in the desert the Ice Age. Today the remnants of Lake Bonneville include Utah's Great Salt Lake, Utah Lake, the desert and Sevier Lake. Because playas are arid land forms from a wetter past, cold desert they contain desert combat useful clues to climatic change.
When the occasional precipitation does occur, it erodes the palm desert high school desert rocks quickly and powerfully. Winds are the other factor that erodes deserts - they priscilla queen of the desert are constant yet slow.
The flat terrains of hardpans and playas make them baby desert eagle excellent race tracks and natural runways for airplanes and spacecraft. Ground-vehicle speed records desert song my chemical romance are commonly established on Bonneville Speedway, mohave desert a race track on the Great Salt Lake hardpan. Space shuttles land on Rogers patagonia desert Lake Playa at Edwards Air Force Base in California.
Some mineral deposits are formed, improved, or preserved by geologic processes that occur in arid lands as desert rain a consequence of climate. Ground water leaches ore minerals and redeposits desert rose bonsai them in zones near the water table. This leaching process concentrates these minerals as ore that information on the war desert storm can be mined.
Evaporation in arid lands enriches mineral california desert real estate accumulation in their lakes. Playas may be sources of mineral desert burn deposits formed by evaporation. Water evaporating in closed basins precipitates minerals such as gypsum, salts desert rose band (including sodium nitrate and sodium chloride), and borates. The minerals formed desert toyota in these evaporite deposits depend on the composition and temperature of the desert trees saline waters at the time of deposition.
Significant evaporite resources occur in high desert state prison the Great Basin Desert of the United States, mineral deposits made forever famous by the "20-mule desert kit fox teams" that once hauled borax-laden wagons desert scenes from Death Valley to the railroad. Boron, from borax and borate evaporites, is an essential ingredient desert sun newspaper in the manufacture of glass, ceramics, enamel, agricultural chemicals, great sandy desert water softeners, and pharmaceuticals. Borates are mined from evaporite patagonian desert deposits at Searles Lake, California, and other desert locations. The total value of chemicals that have been sting - desert rose produced from Searles Lake substantially exceeds US$1 billion.
The Atacama Desert of South America arizona deserts is unique among the deserts of the world desert gardening in its great abundance of saline minerals. Sodium nitrate has been kung bushmen in the kalahari desert mined for explosives and fertilizer in the Atacama since the middle of the 19th century. Nearly 3 the sahara desert million tonnes were mined during World War I.
Valuable minerals located in arid lands include copper in the United desert eagle pistols States, Chile, Peru, and Iran; iron and desert landscape lead-zinc ore in Australia; chromite in Turkey; and gold, desert mountain high school silver, and uranium deposits in Australia and the United States. Nonmetallic mineral resources and rocks such as beryllium, mica, desert hot springs california homes for sale lithium, clays, pumice, and scoria also occur in arid desert soil profile regions. Sodium carbonate, sulfate, borate, nitrate, lithium, bromine, iodine, calcium, desert storm, desert sheild and strontium compounds come from sediments and near-surface brines mexican deserts formed by evaporation of inland bodies of water, often during motorcycle accident lawyers palm desert geologically recent times.
The Green River Formation of Colorado, Wyoming, and Utah desert fox contains alluvial fan deposits and playa evaporites created in a huge lake whose level fluctuated for deserts soul food recipes millions of years. Economically significant deposits of trona, a major source homes for sale in palm desert of sodium compounds, and thick layers of oil shale were jewel of the desert created in the arid environment.
Some of the more productive petroleum areas on Earth are found in arid and semiarid regions of kyzylkum desert Africa and the Mideast, although the oil fields were originally formed medical malpractice attorneys palm desert in shallow marine environments. Recent climate change has placed these reservoirs in an mojave desert map arid environment. It's noteworthy palm desert homes for sale that Ghawar, the world's largest and most productive oilfield is palm desert hotels mostly under the Empty Quarter and Al-Dahna deserts.Currently the verification of SALINITY is unavailable on this pictures of vegetation in the gobi desert page.
Other oil reservoirs, however, are presumed to be eolian in origin and are presently found in desert eagle handguns humid environments. The Rotliegendes, a hydrocarbon reservoir in the desert food webs North Sea, is associated with extensive evaporite deposits. Many of the major U.S. hydrocarbon resources desert ridge may come from eolian sands. Ancient alluvial desert shadows fan sequences may also be hydrocarbon reservoirs.
- 2006 is the International Year of Deserts and Desertification.
- List of deserts
- List of North American deserts
- The Desert Biome. University of California Museum of Paleontology (1996).
- Global Deserts Outlook. United Nations Environment Programme (UNEP) (2006)., a report in the Global Environment Outlook (GEO) series.
Categories: Articles lacking sources | Deserts | Geomorphology | Landforms