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Petrie Ice Rises
Petrie Ice Rises () is a group of ice rises extending in a north-south line, lying merged within the Wilkins Ice Shelf, to the west of Alexander Island, Antarctica. The group was seen from the air on a British Antarctic Survey (BAS) radio echo sounding flight around Alexander Island on 11 February 1967 and was later accurately positioned from US Landsat imagery. It was named by the United Kingdom Antarctic Place-Names Committee in 1980 after David L. Petrie, a BAS and Scott Polar Research Institute The Scott Polar Research Institute (SPRI) is a centre for research into the polar regions and glaciology worldwide. It is a sub-department of the Department of Geography in the University of Cambridge, located on Lensfield Road in the south o ... electronics technician (from about 1966–1970), who was on the flight. See also * Dvořák Ice Rise * Ives Ice Rise * Martin Ice Rise Ice rises of Antarctica Bodies of ice of Alexander Island {{AlexanderIsland-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Rise
An ice rise is a clearly defined elevation of the otherwise very much flatter ice shelf, typically dome-shaped and rising several hundreds of metres above the surrounding ice shelf . An ice rise forms where the ice shelf touches the seabed due to a locally increased elevation of the seabed, which however remains below sea level. (In contrast, an elevation in the seabed that extends above sea level is defined as an island). The ice shelf flows over the seabed elevation, completely covering it with ice, thereby forming an ice rise. The resulting stress increases cause crevasse formation around the ice rise. An island within and totally covered by the ice shelf may appear the same as an ice rise. Elaborate measurements may be required to distinguish between these two geographic features. Although ice rises are typically located within the ice shelf area, they can partially face the open sea. At present, ice rises are found only within the ice shelves of Antarctica. The largest ice ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilkins Ice Shelf
Wilkins or Wilkin is a name variant of William, and may refer to: People Given name: Wilkin * Wilkins (singer) (Germán Wilkins Vélez Ramírez, born 1953), Puerto Rican pop music singer and composer * Wilkin Castillo (born 1984), Dominican baseball catcher * Wilkin Mota (born 1981), Indian cricketer * Wilkin Ramírez (born 1985), Dominican baseball outfielder * Wilkin Ruan (born 1978), Dominican baseball outfielder Given name: Wilkins * Wilkins P. Horton (1889–1950), American lawyer, lieutenant governor of North Carolina 1937–1941 * Wilkins Micawber, character in Charles Dickens's novel ''David Copperfield'' * Wilkins F. Tannehill (1787–1858), American politician and author Surname * Wilkins (surname) * Wilkin (surname) Places and geographical features * Edness K. Wilkins State Park, a state park in Wyoming * Fort Wilkins Historic State Park, a historical location in Michigan * Wilkins Coast, a portion of the eastern coast of Antarctica * Wilkin County, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Island
Alexander Island, which is also known as Alexander I Island, Alexander I Land, Alexander Land, Alexander I Archipelago, and Zemlja Alexandra I, is the largest island of Antarctica. It lies in the Bellingshausen Sea west of Palmer Land, Antarctic Peninsula from which it is separated by Marguerite Bay and George VI Sound. The George VI Ice Shelf entirely fills George VI Sound and connects Alexander Island to Palmer Land. The island partly surrounds Wilkins Sound, which lies to its west.Stewart, J. (2011) ''Antarctic An Encyclopedia'' McFarland & Company Inc, New York. 1776 pp. . Alexander Island is about long in a north–south direction, wide in the north, and wide in the south. Alexander Island is the second-largest uninhabited island in the world, after Devon Island. History Alexander Island was discovered on January 28, 1821, by a Russian expedition under Fabian Gottlieb von Bellingshausen, who named it Alexander I Land for the reigning Tsar Alexander I of Russia. Wha ... [...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] |
British Antarctic Survey
The British Antarctic Survey (BAS) is the United Kingdom's national polar research institute. It has a dual purpose, to conduct polar science, enabling better understanding of global issues, and to provide an active presence in the Antarctic on behalf of the UK. It is part of the Natural Environment Research Council (NERC). With over 400 staff, BAS takes an active role in Antarctic affairs, operating five research stations, one ship and five aircraft in both polar regions, as well as addressing key global and regional issues. This involves joint research projects with over 40 UK universities and more than 120 national and international collaborations. Having taken shape from activities during World War II, it was known as the Falkland Islands Dependencies Survey until 1962. History Operation Tabarin was a small British expedition in 1943 to establish permanently occupied bases in the Antarctic. It was a joint undertaking by the Admiralty and the Colonial Office. At the end of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landsat Program
The Landsat program is the longest-running enterprise for acquisition of satellite imagery of Earth. It is a joint NASA / United States Geological Survey, USGS program. On 23 July 1972, the Landsat 1, Earth Resources Technology Satellite was launched. This was eventually renamed to Landsat 1 in 1975. The most recent, Landsat 9, was launched on 27 September 2021. The instruments on the Landsat satellites have acquired millions of images. The images, archived in the United States and at Landsat receiving stations around the world, are a unique resource for global change research and applications in agriculture, cartography, geology, forestry, regional planning, surveillance and education, and can be viewed through the U.S. Geological Survey (USGS) "EarthExplorer" website. Landsat 7 data has eight spectral bands with Image resolution#Spatial resolution, spatial resolutions ranging from ; the temporal resolution is 16 days. Landsat images are usually divided into scenes for easy do ... [...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] |
Scott Polar Research Institute
The Scott Polar Research Institute (SPRI) is a centre for research into the polar regions and glaciology worldwide. It is a sub-department of the Department of Geography in the University of Cambridge, located on Lensfield Road in the south of Cambridge. SPRI was founded by Frank Debenham in 1920 as the national memorial to Captain Robert Falcon Scott and his companions, who died on their return journey from the South Pole in 1912. It investigates issues relevant to the Arctic and Antarctic in the environmental sciences, social sciences and humanities. The institute is home the Polar Museum and has some 60 personnel, consisting of academic, library and support staff plus postgraduate students, associates and fellows attached to research programmes. The institute also hosts the Scientific Committee on Antarctic Research. Research SPRI has several research groups. Notable researchers that have been based at the institute include Julian Dowdeswell, British diplomat Bryan Robert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dvořák Ice Rise
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Dvořák Ice Rise () is an ice rise in extent, rising above the ice of Mendelssohn Inlet in the southwest part of Alexander Island, Antarctica. It was first mapped, from air photos taken by the Ronne Antarctic Research Expedition, 1947–48, by D. Searle of the Falkland Islands Dependencies Survey in 1960, and was named by the UK Antarctic Place-Names Committee after Antonín Dvořák, the Czech composer. (1841-1904). See also * Martin Ice Rise * Petrie Ice Rises References Ice rises of Antarctica Bodies of ice of Alexander Island Ice Rise An ice rise is a clearly defined elevation of the otherwise very much flatter ice shelf, typically dome-shaped and rising several hundreds of metres above the surrounding ice shelf . An ice rise forms where the ice shelf touches the seabed due t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ives Ice Rise
Ives Ice Rise is an ice rise about long at the head of Weber Inlet, an ice-filled inlet situated between Bennett Dome and Berlioz Point on the Beethoven Peninsula, situated in the southwest part of Alexander Island in Antarctica. It was mapped by the United States Geological Survey from U.S. Navy aerial photographs taken 1967–68 and Landsat imagery taken 1972–73. In association with the names of composers grouped in this area, it was named by the Advisory Committee on Antarctic Names after Charles Ives, the American composer. See also * Dvořák Ice Rise * Petrie Ice Rises Petrie Ice Rises () is a group of ice rises extending in a north-south line, lying merged within the Wilkins Ice Shelf, to the west of Alexander Island, Antarctica. The group was seen from the air on a British Antarctic Survey (BAS) radio echo soun ... References Ice rises of Antarctica Bodies of ice of Alexander Island {{AlexanderIsland-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin Ice Rise
Martin Ice Rise () is an ice rise, long and wide, merged within the George VI Ice Shelf and the George VI Sound, located southwest of Kirwan Inlet, off the east coast of Alexander Island and the west coast of Palmer Land, Antarctica. It was delineated as an ice rise from U.S. Landsat imagery of January 1973, and was named in 1977 by the UK Antarctic Place-Names Committee after Sir David Martin (1914–76), Executive Secretary of the Royal Society, 1947–76, who played a leading role in organizing the Royal Society International Geophysical Year Expedition, 1956–58. See also * Dvořák Ice Rise * Petrie Ice Rises Petrie Ice Rises () is a group of ice rises extending in a north-south line, lying merged within the Wilkins Ice Shelf, to the west of Alexander Island, Antarctica. The group was seen from the air on a British Antarctic Survey (BAS) radio echo soun ... References Ice rises of Antarctica Bodies of ice of Alexander Island {{AlexanderIsland-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Rises Of Antarctica
Ice is water frozen into a solid state, typically forming at or below temperatures of 0 degrees Celsius or Depending on the presence of impurities such as particles of soil or bubbles of air, it can appear transparent or a more or less opaque bluish-white color. In the Solar System, ice is abundant and occurs naturally from as close to the Sun as Mercury to as far away as the Oort cloud objects. Beyond the Solar System, it occurs as interstellar ice. It is abundant on Earth's surfaceparticularly in the polar regions and above the snow lineand, as a common form of precipitation and deposition, plays a key role in Earth's water cycle and climate. It falls as snowflakes and hail or occurs as frost, icicles or ice spikes and aggregates from snow as glaciers and ice sheets. Ice exhibits at least eighteen phases ( packing geometries), depending on temperature and pressure. When water is cooled rapidly (quenching), up to three types of amorphous ice can form depending on its his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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