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1) Antarctic Desert :[br][br]In terms of sheer size, the Antarctic Desert is the largest desert on Earth, measuring a total of 13.8 million square kilometres. Antarctica, the southernmost continent and site of the South Pole, is a virtually uninhabited, ice-covered landmass. Antarctica is the coldest, windiest and most isolated continent on Earth and is considered a desert because its annual precipitation can be less than 51 mm in the interior. It's covered by a permanent ice sheet that contains 90% of the Earth's fresh water. Very little snow or rain falls on the continent. There are no permanent human residents. But up to 1,000 people may be wintering over at various research stations. In fact, the coldest temperature ever recorded was taken at the Soviet Vostok Station on the Antarctic Plateau. The ice can be more than 4 km thick in some places. Using ground-based measurements, the temperature reached a historic low of -89.2°C on July 21,1983.[br][br]
[br] Third party image reference[br][br]2) Arctic Desert :[br][br]The Arctic Desert ecoregion is a terrestrial that covers the island groups of Svalbard, Franz Josef Land, Severny Island and Severnaya Zemlya in the Arctic Ocean, above 75 degrees north latitude. The islands are covered with glaciers, snow and bare rock in a harshly cold environment. The temperature does rise above freezing for short periods in the summer. It has an area of 161, 356 square kilometres. The Arctic is a cold desert because it gets very little precipitation about the same amount as the Sahara. The region has a Tundra. This climate is characterized by long, cold winters and very short summers with at least one month averaging 0°C so tat snow or ice might melt. Temperature as low as -70°C have been recorded in northern Greenland.[br][br]
[br] Third party image reference[br][br]3) Sahara Desert :[br][br]The Sahara is a desert located on the African continent. It is the largest hot desert in the world and the third largest desert overall after Antarctica and the Arctic. Its area of 9,200,000 square kilometres is comparable to the area of China or United States. The name 'Sahara' is derived from a dialectal Arabic word for "desert", sahra. The area is next expected to become green in about 15,000 years. The Sahara covers large parts of Algeria, Chad, Egypt, Libya, Mali, Niger, Western Sahara and Sudan. It covers 9 million square kilometres, amounting 30% of Africa. It is one of three distinct physio graphic provinces of the African massive physio graphic division. The Sahara is the world's largest low-attitude hot desert. Most of the desert has more than 3600 hours of bright sunshine per year. In terms of rainfall, about half of the Sahara receives less than 0.79 inches of rain a year.[br][br]
[br] Third party image reference[br][br]4) Arabian Desert :[br][br]The Arabian Desert is a vast desert wilderness in Western Asia. It stretches from Yemen to the Persian Gulf and Oman to Jordan and Iraq. It occupies most of the Arabian Peninsula, with an area of 2,330,000 square kilometres. It is the fifth largest desert in the world and the largest in Asia. At its center is Ar-Rub'al-Khali, one of the largest continuous bodies of sand in the world. The climate is mostly dry around 100 mm and temperatures oscillate between very high heat and seasonal night time freezes. Some of natural resources available in the Arabian Desert are oil, natural gas, phosphates and sulfur. The sunshine duration is very high by global standards in the Arabian Desert, between 2,900 hours and 3,600 hours. The desert rose is one of the most famous and date palms are abundant and a useful source of food.[br][br]
[br] Third party image reference[br][br]5) Gobi Desert :[br][br]The Gobi Desert is a vast, arid region in northern China and southern Mongolia. It's known for its dunes, mountains and rare animals such as snow leopards and Bactrian camels. In the Gobi, Gurvansaikhan National Park. The park also features the deep ice field of Yolyn Am canyon. The Gobi is notable in history as part of the great Mongol Empire and as the location of several important cities along the Silk Road. Dinosaur fossils have been found at the red "Flaming Cliffs" of Bayanzag. The Gobi measures over 1600 km from southwest to northeast and 800 km from north to south. Much of the Gobi is not sandy but has exposed bare rock. The Gobi is overall a cold desert, with frost and occasionally snow occurring on its dunes.[br][br]
[br] Third party image reference[br][br][br][br][br]source. : TecH[br] |
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发表于 2019-05-07 03:44:36
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