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Lake Bonney (Antarctica)
Lake Bonney () is a saline water, saline lake with permanent ice cover at the western end of Taylor Valley in the McMurdo Dry Valleys of Victoria Land, Antarctica. It is long and up to wide. A narrow channel only wide (''Lake Bonney at Narrows'') separates the lake into ''East Lake Bonney'' () and ''West Lake Bonney'' (). To the north and south of the lake lie peaks that are over above sea level, and the Taylor Glacier is positioned to the west of the lake. It is deep and is perpetually trapped under of ice. It was first visited by the Discovery Expedition, British National Antarctic Expedition of 1901–1904. It was named by the Robert Falcon Scott Terra Nova Expedition, expedition of 1910–1913, for Thomas George Bonney, professor of geology at University College London, England from 1877 to 1901. Lake Bonney is one of the main lakes studied by the National Science Foundations, McMurdo Long Term Ecological Research Network, Long Term Ecological Research site. Starting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taylor Valley
Taylor Valley is an ice-free valley about long, once occupied by the receding Taylor Glacier. It lies north of the Kukri Hills between the Taylor Glacier and New Harbour in Victoria Land, Antarctica. Taylor Valley is the southernmost of the three large McMurdo Dry Valleys in the Transantarctic Mountains, located west of McMurdo Sound. Exploration and naming The Taylor Valley was discovered by the British National Antarctic Expedition (BrNAE, 1901–04). It was more fully explored by the British Antarctic Expedition, 1907–09 (BrAE) and the British Antarctic Expedition, 1910–13. It was named after the Taylor Glacier. Geology In the oblique aerial photo at right, the tan bands are sandstone layers from the Beacon Supergroup, a series of sedimentary rock layers formed at the bottom of a shallow sea between 250 million and 400 million years ago. Throughout that period, Earth's southern continents were locked into the supercontinent Gondwana. The dark band of rock th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Long Term Ecological Research Network
The Long Term Ecological Research (LTER) Network operated by the United States National Science Foundation (NSF) consists of a group of over 1800 scientists and students studying ecological processes over extended temporal and spatial scales. The Network represents the collection of individual research sites and the community of scientists that make up the US NSF LTER initiative. The Network is the operational entity where researchers at each site conduct long-term ecological research, share data, and collaborate on cross-site and synthesis projects. The Network is coordinated by a central office. Twenty-eight LTER sites cover a diverse set of ecosystem An ecosystem (or ecological system) is a system formed by Organism, organisms in interaction with their Biophysical environment, environment. The Biotic material, biotic and abiotic components are linked together through nutrient cycles and en ...s. It is part of the International Long Term Ecological Research Network (ILTER ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bohner Stream
Bohner Stream () is a meltwater stream, long, flowing north from the south end of Sollas Glacier to Priscu Stream in Taylor Valley, Victoria Land. It was named by the Advisory Committee on Antarctic Names in 1996 after Lieutenant Commander Robert T. (Beez) Bohner, U.S. Navy, helicopter pilot, Squadron VXE-6, who flew Antarctic missions from 1986; was liaison with the National Science Foundation, 1989–91; and organized the first spring (WINFLY) helicopter flights to McMurdo Dry Valleys The McMurdo Dry Valleys are a row of largely Antarctic oasis, snow-free valleys in Antarctica, located within Victoria Land west of McMurdo Sound. The Dry Valleys experience extremely low humidity and surrounding mountains prevent the flow of ... in 1991. References * Rivers of Victoria Land McMurdo Dry Valleys {{McMurdoDryValleys-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meltwater
Meltwater (or melt water) is water released by the melting of snow or ice, including glaciers, glacial ice, tabular icebergs and ice shelf, ice shelves over oceans. Meltwater is often found during early spring (season), spring when snow packs and cryosphere#Lake ice and river ice, frozen rivers melt with rising temperatures, and in the ablation zone of glaciers where the rate of snow cover is reducing. Meltwater can be produced during volcanic eruptions, in a similar way in which the more dangerous lahars form. It can also be produced by the heat generated by the flow itself. When meltwater pools on the surface rather than flowing, it forms melt ponds. As the weather gets colder meltwater will often re-freeze. Meltwater can also collect or melt under the ice's surface. These pools of water, known as subglacial lakes can form due to geothermal heat and friction. Melt ponds may also form above and below Arctic sea ice, decreasing its albedo and causing the formation of thin underw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlamydomonas Priscuii
''Chlamydomonas'' ( ) is a genus of green algae consisting of about 150 species of unicellular flagellates, found in stagnant water and on damp soil, in freshwater, seawater, and even in snow as " snow algae". ''Chlamydomonas'' is used as a model organism for molecular biology, especially studies of flagellar motility and chloroplast dynamics, biogenesis, and genetics. One of the many striking features of ''Chlamydomonas'' is that it contains ion channels (channelrhodopsins) that are directly activated by light. Some regulatory systems of ''Chlamydomonas'' are more complex than their homologs in Gymnosperms, with evolutionarily related regulatory proteins being larger and containing additional domains. Molecular phylogeny studies indicated that the traditional genus ''Chlamydomonas'' as defined using morphological data, was polyphyletic within Volvocales. Many species were subsequently reclassified (e.g., ''Oogamochlamys, Lobochlamys''), and many other "''Chlamydomonas''" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europa (moon)
Europa () is a moons of Jupiter, natural satellite (moon) of Jupiter. Being observable from Earth with common binoculars it is one of the four Galilean moons. As such it is a planetary-mass moon, the smallest and least massive orbiting Jupiter, and slightly smaller and less massive than Moon, Earth's. Europa is an icy moon, being of the three icy Galilean moons the closest orbiting Jupiter. As a result it is exhibiting a relatively young surface, driven by tidal heating. Probably having an iron–nickel alloy, iron–nickel core, it consists mainly of silicate rock, with a water-ice shell. It has a very thin atmosphere, composed primarily of oxygen. Its geologically young white-beige surface is Glacial striation, striated by light Tan (color), tan cracks and streaks, with very few impact craters. In addition to Earth-bound telescope observations, Europa has been examined by a succession of space-probe flybys, the first occurring in the early 1970s. In September 2022, the Juno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jupiter
Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a Jupiter mass, mass more than 2.5 times that of all the other planets in the Solar System combined and slightly less than one-thousandth the mass of the Sun. Its diameter is 11 times that of Earth and a tenth that of the Sun. Jupiter orbits the Sun at a distance of , with an orbital period of . It is the List of brightest natural objects in the sky, third-brightest natural object in the Earth's night sky, after the Moon and Venus, and has been observed since prehistoric times. Its name derives from that of Jupiter (god), Jupiter, the chief deity of ancient Roman religion. Jupiter was the first of the Sun's planets to form, and its inward migration during the primordial phase of the Solar System affected much of the formation history of the other planets. Jupiter's atmosphere consists of 76% hydrogen and 24% helium by mass, with a denser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecosystem
An ecosystem (or ecological system) is a system formed by Organism, organisms in interaction with their Biophysical environment, environment. The Biotic material, biotic and abiotic components are linked together through nutrient cycles and energy flows. Ecosystems are controlled by external and internal Environmental factor, factors. External factors—including climate—control the ecosystem's structure, but are not influenced by it. By contrast, internal factors control and are controlled by ecosystem processes; these include decomposition, the types of species present, root competition, shading, disturbance, and succession. While external factors generally determine which Resource (biology), resource inputs an ecosystem has, their availability within the ecosystem is controlled by internal factors. Ecosystems are wikt:dynamic, dynamic, subject to periodic disturbances and always in the process of recovering from past disturbances. The tendency of an ecosystem to remain clo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Charles Priscu
John C. Priscu (; born 20 September 1952, Las Vegas, Nevada), is a Romanian-American scientist who is the current Professor of Ecology in the Department of Land Resources and Environmental Sciences at Montana State University. He is a principal investigator in the McMurdo Dry Valleys The McMurdo Dry Valleys are a row of largely Antarctic oasis, snow-free valleys in Antarctica, located within Victoria Land west of McMurdo Sound. The Dry Valleys experience extremely low humidity and surrounding mountains prevent the flow of ... Long Term Ecological Research (LTER) project. Filmography/TV appearances He appeared on documentary program ''Horizon'' in the episode "The Lost World of Lake Vostok". References External linksJohn Charles Priscu''Montana State University'' See also * Jill Mikucki American people of Romanian descent 1952 births Living people Scientists from Las Vegas American Antarctic scientists American scientists {{US-scientist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bill Stone (caver)
William C. Stone (born December 7, 1952) is an American engineer, caver and explorer, known for exploring deep caves, sometimes with autonomous underwater vehicles. He has participated in over 40 international expeditions and is president and CEO of Stone Aerospace. Biography Stone was born on December 7, 1952, in Pennsylvania. He was an active caver in the Rensselaer Polytechnic Institute's Outing Club while studying for a B.S. in Civil Engineering, awarded in 1974. In 1976, while studying engineering at the University of Texas at Austin, Stone took part in an expedition to the Sistema Huautla in Oaxaca, Mexico, where his group set a new penetration depth record of . After obtaining a Ph.D. in engineering, Stone worked at the National Institute of Standards and Technology in Gaithersburg, Maryland from 1980 to 2004. While at the institute, Stone established the Construction Metrology and Automation Group. He led the group for seven years before stepping down to focus on proje ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Doran
Peter T. Doran is an American Earth scientist who is Professor of Geology and Geophysics and John Franks Endowed Chair at Louisiana State University. Prior to 2015, he was faculty in Earth and Environmental Sciences at the University of Illinois at Chicago. Doran specializes in polar regions, especially Antarctic climate and ecosystems. Doran was the lead author of a research paper about Antarctic temperatures that was published in the journal ''Nature'' in January 2002. Because he and his colleagues found that some parts of Antarctica had cooled between 1964 and 2000, his paper has been frequently cited by opponents of the global warming theory, such as Ann Coulter and Michael Crichton. In an opinion piece in the July 27, 2006 ''New York Times'', Doran characterized this as a "misinterpretation" and stated, "I have never thought such a thing ... I would like to remove my name from the list of scientists who dispute global warming." (The temporary phenomenon is related to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DEPTHX
The Deep Phreatic Thermal Explorer (DEPTHX) is an autonomous underwater vehicle designed and built by Stone Aerospace, an aerospace engineering firm based in Austin, Texas. It was designed to autonomously explore and map underwater sinkholes in northern Mexico, as well as collect water and wall core samples. This could be achieved via an autonomous form of navigation known as A-Navigation. The DEPTHX vehicle was the first of three vehicles to be built by Stone Aerospace which were funded by NASA with the goal of developing technology that can explore the oceans of Jupiter's moon Europa to look for extraterrestrial life. DEPTHX was a collaborative project for which Stone Aerospace was the principal investigator. Co-investigators included Carnegie Mellon University, which was responsible for the navigation and guidance software, the Southwest Research Institute, which built the vehicle's science payload, and research scientists from the University of Texas at Austin, the Colorad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
