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Stephenson Glacier
Stephenson Glacier () is a glacier close west of Dovers Moraine on the east side of Heard Island in the southern Indian Ocean. Its terminus is between Dovers Moraine and Stephenson Lagoon, with part of the glacier flowing to Doppler Hill and Sealers Beach. To the north of Stephenson Glacier is Brown Glacier, whose terminus is located at Brown Lagoon. To the southwest of Stephenson Glacier is Winston Glacier, whose terminus is located at Winston Lagoon, between Cape Lockyer and Oatt Rocks. Discovery and naming Stephenson Glacier was surveyed by ANARE ( Australian National Antarctic Research Expeditions) in 1948. It was named by Antarctic Names Committee of Australia The Australian Antarctic Names and Medals Committee (AANMC) was established to advise the Government on names for features in the Australian Antarctic Territory and the subantarctic territory of Heard Island and the McDonald Islands. The commit ... (ANCA) for P.J. Stephenson, ANARE geologist on Heard Island ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirque
A (; from the Latin word ') is an amphitheatre-like valley formed by glacial erosion. Alternative names for this landform are corrie (from Scottish Gaelic , meaning a pot or cauldron) and (; ). A cirque may also be a similarly shaped landform arising from fluvial erosion. The concave shape of a glacial cirque is open on the downhill side, while the cupped section is generally steep. Cliff-like slopes, down which ice and glaciated debris combine and converge, form the three or more higher sides. The floor of the cirque ends up bowl-shaped, as it is the complex convergence zone of combining ice flows from multiple directions and their accompanying rock burdens. Hence, it experiences somewhat greater erosion forces and is most often overdeepened below the level of the cirque's low-side outlet (stage) and its down-slope (backstage) valley. If the cirque is subject to seasonal melting, the floor of the cirque most often forms a tarn (small lake) behind a dam, which marks the down ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sealers Beach
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Sealer may refer either to a person or ship engaged in seal hunting, or to a sealant; associated terms include: Seal hunting * Sealer Hill, South Shetland Islands, Antarctica * Sealers' Oven, bread oven of mud and stone built by sealers around 1800 near Albany, Western Australia * Sealers Passage, marine channel in the South Shetland Islands, Antarctica * Sealers' War, conflict in southern New Zealand started by sealers in 1810 Sealant * Concrete sealers, products applied to concrete to protect it from corrosion * Heat sealer, machine using heat to seal products * Stone sealer, surface treatment product to retard staining and corrosion in natural stone See also *Seal (other) *Sealing (other) Sealing may refer to: Processes * Seal (emblem), applying a seal to a document for authentication * Sealing wax, a wax material of a seal which, after melting, hardens quickly * Duct sealing, the sealing of leaks in air ducts * Induction sealing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian National Antarctic Research Expeditions
The Australian National Antarctic Research Expeditions (ANARE ) is the historical name for the Australian Antarctic Program (AAp) administered for Australia by the Australian Antarctic Division (AAD). History Australia has had a long involvement in south polar regions since as early as Douglas Mawson's Australasian Antarctic Expedition in 1911. Further Australian exploration of the Antarctic continent was conducted during the British Australian and New Zealand Antarctic Research Expedition (BANZARE), which was conducted over the years 1929–1931. The Australian National Antarctic Research Expeditions were established in 1947 with expeditions to Macquarie Island and Heard Island. In 1948 the Australian Antarctic Division (AAD) was established to administer the expedition program. ANARE Name The name ANARE fell out of official use in the early 2000s. However current and former Australian Antarctic expeditioners continue to use the term informally as a means of identifica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Lockyer
Cape Lockyer () is a steep rock headland northeast of Lambeth Bluff on the southeast side of Heard Island. It was surveyed in 1948 by Australian National Antarctic Research Expeditions and named by them for Lieutenant H.C.J. Lockyer, Royal Australian Naval Volunteer Reserve Royal Australian Naval Volunteer Reserve (RANVR) was a reserve force of the Royal Australian Navy. Formation In late 1920, the Navy Board proposed the creation of an Royal Australian Naval Volunteer Reserve scheme, with approaches made to yac ..., one of the officers on HMAS ''Labuan'', relief ship for the expedition. References Headlands of Heard Island and McDonald Islands {{Subantarctic-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winston Lagoon
Winston Lagoon () is a lagoon indenting the southeast coast of Heard Island in the southern Indian Ocean, about 1 nautical mile (1.9 km) northeast of Cape Lockyer. The feature is roughly portrayed on an American sealer chart of the 1860 period. It was sighted from the air by Lieutenant Malcolm Smith, RAAF, pilot of the ANARE (Australian National Antarctic Research Expeditions) seaplane that made the first reconnaissance flight over the island in 1948. Lieutenant Smith proposed that it be named Lake Winston after his wife. In view of his death in an aircraft accident shortly afterward, this proposal was adopted by Australian Antarctic Names and Medals Committee (ANCA) with only a change of generic term. Clichereto see a map of Heard Island and McDonald Islands The Territory of Heard Island and McDonald Islands (HIMI) is an Australian external territory comprising a volcanic group of mostly barren Antarctic islands, about two-thirds of the way from Madagascar to Antarctica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winston Glacier
Winston Glacier () is a glacier flowing to Winston Lagoon on the southeast side of Heard Island in the southern Indian Ocean. Its terminus is at Winston Lagoon, between Cape Lockyer and Oatt Rocks. To the northeast of Winston Glacier is Stephenson Glacier, the terminus of which is located between Dovers Moraine and Stephenson Lagoon. To the southwest of Winston Glacier is Fiftyone Glacier, whose terminus is located between Lavett Bluff and Lambeth Bluff. Discovery and naming Winston Glacier was surveyed by through the Australian National Antarctic Research Expeditions in 1948. It was named by Antarctic Names Committee of Australia in 1964 in association with nearby Winston Lagoon. See also * List of glaciers in the Antarctic *Retreat of glaciers since 1850 The retreat of glaciers since 1850 affects the availability of fresh water for irrigation and domestic use, mountain recreation, animals and plants that depend on glacier-melt, and, in the longer term, the level of the o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brown Lagoon
Brown is a color. It can be considered a composite color, but it is mainly a darker shade of orange. In the CMYK color model used in printing or painting, brown is usually made by combining the colors orange and black. In the RGB color model used to project colors onto television screens and computer monitors, brown combines red and green. The color brown is seen widely in nature, wood, soil, human hair color, eye color and skin pigmentation. Brown is the color of dark wood or rich soil. According to public opinion surveys in Europe and the United States, brown is the least favorite color of the public; it is often associated with plainness, the rustic, feces, and poverty. More positive associations include baking, warmth, wildlife, and the autumn. Etymology The term is from Old English , in origin for any dusky or dark shade of color. The first recorded use of ''brown'' as a color name in English was in 1000. The Common Germanic adjectives ''*brûnoz and *brûnâ'' meant both ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brown Glacier
Brown Glacier () is a glacier just south of Round Hill on the east side of Heard Island in the southern Indian Ocean. Its terminus is at Brown Lagoon. To the northwest of Brown Glacier is Compton Glacier, whose terminus is located at Compton Lagoon, between Gilchrist Beach and Fairchild Beach. To the southeast of Brown Glacier is Stephenson Glacier, whose terminus is located between Dovers Moraine and Stephenson Lagoon. Discovery and naming Brown Glacier was surveyed by ANARE ( Australian National Antarctic Research Expeditions) in 1948. Named by Antarctic Names Committee of Australia The Australian Antarctic Names and Medals Committee (AANMC) was established to advise the Government on names for features in the Australian Antarctic Territory and the subantarctic territory of Heard Island and the McDonald Islands. The commit ... (ANCA) for K.G. Brown, ANARE biologist on Heard Island in 1951. References Further reading * * * External linksA map of Heard Island and McD ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doppler Hill
The Doppler effect or Doppler shift (or simply Doppler, when in context) is the change in frequency of a wave in relation to an observer who is moving relative to the wave source. It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842. A common example of Doppler shift is the change of pitch heard when a vehicle sounding a horn approaches and recedes from an observer. Compared to the emitted frequency, the received frequency is higher during the approach, identical at the instant of passing by, and lower during the recession. The reason for the Doppler effect is that when the source of the waves is moving towards the observer, each successive wave crest is emitted from a position closer to the observer than the crest of the previous wave. Therefore, each wave takes slightly less time to reach the observer than the previous wave. Hence, the time between the arrivals of successive wave crests at the observer is reduced, causing an increa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tidewater Glacier
The tidewater glacier cycle is the typically centuries-long behavior of tidewater glaciers that consists of recurring periods of advance alternating with rapid retreat and punctuated by periods of stability. During portions of its cycle, a tidewater glacier is relatively insensitive to climate change. Calving rate of tidewater glaciers While climate is the main factor affecting the behavior of all glaciers, additional factors affect calving (iceberg-producing) tidewater glaciers. These glaciers terminate abruptly at the ocean interface, with large pieces of the glacier fracturing and separating, or calving, from the ice front as icebergs. Climate change causes a shift in the equilibrium line altitude (ELA) of a glacier. This is the imaginary line on a glacier, above which snow accumulates faster than it ablates, and below which, the reverse is the case. This altitude shift, in turn, prompts a retreat or advance of the terminus toward a new steady-state position. However, this ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacier Terminus
A glacier terminus, toe, or snout, is the end of a glacier at any given point in time. Although glaciers seem motionless to the observer, in reality glaciers are in endless motion and the glacier terminus is always either advancing or retreating. The location of the terminus is often directly related to glacier mass balance, which is based on the amount of snowfall which occurs in the accumulation zone of a glacier, as compared to the amount that is melted in the ablation zone. The position of a glacier terminus is also impacted by localized or regional temperature change over time. Tracking Tracking the change in location of a glacier terminus is a method of monitoring a glacier's movement. The end of the glacier terminus is measured from a fixed position in neighboring bedrock periodically over time. The difference in location of a glacier terminus as measured from this fixed position at different time intervals provides a record of the glacier's change. A similar way of trac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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