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Retrogressive Thaw Slumps
Retrogressive thaw slumps (RTS), are a type of landslide that occur in the terrestrial Arctic's permafrost region of the circumpolar Northern Hemisphere when an ice-rich section thaws. RTSs develop quickly and can extend across several hectares modifying Arctic coastlines and permafrost terrain. They are the most active and dynamic feature of thermokarstthe collapse of the land surface as ground ice melts. They are thermokarst slope failures due to abrupt thawing of ice-rich permafrost or glaciated terrains. These horseshoe-shaped landslides contribute to the thawing of hectares of permafrost annually and are considered to be one of the most active and dynamic features of thermokarstthe "processes and landforms that involve collapse of the land surface as a result of the melting of ground ice." They are found in permafrost or glaciated regions of the Northern Hemispherethe Tibetan Plateau, Siberia, from the Himalayas to northern Greenland, and in northern Canada's Northwest Territo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Hemisphere
The Northern Hemisphere is the half of Earth that is north of the Equator. For other planets in the Solar System, north is defined as being in the same celestial hemisphere relative to the invariable plane of the solar system as Earth's North Pole. Owing to Earth's axial tilt of 23.439281°, winter in the Northern Hemisphere lasts from the December solstice (typically December 21 UTC) to the March equinox (typically March 20 UTC), while summer lasts from the June solstice through to the September equinox (typically on 23 September UTC). The dates vary each year due to the difference between the calendar year and the astronomical year. Within the Northern Hemisphere, oceanic currents can change the weather patterns that affect many factors within the north coast. Such events include El Niño–Southern Oscillation. Trade winds blow from east to west just above the equator. The winds pull surface water with them, creating currents, which flow westward due to the Coriolis e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yedoma
Yedoma (russian: едома) is an organic-rich (about 2% carbon by mass) Pleistocene-age permafrost with ice content of 50–90% by volume. Yedoma are abundant in the cold regions of eastern Siberia, such as northern Yakutia, as well as in Alaska and the Yukon. Characteristics The landscape of Yedoma areas is of glacier plains and hills with shallow depressions known as alas. Yedoma usually form in lowlands or stretches of land with rolling hills where ice wedge polygonal networks are present, in stable relief features with accumulation zones of poor drainage, severe cold and arid continental climate zones resulting in scanty vegetation cover, intense periglacial weathering processes, as well as the proximity of sediment sources, such as low mountain ranges and foothills. The amount of carbon trapped in this type of permafrost is much more prevalent than originally thought and may be about 210 to 500 Gt, that is a multiple of the amount of carbon released into the air each ye ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qinghai–Tibet Highway
China National Highway 109 connects Beijing with Lhasa. It runs westwards from Beijing via Datong, Yinchuan and Xining to Golmud before turning southwest to Lhasa. The portion of the highway from Xining to Lhasa is known as the Qinghai-Tibet Highway. The total length of the route is 3,901 km. Fushi Road or Jinglan Road forms the stretch of G109 in Beijing, as it begins from Fuchengmen and traverses through Shijingshan. The majority of the Beijing section is in Mentougou District. The section of the highway within western Qinghai and Tibet, from Golmud to Lhasa, is paralleled by the Qinghai-Tibet Railway. The highway reaches its highest elevation of at Tanggula Pass. Construction of this section started on 11 May 1954. "Tasked with carrying upwards of 85 per cent of goods in and out of Tibet, the Qinghai-Tibet Highway has been dubbed the "Lifeline of Tibet." ... Since it was opened to traffic in 1954, the central government has spent nearly 3 billion yuan (US$362 millio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tibet Autonomous Region
The Tibet Autonomous Region or Xizang Autonomous Region, often shortened to Tibet or Xizang, is a Provinces of China, province-level Autonomous regions of China, autonomous region of the China, People's Republic of China in Southwest China. It was overlayed on the traditional Tibetan regions of Ü-Tsang and Kham. It was formally established in 1965 to replace the Tibet Area (administrative division), Tibet Area, the former Administrative divisions of China, administrative division of the People's Republic of China (PRC) established after the annexation of Tibet by the People's Republic of China, annexation of Tibet. The establishment was about five years after the 1959 Tibetan uprising and the dismissal of the Kashag, and about 13 years after the original annexation. The current borders of the Tibet Autonomous Region were generally established in the 18th century and include about half of historic Tibet, or the Tibet, ethno-cultural Tibet. The Tibet Autonomous Region spans ov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golmud
Golmud, also known by various other romanizations, is a county-level city in the Haixi Mongol and Tibetan Autonomous Prefecture of Qinghai Province, China. It is now the second-largest city in Qinghai and the third largest in the Tibetan Plateau (after Xining and Lhasa). The population in 2020 is 221,863. Name ''Golmud'' is a romanization of a Mongolian word meaning "rivers". ''Ge'ermu'' is the pinyin romanization of the Mandarin pronunciation of the same name's transcription into Chinese characters; it is sometimes misspelled ''Geermu''. ''Ko-erh-mu'' was the same name romanized using the Wade–Giles system; ''Golmot'' was the romanization used by the Chinese Postal Map. The Wylie romanization of the Tibetan form of the name is ''Nagormo''. Geography Golmud is part of Haixi Prefecture in western Qinghai Province. Despite being nominally a "city", the built-up urban area of Golmud comprises only of the county's . Most of the county lies in the southern Qaidam Basin and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lhasa
Lhasa (; Lhasa dialect: ; bo, text=ལྷ་ས, translation=Place of Gods) is the urban center of the prefecture-level city, prefecture-level Lhasa (prefecture-level city), Lhasa City and the administrative capital of Tibet Autonomous Region in Southwest China. The inner urban area of Lhasa City is equivalent to the administrative borders of Chengguan District (), which is part of the wider prefectural Lhasa City. Lhasa is the second most populous urban area on the Tibetan Plateau after Xining and, at an altitude of , Lhasa is one of the List of highest large cities, highest cities in the world. The city has been the religious and administrative capital of Tibet since the mid-17th century. It contains many culturally significant Tibetan Buddhism, Tibetan Buddhist sites such as the Potala Palace, Jokhang Temple and Norbulingka Palaces. Toponymy Lhasa literally translates to "place of gods" ( , god; , place) in the Standard Tibetan, Tibetan language. Chengguan literally tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richardson Mountains
The Richardson Mountains are a mountain range located west of the mouth of the Mackenzie River in northern Yukon, Canada. They parallel the northernmost part of the boundary between Yukon and Northwest Territories. Although some sources consider the Richardson Mountains to be part of the Canadian Rockies, the common northern limit of the Canadian Rockies is the Liard River, which is a long way south. The Richardson Mountains are a sub-range of the Brooks Range which lies mostly in Alaska. See also * List of mountain ranges of Canada *Albert Johnson (criminal) Albert Johnson ( – February 17, 1932), also known as the Mad Trapper of Rat River, was a fugitive whose actions stemming from a trapping dispute eventually sparked a huge manhunt in the Northwest Territories and Yukon in Northern Canada. ... References Mountain ranges of Yukon Brooks Range {{Yukon-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laurentide Ice Sheet
The Laurentide Ice Sheet was a massive sheet of ice that covered millions of square miles, including most of Canada and a large portion of the Northern United States, multiple times during the Quaternary glacial epochs, from 2.58 million years ago to the present. The last advance covered most of northern North America between c. 95,000 and c. 20,000 years before the present day and, among other geomorphological effects, gouged out the five Great Lakes and the hosts of smaller lakes of the Canadian Shield. These lakes extend from the eastern Northwest Territories, through most of northern Canada, and the upper Midwestern United States (Minnesota, Wisconsin, and Michigan) to the Finger Lakes, through Lake Champlain and Lake George areas of New York, across the northern Appalachians into and through all of New England and Nova Scotia. At times, the ice sheet's southern margin included the present-day sites of coastal towns of the Northeastern United States, and cities such as Bos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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