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Zavodovski Island
Zavodovski Island is an uninhabited volcanic island in the Traversay Islands subgroup of the South Sandwich Islands. It lies southeast of South Georgia Island. It is the northernmost of the South Sandwich Islands and the nearest to South Georgia. The island is home to around a million pairs of breeding chinstrap penguins, which is the largest number of penguins found anywhere besides Antarctica. History Zavodovski Island was discovered and named by Russian Antarctic explorer Fabian Gottlieb von Bellingshausen on December 23, 1819. Bellingshausen named it after Captain-Lieutenant , who was captain of his ship, the Imperial Russian Navy sloop-of-war ''Vostok''. A group of three members of the expedition, Captain-Lieutenant Ivan Zavadovskiy, astronomer Prof. Ivan Simonov, and Lieutenant Dmitriy Demidov, landed on the island on December 24, 1820 and collected speciments of volcanic rocks, and caught some birds and penguins. The American schooner ''Pacific'' under Captain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Ocean
The Southern Ocean, also known as the Antarctic Ocean, comprises the southernmost waters of the World Ocean, generally taken to be south of 60° S latitude and encircling Antarctica. With a size of , it is regarded as the second-smallest of the five principal oceanic divisions: smaller than the Pacific, Atlantic, and Indian oceans but larger than the Arctic Ocean. Over the past 30 years, the Southern Ocean has been subject to rapid climate change, which has led to changes in the marine ecosystem. By way of his voyages in the 1770s, James Cook proved that waters encompassed the southern latitudes of the globe. Since then, geographers have disagreed on the Southern Ocean's northern boundary or even existence, considering the waters as various parts of the Pacific, Atlantic, and Indian oceans, instead. However, according to Commodore John Leech of the International Hydrographic Organization (IHO), recent oceanographic research has discovered the importance of Southern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ivan Mikhailovich Simonov
Ivan Mikhailovich Simonov (1794–1855) was a Russian astronomer and a geodesist. Biography He completed his studies and became a professor of physics at Kazan State University in 1816 where he was a close friend of Nikolai Lobachevsky. He was a corresponding member of the Russian Academy of Sciences, Saint Petersburg Academy of Sciences from 1829 and later went on to become the rector of Kazan State University in 1846. From 1819 to 1821 he took part in and wrote a detailed account of F. F. Bellingshausen and M. P. Lazarev’s expedition around the world, during which the continent of Antarctica was discovered. Among Simonov’s contributions are his many astronomical observations, the development of methods for such observations, and the design of a reflector. Simonov was among the first in Russia to study terrestrial magnetism. On his initiative two observatories were established in Kazan: an astronomical observatory in 1833 and an observatory for the study of magnetism in 1843. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Geophysical Union
The American Geophysical Union (AGU) is a 501(c)(3) nonprofit organization of Earth, atmospheric, ocean, hydrologic, space, and planetary scientists and enthusiasts that according to their website includes 130,000 people (not members). AGU's activities are focused on the organization and dissemination of scientific information in the interdisciplinary and international fields within the Earth and space sciences. The geophysical sciences involve four fundamental areas: atmospheric and ocean sciences; solid-Earth sciences; hydrologic sciences; and space sciences. The organization's headquarters is located on Florida Avenue in Washington, D.C. History The AGU was established in December 1919 by the National Research Council (NRC) to represent the United States in the International Union of Geodesy and Geophysics (IUGG), and its first chairman was William Bowie of the United States Coast and Geodetic Survey (USCGS). For more than 50 years, it operated as an unincorporated affili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Volcanoes In South Sandwich Islands
This is a list of active and extinct volcanoes in the South Sandwich Islands. References {{DEFAULTSORT:Volcanoes in South Sandwich Islands South Sandwich Islands ) , anthem = "God Save the King" , song_type = , song = , image_map = South Georgia and the South Sandwich Islands in United Kingdom.svg , map_caption = Location of South Georgia and the South Sandwich Islands in the southern Atlantic Oce ... South Georgia and the South Sandwich Islands-related lists * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tephra
Tephra is fragmental material produced by a volcanic eruption regardless of composition, fragment size, or emplacement mechanism. Volcanologists also refer to airborne fragments as pyroclasts. Once clasts have fallen to the ground, they remain as tephra unless hot enough to fuse into pyroclastic rock or tuff. Tephrochronology is a geochronological technique that uses discrete layers of tephra—volcanic ash from a single eruption—to create a chronological framework in which paleoenvironmental or archaeological records can be placed. When a volcano explodes, it releases a variety of tephra including ash, cinders, and blocks. These layers settle on the land and, over time, sedimentation occurs incorporating these tephra layers into the geologic record. Often, when a volcano explodes, biological organisms are killed and their remains are buried within the tephra layer. These fossils are later dated by scientists to determine the age of the fossil and its place within the geolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava
Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at temperatures from . The volcanic rock resulting from subsequent cooling is also often called ''lava''. A lava flow is an outpouring of lava during an effusive eruption. (An explosive eruption, by contrast, produces a mixture of volcanic ash and other fragments called tephra, not lava flows.) The viscosity of most lava is about that of ketchup, roughly 10,000 to 100,000 times that of water. Even so, lava can flow great distances before cooling causes it to solidify, because lava exposed to air quickly develops a solid crust that insulates the remaining liquid lava, helping to keep it hot and inviscid enough to continue flowing. The word ''lava'' comes from Italian and is probably derived from the Latin word ''labes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stratovolcano
A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and periodic intervals of explosive eruptions and effusive eruptions, although some have collapsed summit craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far, due to high viscosity. The magma forming this lava is often felsic, having high-to-intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less-viscous mafic magma. Extensive felsic lava flows are uncommon, but have travelled as far as . Stratovolcanoes are sometimes called composite volcanoes because of their composite stratified structure, built up from sequential outpourings of erupted materials. They are among the most common types of volcanoes, in contrast to the less common shield volca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Kingdom Antarctic Place-Names Committee
The UK Antarctic Place-Names Committee (or UK-APC) is a United Kingdom government committee, part of the Foreign and Commonwealth Office, responsible for recommending names of geographical locations within the British Antarctic Territory (BAT) and the South Georgia and the South Sandwich Islands (SGSSI). Such names are formally approved by the Commissioners of the BAT and SGSSI respectively, and published in the BAT Gazetteer and the SGSSI Gazetteer maintained by the Committee. The BAT names are also published in the international Composite Gazetteer of Antarctica maintained by SCAR. The Committee may also consider proposals for new place names for geographical features in areas of Antarctica outside BAT and SGSSI, which are referred to other Antarctic place-naming authorities, or decided by the Committee itself if situated in the unclaimed sector of Antarctica. Names attributed by the committee * Anvil Crag, named for descriptive features * Anckorn Nunataks, named after J. F. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unglaciated
A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as crevasses and seracs, as it slowly flows and deforms under stresses induced by its weight. As it moves, it abrades rock and debris from its substrate to create landforms such as cirques, moraines, or fjords. Although a glacier may flow into a body of water, it forms only on land and is distinct from the much thinner sea ice and lake ice that form on the surface of bodies of water. On Earth, 99% of glacial ice is contained within vast ice sheets (also known as "continental glaciers") in the polar regions, but glaciers may be found in mountain ranges on every continent other than the Australian mainland, including Oceania's high-latitude oceanic island countries such as New Zealand. Between latitudes 35°N and 35°S, glaciers occur only in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plume From Zavodovski Volcano (7128666611)
Plume or plumes may refer to: Science * Plume (feather), a prominent bird feather * Plume (fluid dynamics), a column consisting of one fluid moving through another fluid * Eruption plume, a column of volcanic ash and gas emitted into the atmosphere during an eruption * Mantle plume, an upwelling of hot rock within the Earth's mantle that can cause volcanic hotspots * Moisture plume, an alternative name for a atmospheric river, a narrow corridor of concentrated moisture in the atmosphere * Plumage, the layer of feathers that cover a bird Media and literature * "Plume" (Air episode), a 2005 episode of the Japanese anime ''Air'' * '' Plume'', a 2006 album by Loscil * ''Plumes'' (play), a 1927 one-act play by Georgia Douglas Johnson * ''Plume'' (poetry collection), a 2012 book by Kathleen Flenniken * Plume (publisher), an American book publishing company * ''Plumes'', a 1924 novel by Laurence Stallings * A song by The Smashing Pumpkins on their 1994 album ''Pisces Iscariot'' * " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planet Earth II
''Planet Earth II'' is a 2016 British nature documentary series produced by the BBC as a sequel to ''Planet Earth'', which was broadcast in 2006. The series is presented and narrated by Sir David Attenborough with the main theme music composed by Hans Zimmer. Announced in 2013, ''Planet Earth II'' is the first television series produced by the BBC in Ultra-high-definition (4K), and set out to utilise new filmmaking technologies that had been developed since the first series. The first trailer was released on 9 October 2016, and the series premiered on 6 November 2016 in the United Kingdom on BBC One and BBC One HD. It aired internationally on BBC Earth and other networks. The series received universal critical acclaim, with many reviewers commending the use of new filmmaking technology and declaring it among the best nature documentaries of all time. It won two Television Awards and two Television Craft Awards from the British Academy of Film and Television Arts, and two Pri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
