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Iceport
An iceport is a more-or-less permanent indentation in the front of an ice shelf, that can serve as a natural ice harbour. Though useful, they are not always reliable, as calving of surrounding ice shelves can render an iceport temporarily unstable and unusable. Historical and present use of iceports Iceports have played a critical role in Antarctic exploration. For example, the Bay of Whales (discovered and named by Ernest Shackleton in the ''Nimrod'' in 1908) served as the base for several important Antarctic expeditions, including: * 1910-1912: Amundsen's South Pole expedition, led by Roald Amundsen * 1928-1930: Richard Evelyn Byrd - First expedition * 1933-1935: Richard Evelyn Byrd - Second expedition * 1939-1941: United States Antarctic Service Expedition, led by Richard Evelyn Byrd Norsel Iceport was used by the Norwegian-British-Swedish Antarctic Expedition (NBSAE) to moor and unload the expedition ship in 1949. The NBSAE established Maudheim Station about 1 mile south of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Godel Iceport
Godel Iceport is an iceport about wide, which marks a more-or-less permanent indentation in the seaward front of the extensive ice shelf fringing the coast of Queen Maud Land. Discovery and naming Godel Iceport was named by United States Navy Operation Deep Freeze I personnel on the USS ''Glacier'' (AGB-4), who made a running survey of this coast in March 1956, for William H. Godel, deputy director of the Office of Special Operations, Department of the Navy, who assisted in formulating expedition plans and policy. The term "iceport" was suggested by the Advisory Committee on Antarctic Names in 1956 to denote an ice shelf indentation, subject to configuration changes, which may offer anchorage or possible access to the upper surface of an ice shelf via ice ramps along one or more sides of the feature. See also * Ice pier * Atka Iceport * Erskine Iceport * Norsel Iceport * Bay of Whales The Bay of Whales was a natural ice harbour, or iceport, indenting the front of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norsel Iceport
Norsel Iceport (), also known as Norselbukta or Bukhta Nursel, is a small iceport in the front of the Quar Ice Shelf, along the coast of Queen Maud Land. Discovery and naming This feature was named by the Norwegian–British–Swedish Antarctic Expedition (NBSAE), 1949–52, which used it to moor and unload the expedition ship . The low ice front permitted easy access onto Quar Ice Shelf, where the NBSAE established Maudheim Station about 1 nautical mile south of the iceport. See also * Ice pier * Atka Iceport * Erskine Iceport * Godel Iceport * Bay of Whales The Bay of Whales was a natural ice harbour, or iceport, indenting the front of the Ross Ice Shelf just north of Roosevelt Island, Antarctica. It is the southernmost point of open ocean not only of the Ross Sea, but worldwide. The Ross Sea ex ... References External links Ports and harbours of Queen Maud Land {{PrincessMarthaCoast-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atka Iceport
Atka Iceport, also known as Atka Bay, is an iceport about long and wide, marking a more-or-less permanent indentation in the front of the Ekstrom Ice Shelf on the coast of Queen Maud Land. Discovery and naming Atka Iceport was mapped in detail by Norwegian cartographers from surveys and air photographs taken by the Norwegian-British-Swedish Antarctic Expedition (1949-1952), led by John Schjelderup Giæver. It was named by personnel of the USS ''Atka'', under U.S. Navy Commander Glen Jacobsen, which moored here in February 1955 while investigating possible base sites for International Geophysical Year operations. Station Atka Bay is the site of Germany's Neumayer-Station III. Important Bird Area A 425 ha tract of sea ice in the bay has been identified as an Important Bird Area by BirdLife International because it supports a breeding colony of about 12,000 emperor penguins. See also * Ice pier * Erskine Iceport * Godel Iceport * Norsel Iceport * Bay of Whales ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erskine Iceport
Erskine Iceport (), also known as Erskine Bay or General Erskine Bay, is an iceport about wide and long, which marks a more-or-less permanent indentation extending southeast into the seaward front of the extensive ice shelf fringing Queen Maud Land. Discovery and naming United States Navy Operation Deep Freeze I personnel on the USS ''Glacier'' made a running survey of this coast in March 1956. They applied the name "General Erskine Bay" for General Graves B. Erskine, United States Marine Corps, director of the U.S. Navy Office of Special Operations, who assisted in formulating expedition plans and policy. The term "iceport" was suggested by the Advisory Committee on Antarctic Names in 1956 to denote an ice shelf indentation, subject to configuration changes, which may offer anchorage or possible access to the upper surface of an ice shelf via ice ramps along one or more sides of the feature. See also * Ice pier * Atka Iceport * Godel Iceport * Norsel Iceport * Bay of Whale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bay Of Whales
The Bay of Whales was a natural ice harbour, or iceport, indenting the front of the Ross Ice Shelf just north of Roosevelt Island, Antarctica. It is the southernmost point of open ocean not only of the Ross Sea, but worldwide. The Ross Sea extends much further south – as far as the Gould Coast, some from the South Pole – but most of that area is covered by the Ross Ice Shelf rather than open sea. Discovery and naming Ernest Shackleton named the feature on January 24, 1908, during the Nimrod Expedition, because of the large number of whales seen near this location. History During his quest for the South Pole, Norwegian explorer Roald Amundsen established a temporary base, which he named Framheim, at the Bay of Whales. The base was used between January 1911February 1912, and was named after Amundsen's ship ''Fram''. The Bay of Whales has also served as a logistical support base for several other important Antarctic expeditions, including: * 1928–1930: Richard Evelyn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Pier
An ice pier or ice wharf is a man-made structure used to assist the unloading of ships in Antarctica. It is constructed by pumping seawater into a contained area and allowing the water to freeze. By repeating this procedure several times, additional layers are built up. The final structure is many metres in thickness, and strong enough to support container trucks. Operation Deep Freeze personnel constructed the first floating ice pier at Antarctica’s southernmost sea port at McMurdo Station in 1973."Unique ice pier provides harbor for ships," Antarctic Sun. January 8, 2006; McMurdo Station, Antarctica. Ice piers have been in use each season since, at McMurdo's natural [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nimrod (ship)
''Nimrod'' was a wooden-hulled, three-masted sailing ship with auxiliary steam engine that was built in Scotland in 1867 as a whaler. She was the ship with which Ernest Shackleton made his ''Nimrod'' Expedition to Antarctica in 1908–09. After the expedition she returned to commercial service, and in 1919 she was wrecked in the North Sea with the loss of ten members of her crew. Building and registration Alexander Stephen and Sons built ''Nimrod'' in Dundee. Her launch date is not recorded, but she was completed in January 1867. Her registered length was , her beam was and her depth was . Her tonnages were and . She was rigged as a schooner. She had a single screw, driven by a 50 hp steam engine built by Gourlay Brothers of Dundee. Her principal owner was Thomas B Job, who registered her at Liverpool. Her United Kingdom official number was 55047. They used her for whaling and seal hunting. By 1874 ''Nimrod'' was rigged as a barquentine. By 1888 her owners were listed as J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tanker (ship)
A tanker (or tank ship or tankship) is a ship designed to transport or store liquids or gases in bulk. Major types of tankship include the oil tanker, the chemical tanker, and gas carrier. Tankers also carry commodities such as vegetable oils, molasses and wine. In the United States Navy and Military Sealift Command, a tanker used to refuel other ships is called an oiler (or replenishment oiler if it can also supply dry stores) but many other navies use the terms tanker and replenishment tanker. Tankers were first developed in the late 19th century as iron and steel hulls and pumping systems were developed. As of 2005, there were just over 4,000 tankers and supertankers or greater operating worldwide. Description Tankers can range in size of capacity from several hundred tons, which includes vessels for servicing small harbours and coastal settlements, to several hundred thousand tons, for long-range haulage. Besides ocean- or seagoing tankers there are also specialized ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harbour
A harbor (American English), harbour (British English; see spelling differences), or haven is a sheltered body of water where ships, boats, and barges can be docked. The term ''harbor'' is often used interchangeably with ''port'', which is a man-made facility built for loading and unloading vessels and dropping off and picking up passengers. Ports usually include one or more harbors. Alexandria Port in Egypt is an example of a port with two harbors. Harbors may be natural or artificial. An artificial harbor can have deliberately constructed breakwaters, sea walls, or jettys or they can be constructed by dredging, which requires maintenance by further periodic dredging. An example of an artificial harbor is Long Beach Harbor, California, United States, which was an array of salt marshes and tidal flats too shallow for modern merchant ships before it was first dredged in the early 20th century. In contrast, a natural harbor is surrounded on several sides of land. Examples ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Calving
Ice calving, also known as glacier calving or iceberg calving, is the breaking of ice chunks from the edge of a glacier.Essentials of Geology, 3rd edition, Stephen Marshak It is a form of ice ablation or ice disruption. It is the sudden release and breaking away of a mass of ice from a glacier, iceberg, ice front, ice shelf, or crevasse. The ice that breaks away can be classified as an iceberg, but may also be a growler, bergy bit, or a crevasse wall breakaway.Glossary of Glacier Terms Ellin Beltz, 2006. Retrieved July 2009. Calving of glaciers is often accompanied by a loud cracking or booming sound before blocks of ice up to high break loose and crash into the water. The entry of the ice into the water causes large, and often hazardous waves. The waves formed in locations like |
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] |
National Science Foundation
The National Science Foundation (NSF) is an independent agency of the United States government that supports fundamental research and education in all the non-medical fields of science and engineering. Its medical counterpart is the National Institutes of Health. With an annual budget of about $8.3 billion (fiscal year 2020), the NSF funds approximately 25% of all federally supported basic research conducted by the United States' colleges and universities. In some fields, such as mathematics, computer science, economics, and the social sciences, the NSF is the major source of federal backing. The NSF's director and deputy director are appointed by the President of the United States and confirmed by the United States Senate, whereas the 24 president-appointed members of the National Science Board (NSB) do not require Senate confirmation. The director and deputy director are responsible for administration, planning, budgeting and day-to-day operations of the foundation, while t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
