Arabian Desert

Map of the Arabian Desert ecoregions as delineated by the WWF. Satellite image from NASA. The yellow line encloses the ecoregion called "Arabian Desert and East Sahero-Arabian xeric shrublands", and two smaller, closely related ecoregions called "Persian Gulf desert and semi-desert" and "Red Sea Nubo-Sindian tropical desert and semi-desert". National boundaries are shown in black.

The Arabian Desert encompasses almost the entire Arabian Peninsula, blanketing the area in sandy terrain and seasonal winds. Encompassing over 2,330,000 square kilometers, the Arabian Desert contains Rub'al-Khali ,one of the world's largest continuous bodies of sand in the world. . As a geographic area the Arabian Peninsula is often considered impassable, due to extremely dry environment and scarcity of visible vegetation. Despite the inhospitable terrain, however, the Arabian desert has served throughout history as a commercial passageway between the Middle East and North Africa.

Geography

Borders and Natural Features

A large proportion of the Arabian Desert lies with the political borders of Saudi Arabia. However, the Arabian Desert is far too vast to fit within the political confines of a single nation, and spills over into neighboring countries. A significant portion of the desert reaches into Yemen in the southwest and Oman on the eastern border. Along the coast of the Persian Gulf, the Arabian Desert extends into the modern sheikdoms of the United Arab Emirates and Qatar. The desert continues its expansion northward from Saudi Arabia as well. reaching into Emirate of Kuwait and Jordan. Traces of the Arabian Desert are also found in Egypt and Iraq.

The vast expanse of the Arabain Desert is formed through a series of natural boundaries that protect the sandy dunes and keep the dusty winds inside the desert. The most prominent borders of the desert are the Gulf of Aden and the Arabian Sea to the southeast and south and the Red Sea in the west. In addition the Persian Gulf and the Gulf of Oman lie to the northeat and east of the desert. The glittering expanses of the sea only serve to highlight the dry nature of the desert and the lack of available water. To the north of the the Arabain Desert, the harsh conditions of the desert climate extend up towards the Syrian Desert, making the desert seem expecially forboding.

While the surrounding seas play a vital role in defining the borders of the Arabian peninsula, the desert itself is contained within a ring of mountain ranges. The most notable of the bordering mountain ranges is found in the southwestern corner of the desert belonging to Yemen. In this area Mount Al-Nabi Shu'ayb towers 12,336 feet above sea level. It has been measured as the heighest point in the Arabian Desert, but is closely rivalled by Mount Al-Lawz (elevation 8,464 feet) in the northwest and Mount Al-Sham (elevation 9,957 feet) in the southeast. Along the northern edges of the Arabian desert the landscape slowly elevates and blends into the topography of the Arab Asia. The section of land where the desert is beginning to transform into a more elevated landscape is refered to as the Syrian Steppe, a treeless plain that is noted for its wild beauty. While the northern edges of the Arabian desert are able to blend seemlessly with the geography of Asia, the southern portions of the desert are much more akin to the land forms found in Somalia and Ethiopia. Some schoalrs speculate that the dual nature of the Arabain Desert is due to a continental split in its early geological formation that broke the Arabain Peninsula away from Africa.

While the Arabian Desert appears inhospitable and barren at first glance, it has proven to be a valuable source for natural resources, including oil, natural gas, phosphates, and sulfur. The Arabian Desert also covers a vast reserve of underground groundwater that has been trapped beneath the sands since the Pleistocenic Age. In recnt years the underground reserve has been tapped and used for irrigration in the region. The groundwater, coupled with water reclaimed through desalinization, has allowed the Arabian Peninsula to be far more hospitable to modern populations than those of the past. Oil reserves have also been tapped in recent years, however, exportation of petroleum products from the region is often interrupted by internation crises like the Persian Gulf War.

Climate

Like most deserts, the Arabian Desert is classifed as a hyper arid climate. Climates of this type are distinguished by extrememly low annual rainfall and low humidity. Both of these distinguishing features are clearly seen in the Arabian Desert, which boasts an annual rainfall of under 33mm and less than 15% humidity in the summer.

While the overall dryness of the Arabian Desert is a formidable obstacle to human occupation, it is actually the extreme daily tempatures that mark the region as uninhabitable on a large scale. In the summer tempatures can reach a scorching (50 degrees Celcius) in the heat of the day and plummet to extreme cold during the night. In the winter it is not uncommon for night time tempatures to reach below freezing.

Wildlife

One of the most active forms of wildlife in the Arabian Desert are insects, who are able to survive in the sweltering heat of the sand dunes. Among the insects found in the region, the locust is often a cause of media attention. At one point the locust were considered a plague to the landscape, but has since been brought under control. Also making their home in the Arabian Desert, scavenging dung beetles, scorpions, and spiders play a vital role in the Desert ecosystem. Many of the insects that live within the region have developed a series of defensive mechanisms that allow them to avoid predators in the harsh climate. A prime example of this is the sting of the scorpions in the Arabian Desert, whose sting is potent enough to kill a small child.

Many varieties of lizards also can be found among the wildlife of the Arabian desert. One particular species, the dabb, is killed and roasted as a delicacy by the Bedouin. Other notable lizard varieties include the monitor lizard, which can reach an astonishing length of three feet. A close relative of the lizards, snakes also nest in the sands of the desert. Vipers are prominent among the snake population, as well as the sand cobra. However, due to the nocturnal nature of snakes, they do not often pose a large threat to human populations in the region.

At one point in the history of the Arabian desert, the region was home to a large mammal population. Despite the decline in herd populations, a few gazelles can still be found in wildlife preserves protected by the Saudi government. The few remaining gazelles are only a small part of the herds that used to roam the desert in abundance. As well as the gazelle population, the ibex population, a species of goat, has experienced a marked decline. However, the ibex population shows promise of returning to its former population after reintroduction to the wild from breeding in capitivity.

Much of the wildlife in the desert lives off the of the wide variety of plant life that can be found in the region. The plants that make the desert their home are, of necesity, adapted to the harm environment and inclimate weather. Most of the species are either able to survive on a very limited supply of water or are salt tolerant. Adaptations such as these allow the the desert sands to bloom with vegetation after the Spring rains. Despite native flowering plants like the daisy,mustard,iris, and caper plants, the desert cannot support enough vegetation to allow it to be used as a grazing ground. This was not always the case, as the region was often used as a pasture for nomadic herdsmen. Overgrazing, however, effectively diminished the capacity of the area to support a large grazing area.

In the oases of the Arabian Desert, date palms are often found in abundance. This fruit tree provides sustinene for both humans and livestock, preventing starvation in the harsh region. Also found in the oases are Juniper trees, a prominent building material for the area, alfalfa, onions, melons, barley, and wheat.

History

The area is home to several different peoples, languages and cultures, with Shi'a and Sunni Islam the predominant faiths.

The major ethnicities are:

• Arabs
• Kurds
• Turkmeni
• Assyrians

The significant languages are:

• Arabic
• Kurdish
• Aramaic
• Armenian

This ecoregion was the victim of a massive economic-environmental challenge: the sabotage of Kuwait oil facilities that caused vast oil spills and the release of toxins into the atmosphere in the 1990s.

In January 1991 during the Gulf War, Iraqi forces released about 1.7 million m³ (11 million barrels) of oil from storage tanks and tankers directly into the Persian Gulf. In February, they also destroyed 1,164 Kuwaiti oil wells. It took nine months to extinguish these oil fires. These oil spills contaminated 1000 km (600 miles) of Persian Gulf coast. The result of the pollution was the death of thousands of water birds and serious damage to the Persian Gulf's aquatic ecosystem, particularly shrimp, sea turtles, dugongs, whales, dolphins and fish. The damaged wells also released 10 million m³ (60 million barrels) of oil into the desert and formed lakes (total surface of 49 square kilometers) which contaminated soil and ground water.

Sources and Further Reading

• Allan, J. A., and Andrew Warren. 1993. Deserts: the encroaching wilderness : a world conservation atlas. New York: Oxford University Press. ISBN 0195209419 and ISBN 9780195209419
• Kelly, Kathleen, and R. T. Schnadelbach. 1976. Landscaping the Saudi Arabian desert. Philadelphia: Delancey Press.
• Dehau, Etienne, and Pierre Bonte. 2007. Bedouin and nomads: peoples of the Arabian desert. London: Thames & Hudson. ISBN 0500543348 and ISBN 9780500543344
• Lawrence, T. E. 1927. Revolt in the desert. New York: George H. Doran Co.
• Ben-ʻEzer, Ehud, and Uri Shulevitz. 1997. Hosni the dreamer: an Arabian tale. New York: Farrar Straus Giroux.
• Encyclopedia Britannica Retrieved October 22, 2007.

External Links

• Arabian Desert. Encyclopedia Britannica Online. Retrieved April 28, 2007.
• Desert. Fact Monster. Retrieved April 28, 2007.

ar:الصحراء العربية nl:Arabische Woestijn fi:Arabian niemimaan aavikot pl:Pustynia Arabska th:ทะเลทรายอาหรับ

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