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Dibble Glacier Tongue
Dibble Glacier Tongue () is a large glacier tongue extending seaward from Dibble Glacier in Wilkes Land, Antarctica. The seaward end of the glacier tongue is named Dibble Iceberg Tongue. It was delineated from air photos taken by U.S. Navy Operation Highjump (1946–47), and was named by the Advisory Committee on Antarctic Names for Jonas Dibble and the unsung crew members of the United States Exploring Expedition squadron under Lieutenant Charles Wilkes Charles Wilkes (April 3, 1798 – February 8, 1877) was an American naval officer, ship's captain, and explorer. He led the United States Exploring Expedition (1838–1842). During the American Civil War (1861–1865), he commanded ' during the ..., 1838–42. References Ice tongues of Antarctica Bodies of ice of Wilkes Land {{WilkesLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacier Tongue
An ice tongue is a long and narrow sheet of ice projecting out from the coastline. An ice tongue forms when a valley glacier moves very rapidly (relative to surrounding ice) out into the ocean or a lake. They can gain mass from water freezing at their base, or by snow falling on top of them. Mass is then lost by calving or by melting. Ice tongues can range in length from to . Icebergs are often formed when ice tongues break off in part or wholly from the main glacier. Two examples of ice tongues are the Erebus Ice Tongue and the Drygalski Ice Tongue. References * Bodies of ice Glaciers {{glaciology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dibble Glacier
Dibble Glacier in Antarctica is a prominent channel glacier flowing from the continental ice and terminating in a prominent tongue at the east side of Davis Bay. It was delineated from air photos taken by U.S. Navy Operation Highjump (1946–47), and named by the Advisory Committee on Antarctic Names for Jonas Dibble, ship's carpenter on the sloop ''Peacock'' of the United States Exploring Expedition (1838–42) under Charles Wilkes. Dibble is credited with leaving his sick bed and working 24 hours without relief with other carpenters to repair a broken rudder on the ''Peacock'', when the ship was partially crushed in an ice bay in 151°19′E and forced to retire northward. Important Bird Area A 500 ha site on fast ice about 5 km from the north-eastern margin of the glacier has been designated an Important Bird Area (IBA) by BirdLife International because it supports a breeding colony of emperor penguins, with an estimate of some 12,500 individuals based on 2009 satel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilkes Land
Wilkes Land is a large district of land in eastern Antarctica, formally claimed by Australia as part of the Australian Antarctic Territory, though the validity of this claim has been placed for the period of the operation of the Antarctic Treaty, to which Australia is a signatory. Geography Wilkes Land fronts on the southern Indian Ocean between Queen Mary Coast and Adelie Land, extending from Cape Hordern in 100°31' E to Pourquoi Pas Point, in 136°11' E. The region extends as a sector about 2600 km towards the South Pole, with an estimated land area of 2,600,000 km², mostly glaciated. Subdivisions It is further subdivided in the following coastal areas which can also be thought of as sectors extending to the South Pole: # Knox Land: 100°31' E to 109°16' E # Budd Land: 109°16' E to 115°33' E # Sabrina Land: 115°33' E to 122°05' E # Banzare Land: 122°05' E to 130°10' E # Clarie Land: (Wilkes Coast) 130° ... [...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] |
Dibble Iceberg Tongue
Dibble Iceberg Tongue () is an iceberg tongue at the seaward end of Dibble Glacier Tongue. The names Dibble Glacier and Dibble Glacier Tongue were applied by the Advisory Committee on Antarctic Names (US-ACAN) in 1955, concurrent with G.D. Blodgett's delineation of the features from aerial photographs taken by U.S. Navy Operation Highjump (1946–47). The offshore segment of these two related features was photographed by the Australian National Antarctic Research Expeditions in 1956 and 1959, and the Antarctic Names Committee of Australia subsequently recommended that it be named Dibble Iceberg Tongue. US-ACAN has approved the latter name only for the portion lying seaward of Dibble Glacier Tongue. See also * List of glaciers in the Antarctic * Glaciology Glaciology (; ) is the scientific study of glaciers, or more generally ice and natural phenomena that involve ice. Glaciology is an interdisciplinary Earth science that integrates geophysics, geology, physical geography, ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advisory Committee On Antarctic Names
The Advisory Committee on Antarctic Names (ACAN or US-ACAN) is an advisory committee of the United States Board on Geographic Names responsible for recommending commemorative names for features in Antarctica. History The committee was established in 1943 as the Special Committee on Antarctic Names (SCAN). It became the Advisory Committee on Antarctic Names in 1947. Fred G. Alberts was Secretary of the Committee from 1949 to 1980. By 1959, a structured nomenclature was reached, allowing for further exploration, structured mapping of the region and a unique naming system. A 1990 ACAN gazeeter of Antarctica listed 16,000 names. Description The United States does not recognise territorial boundaries within Antarctica, so ACAN assigns names to features anywhere within the continent, in consultation with other national nomenclature bodies where appropriate, as defined by the Antarctic Treaty System. The research and staff support for the ACAN is provided by the United States Geologi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jonas Dibble
Jonas may refer to: Geography * Jonas, Netherlands, Netherlands * Jonas, Pennsylvania, United States * Jonas Ridge, North Carolina, United States People with the name * Jonas (name), people with the given name or surname Jonas * Jonas, one of two Jeneum (figures in the Book of Mormon) * Jonah or Jonas, a prophet in the Hebrew Bible * Jonas (footballer, born 1943), full name Jonas Bento de Carvalho, Brazilian football midfielder * Jonas (footballer, born 1972), full name Carlos Emanuel Romeu Lima, Angolan football midfielder * Jonas (footballer, born 1983), full name Jonas Brignoni dos Santos, Brazilian football defender * Jonas (footballer, born 1984), full name Jonas Gonçalves Oliveira, Brazilian football forward * Jonas (footballer, born 1987), full name Jonas Jessue da Silva Júnior, Brazilian football defender * Jonas (footballer, born 1991), full name Jonas Gomes de Sousa, Brazilian football midfielder Arts, entertainment, and media * ''Jonas'' (novel), a 1955 novel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Exploring Expedition
The United States Exploring Expedition of 1838–1842 was an exploring and surveying expedition of the Pacific Ocean and surrounding lands conducted by the United States. The original appointed commanding officer was Commodore Thomas ap Catesby Jones. Funding for the original expedition was requested by President John Quincy Adams in 1828; however, Congress would not implement funding until eight years later. In May 1836, the oceanic exploration voyage was finally authorized by Congress and created by President Andrew Jackson. The expedition is sometimes called the U.S. Ex. Ex. for short, or the Wilkes Expedition in honor of its next appointed commanding officer, United States Navy Lieutenant Charles Wilkes. The expedition was of major importance to the growth of science in the United States, in particular the then-young field of oceanography. During the event, armed conflict between Pacific islanders and the expedition was common and dozens of natives were killed in action, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Wilkes
Charles Wilkes (April 3, 1798 – February 8, 1877) was an American naval officer, ship's captain, and explorer. He led the United States Exploring Expedition (1838–1842). During the American Civil War (1861–1865), he commanded ' during the Trent Affair in which he stopped a Royal Mail ship and removed two Confederate diplomats, which almost led to war between the United States and the United Kingdom. Early life and career Wilkes was born in New York City, on April 3, 1798, as the great nephew of the former Lord Mayor of London John Wilkes. His mother was Mary Seton, who died in 1802 when Charles was just three years old. As a result, Charles was raised by his aunt, Elizabeth Ann Seton, who would later convert to Roman Catholicism and become the first American-born woman canonized a saint by the Catholic Church. When Elizabeth was left widowed with five children, Charles was sent to a boarding school, and later attended Columbia College, which is the present-day Columbia Uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Tongues 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 hist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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