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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 |
Mathematical Formula
In science, a formula is a concise way of expressing information symbolically, as in a mathematical formula or a ''chemical formula''. The informal use of the term ''formula'' in science refers to the general construct of a relationship between given quantities. The plural of ''formula'' can be either ''formulas'' (from the most common English plural noun form) or, under the influence of scientific Latin, ''formulae'' (from the original Latin). In mathematics In mathematics, a formula generally refers to an identity which equates one mathematical expression to another, with the most important ones being mathematical theorems. Syntactically, a formula (often referred to as a ''well-formed formula'') is an entity which is constructed using the symbols and formation rules of a given logical language. For example, determining the volume of a sphere requires a significant amount of integral calculus or its geometrical analogue, the method of exhaustion. However, having done th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chasing Ice
''Chasing Ice'' is a 2012 documentary film about the efforts of nature photographer James Balog and his Extreme Ice Survey (EIS) to publicize the effects of climate change. The film was directed by Jeff Orlowski. It was released in the United States on November 16, 2012. The documentary includes scenes from a glacier calving event that took place at Jakobshavn Glacier in Greenland, lasting 75 minutes, the longest such event ever captured on film. Two EIS videographers waited several weeks in a small tent overlooking the glacier and finally, were able to witness of ice crashing off the glacier. "The calving of a massive glacier believed to have produced the ice that sank the Titanic is like watching a city break apart." Synopsis Environmental photographer James Balog heads to Greenland, Iceland and Alaska in order to capture images that will help to convey the effects of global warming. Balog was initially skeptical about climate change when the issue entered scientific discussio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lower Manhattan
Lower Manhattan (also known as Downtown Manhattan or Downtown New York) is the southernmost part of Manhattan, the central borough for business, culture, and government in New York City, which is the most populated city in the United States with over 8.8 million residents as of the 2020 census. Lower Manhattan is defined most commonly as the area delineated on the north by 14th Street, on the west by the Hudson River, on the east by the East River, and on the south by New York Harbor. The Lower Manhattan business district, known as the Financial District (FiDi), forms the main core of the area below Chambers Street. It is a leading global center for commerce, housing Wall Street, the New York Stock Exchange, and the Federal Reserve Bank of New York. The city itself originated at the southern tip of Manhattan Island in 1624 at a point that now constitutes the present-day Financial District. The population of the Financial District alone has grown to an estimated 61,000 resid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Balog
James Balog (pronounced ''BAY-log''; born July 15, 1952) sometimes referred to as Jim Balog, is an American photographer whose work explores the relationship between humans and nature. Since the early 1980s, Balog has photographed such subjects as endangered animals, North America's old-growth forests, and polar ice. His work aims to combine insights from art and science to produce innovative interpretations of our changing world. Balog's best-known project explores the impact of climate change on the world's glaciers. In 2007, he initiated the Extreme Ice Survey, the most wide-ranging ground-based photographic glacier study ever conducted. ''National Geographic'' magazine showcased Balog's ice work in June 2007 and June 2010, and the project is featured in the 2009 NOVA documentary ''Extreme Ice''See Extreme Ice'. as well as the 75-minute film ''Chasing Ice'', which premiered in January 2012. Balog's book ''Ice: Portraits of the World’s Vanishing Glaciers'' summarizes the w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fjord
In physical geography, a fjord or fiord () is a long, narrow inlet with steep sides or cliffs, created by a glacier. Fjords exist on the coasts of Alaska, Antarctica, British Columbia, Chile, Denmark, Germany, Greenland, the Faroe Islands, Iceland, Ireland, Kamchatka, the Kerguelen Islands, Labrador, Newfoundland, New Zealand, Norway, Novaya Zemlya, Nunavut, Quebec, the Patagonia region of Argentina and Chile, Russia, South Georgia Island, Tasmania, United Kingdom, and Washington state. Norway's coastline is estimated to be long with its nearly 1,200 fjords, but only long excluding the fjords. Formation A true fjord is formed when a glacier cuts a U-shaped valley by ice segregation and abrasion of the surrounding bedrock. According to the standard model, glaciers formed in pre-glacial valleys with a gently sloping valley floor. The work of the glacier then left an overdeepened U-shaped valley that ends abruptly at a valley or trough end. Such valleys are fjords wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctic Peninsula
The Antarctic Peninsula, known as O'Higgins Land in Chile and Tierra de San Martín in Argentina, and originally as Graham Land in the United Kingdom and the Palmer Peninsula in the United States, is the northernmost part of mainland Antarctica. The Antarctic Peninsula is part of the larger peninsula of West Antarctica, protruding from a line between Cape Adams (Weddell Sea) and a point on the mainland south of the Eklund Islands. Beneath the ice sheet that covers it, the Antarctic Peninsula consists of a string of bedrock islands; these are separated by deep channels whose bottoms lie at depths considerably below current sea level. They are joined by a grounded ice sheet. Tierra del Fuego, the southernmost tip of South America, is about away across the Drake Passage. The Antarctic Peninsula is in area and 80% ice-covered. The marine ecosystem around the western continental shelf of the Antarctic Peninsula (WAP) has been subjected to rapid climate change. Over the past 50 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weddell Sea
The Weddell Sea is part of the Southern Ocean and contains the Weddell Gyre. Its land boundaries are defined by the bay formed from the coasts of Coats Land and the Antarctic Peninsula. The easternmost point is Cape Norvegia at Princess Martha Coast, Queen Maud Land. To the east of Cape Norvegia is the King Haakon VII Sea. Much of the southern part of the sea is covered by a permanent, massive ice shelf field, the Filchner-Ronne Ice Shelf. The sea is contained within the two overlapping Antarctic territorial claims of Argentine Antarctica, the British Antarctic Territory, and also resides partially within the Antarctic Chilean Territory. At its widest the sea is around across, and its area is around . Various ice shelves, including the Filchner-Ronne Ice Shelf, fringe the Weddell sea. Some of the ice shelves on the east side of the Antarctic Peninsula, which formerly covered roughly of the Weddell Sea, had completely disappeared by 2002. The Weddell Sea has been deemed by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manhattan
Manhattan (), known regionally as the City, is the most densely populated and geographically smallest of the five boroughs of New York City. The borough is also coextensive with New York County, one of the original counties of the U.S. state of New York. Located near the southern tip of New York State, Manhattan is based in the Eastern Time Zone and constitutes both the geographical and demographic center of the Northeast megalopolis and the urban core of the New York metropolitan area, the largest metropolitan area in the world by urban landmass. Over 58 million people live within 250 miles of Manhattan, which serves as New York City’s economic and administrative center, cultural identifier, and the city’s historical birthplace. Manhattan has been described as the cultural, financial, media, and entertainment capital of the world, is considered a safe haven for global real estate investors, and hosts the United Nations headquarters. New York City is the headquarters of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ellesmere Island
Ellesmere Island ( iu, script=Latn, Umingmak Nuna, lit=land of muskoxen; french: île d'Ellesmere) is Canada's northernmost and List of Canadian islands by area, third largest island, and the List of islands by area, tenth largest in the world. It comprises an area of , slightly smaller than Great Britain, and the total length of the island is . Lying within the Arctic Archipelago, Ellesmere Island is considered part of the Queen Elizabeth Islands. Cape Columbia at 83°06′ is the northernmost point of land in Canada and one of the northernmost points of land on the planet (the northernmost point of land on Earth is the nearby Kaffeklubben Island of Greenland). The Arctic Cordillera mountain system covers much of Ellesmere Island, making it the most mountainous in the Arctic Archipelago. More than one-fifth of the island is protected as Quttinirpaaq National Park. In 2021, the population of Ellesmere Island was recorded at 144. There are three settlements: Alert, Nunavut, Aler ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jakobshavn Retreat-1851-2006
Ilulissat, formerly Jakobshavn or Jacobshaven, is the municipal seat and largest town of the Avannaata municipality in western Greenland, located approximately north of the Arctic Circle. With the population of 4,670 as of 2020, it is the third-largest city in Greenland, after Nuuk and Sisimiut. The city is home to almost as many sled-dogs as people. In direct translation, Ilulissat is the Kalaallisut word for "Icebergs" ( da, Isbjerge). The nearby Ilulissat Icefjord is a UNESCO World Heritage Site, and has made Ilulissat the most popular tourist destination in Greenland. Tourism is now the town's principal industry. The city neighbours the Ilulissat Icefjord, where there are enormous icebergs from the most productive glacier in the northern hemisphere. History The town was established as a trading post by Jacob Severin's company in 1741 and was named in his honor.Marquardt, Ole.Change and Continuity in Denmark's Greenland Policy in ''The Oldenburg Monarchy: An Underestim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tensile Stress
In continuum mechanics, stress is a physical quantity. It is a quantity that describes the magnitude of forces that cause deformation. Stress is defined as ''force per unit area''. When an object is pulled apart by a force it will cause elongation which is also known as deformation, like the stretching of an elastic band, it is called tensile stress. But, when the forces result in the compression of an object, it is called compressive stress. It results when forces like tension or compression act on a body. The greater this force and the smaller the cross-sectional area of the body on which it acts, the greater the stress. Therefore, stress is measured in newton per square meter (N/m2) or pascal (Pa). Stress expresses the internal forces that neighbouring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material. For example, when a solid vertical bar is supporting an overhead weight, each particle in the bar pushes o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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