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Antarctic Lakes
There are hundreds of antarctic lakes in Antarctica. In 2018 researchers at the Alfred Wegener Institute for Polar and Marine Research published a study they claimed cast doubt on the earlier estimate that there were almost 400 subglacial antarctic lakes. Antarctica also has some relatively small regions that are clear of ice and snow, and there are some surface lakes in these regions. They called for on the ground seismic studies, or drilling, to determine a more reliable number. These lakes are buried beneath deep layers of glacial ice. When a glacier is very thick, the pressure at the bottom is great enough that liquid water can exist at temperatures where water would freeze, at regular pressures. The ice above Lake Vostok, the largest antarctic lake, is approximately thick. Scientists studying the lakes, by careful drilling and water sampling, suggest conditions there may resemble the oceans believed to exist on planet Jupiter's moon Europa. Selected Antarctic lakes Refe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subglacial Lake
A subglacial lake is a lake that is found under a glacier, typically beneath an ice cap or ice sheet. Subglacial lakes form at the boundary between ice and the underlying bedrock, where gravitational pressure decreases the pressure melting point of ice. Over time, the overlying ice gradually melts at a rate of a few millimeters per year. Meltwater flows from regions of high to low hydraulic pressure under the ice and pools, creating a body of liquid water that can be isolated from the external environment for millions of years. Since the first discoveries of subglacial lakes under the Antarctic Ice Sheet, more than 400 subglacial lakes have been discovered in Antarctica, beneath the Greenland Ice Sheet, and under Iceland's Vatnajökull ice cap. Subglacial lakes contain a substantial proportion of Earth's liquid freshwater, with the volume of Antarctic subglacial lakes alone estimated to be about 10,000 km3, or about 15% of all liquid freshwater on Earth. As ecosystems is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of . Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of . Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost . Antarctica holds the record for the lowest measured temperature on Earth, . The coastal regions can reach temperatures over in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where vegetation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Burton (Antarctica)
Lake Burton, also known as Burton Lagoon, is a meromictic and saline lake in the Vestfold Hills of Princess Elizabeth Land in Eastern Antarctica. Princess Elizabeth Land, including the lake, is claimed by Australia as part of the Australian Antarctic Territory. The lake has a surface area of , a volume of 9.69 million m3, a maximum depth of and a mean depth of . The lake is named after H. R. Burton, a biologist working in the Vestfold Hills of Antarctica. The lake is covered with ice for 10–11 months in a year. A tidal channel links the lake with Crooked Fjord only seasonally for about 6–7 months in the year. The tidal channel has a width of and is about deep. Lake Burton is the only meromictic lagoon that is part of the Antarctic Specially Protected Area No. 143, within East Antarctica, and access to the lake can only legally be obtained by a special permit and adhering to some strict regulations. A diatom floristic study of the lagoon revealed that it contains 41 spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Scientist Magazine
''New Scientist'' is a magazine covering all aspects of science and technology. Based in London, it publishes weekly English-language editions in the United Kingdom, the United States and Australia. An editorially separate organisation publishes a monthly Dutch-language edition. First published on 22 November 1956, ''New Scientist'' has been available in online form since 1996. Sold in retail outlets (paper edition) and on subscription (paper and/or online), the magazine covers news, features, reviews and commentary on science, technology and their implications. ''New Scientist'' also publishes speculative articles, ranging from the technical to the philosophical. ''New Scientist'' was acquired by Daily Mail and General Trust (DMGT) in March 2021. History Ownership The magazine was founded in 1956 by Tom Margerison, Max Raison and Nicholas Harrison as ''The New Scientist'', with Issue 1 on 22 November 1956, priced at one shilling (a twentieth of a pound in pre-decimal UK cur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nature (journal)
''Nature'' is a British weekly scientific journal founded and based in London, England. As a multidisciplinary publication, ''Nature'' features peer-reviewed research from a variety of academic disciplines, mainly in science and technology. It has core editorial offices across the United States, continental Europe, and Asia under the international scientific publishing company Springer Nature. ''Nature'' was one of the world's most cited scientific journals by the Science Edition of the 2019 ''Journal Citation Reports'' (with an ascribed impact factor of 42.778), making it one of the world's most-read and most prestigious academic journals. , it claimed an online readership of about three million unique readers per month. Founded in autumn 1869, ''Nature'' was first circulated by Norman Lockyer and Alexander Macmillan as a public forum for scientific innovations. The mid-20th century facilitated an editorial expansion for the journal; ''Nature'' redoubled its efforts in exp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctic And Southern Ocean Coalition
The Antarctic and Southern Ocean Coalition (ASOC) is a global coalition of environmental non-governmental organizations with more than 150 members in 40 countries worldwide. ASOC has worked since 1978 to ensure that the Antarctic Continent, its surrounding islands and the great Southern Ocean survive as the world's last unspoiled wilderness, a global commons for the heritage of future generations. ASOC is supported entirely through donations from individual supporters around the world, dues from its members and grants from foundations. The Secretariat of the Antarctic and Southern Ocean Coalition (ASOC), which includes 150 organizations in 40 countries, is based in Washington, D.C. The ASOC Council includes member groups that have paid dues or provided significant in-kind services to the ASOC campaign team. Campaign ASOC aims to advocate on behalf of the Antarctic environment and ecosystems. Major campaigns include the Antarctic Krill Conservation Project, which works to prot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Glaciology
A journal, from the Old French ''journal'' (meaning "daily"), may refer to: *Bullet journal, a method of personal organization *Diary, a record of what happened over the course of a day or other period *Daybook, also known as a general journal, a daily record of financial transactions *Logbook, a record of events important to the operation of a vehicle, facility, or otherwise *Record (other) *Transaction log, a chronological record of data processing *Travel journal In publishing, ''journal'' can refer to various periodicals or serial (publishing), serials: *Academic journal, an academic or scholarly periodical **Scientific journal, an academic journal focusing on science **Medical journal, an academic journal focusing on medicine **Law review, a professional journal focusing on legal interpretation *Magazine, non-academic or scholarly periodicals in general **Trade magazine, a magazine of interest to those of a particular profession or trade **Literary magazine, a magazin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Whillans
Lake Whillans is a subglacial lake in Antarctica. The lake is located under the Whillans Ice Stream at the southeastern edge of the Ross Ice Shelf in the west of the continent. The lake surface is beneath the surface of the ice and the lake covers an estimated area of . Lake depths measured thus far have been around . Its temperature is −0.49 °C, below 0 °C because of the high pressure. Lake Whillans, like the Whillans Ice Stream, is named for Ohio State University glaciologist Dr. Ian Whillans. Discovery The lake was first described in 2007 by Helen Fricker, a glaciologist at the Scripps Institution of Oceanography. Satellite laser altimeter data from NASA's ICESat had revealed the ice at that location rising and falling, leading her team to conclude the presence of the lake. Research On 28 January 2013, the Whillans Ice Stream Subglacial Access Research Drilling (WISSARD) team announced that they had reached the lake surface having drilled through the ice a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pensacola Mountains
The Pensacola Mountains are a large group of mountain ranges of the Transantarctic Mountains System, located in the Queen Elizabeth Land region of Antarctica. Geography They extend 450 km (280 mi) in a NE-SW direction. Subranges of the Pensacola Mountains include: Argentina Range, Forrestal Range, Dufek Massif, Cordiner Peaks, Neptune Range, Patuxent Range, Rambo Nunataks and Pecora Escarpment. These mountain units lie astride the extensive Foundation Ice Stream and Support Force Glacier which drain northward to the Ronne Ice Shelf. ;Naming Discovered and photographed on 13 January 1956 in the course of a transcontinental nonstop plane flight by personnel of United States Navy Operation Deep Freeze I from McMurdo Sound to Weddell Sea and return. Named by US-ACAN for the U.S. Naval Air Station, Pensacola, Florida, in commemoration of the historic role of that establishment in training aviators of the U.S. Navy. The mountains were mapped in detail by USGS from surveys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forlidas Pond
Forlidas Pond is a round frozen pond, in diameter, lying in a morainal valley east of the north end of Forlidas Ridge, Dufek Massif, Queen Elizabeth Land, Antarctica. The only pond in the northern Pensacola Mountains, it is of much interest to biologists. The pond was discovered and briefly investigated in December 1957 by a United States – International Geophysical Year party from Ellsworth Station. The name is in association with Forlidas Ridge and was suggested by Arthur B. Ford of the United States Geological Survey following geological work in the area, 1978–79. Antarctic Specially Protected Area Forlidas Pond, with Davis Valley some away, and other adjacent ice-free valleys, forms one of the most southerly ‘dry valley’ systems on the continent and has exceptional scientific value for the interpretation of past glacial events and climate in this part of Antarctica. The site is protected under the Antarctic Treaty System as Antarctic Specially Protected Area An Antar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Ellsworth (Antarctica)
Lake Ellsworth is a natural freshwater liquid subglacial lake located in West Antarctica under approximately of ice. It is approximately 10 km long and is estimated to be in depth. The lake is named after the American explorer Lincoln Ellsworth. The surface of the lake itself is located over below sea level. Exploration Lake Ellsworth was discovered in 1996 by British scientist Professor Martin Siegert of the University of Bristol; it is one of 387 known subglacial Antarctic lakes and it is a target site for exploration due to the speculation that new forms of microbial life could have evolved in the unique habitats of Antarctica’s sub-glacial lakes after half a million years of isolation.Siegert, Martin J. and the Lake Ellsworth Consortium, "Exploration of Subglacial Lake Ellsworth", Poster, University of Bristol, September 2004 Life in subglacial lakes would have to adapt to total darkness, low nutrient levels, high water pressure, and isolation from the atmosphere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concordia Subglacial Lake
Concordia Subglacial Lake is a subglacial lake located beneath an ice sheet thick. It has a surface of about and is deep. The surface of the water has an elevation from below the sea level. It was first located in December 1999; the name derives from the nearby French-Italian Concordia Research Station Concordia Research Station, which opened in 2005, is a French–Italian research facility that was built above sea level at a location called Dome C on the Antarctic Plateau, Antarctica. It is located inland from the French research station a .... References * Lakes of Antarctica Bodies of water of Wilkes Land {{WilkesLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
