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Swedish–Russian Arc-of-Meridian Expedition
The Swedish–Russian Arc-of-Meridian expedition was a scientific expedition to Svalbard that took place from 1899 to 1902. The main purpose of the mission was to measure a meridian arc, in order to determine the earth flattening at the poles. The measurements were done by an establishing a chain of triangulation points from Keilhaufjellet in Sørkapp Land to Vesle Tavleøya north of Nordaustlandet. The Russians were responsible for the southern measurements, while the Swedes performed the northern measurements from a base at Crozierpynten on the eastern side of Sorgfjorden. A total arc of 4°10' was measured. The expedition also took the first photographs of the aurora An aurora (plural: auroras or aurorae), also commonly known as the polar lights, is a natural light display in Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Auroras display dynamic patterns of bri .... References Arctic expeditions Svalbard Geodetic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sorgfjorden
Sorgfjorden is a fjord at the northeastern coast of Spitsbergen, Svalbard. It cuts into Ny-Friesland Ny-Friesland is the land area between Wijdefjorden and Hinlopen Strait on Spitsbergen, Svalbard. The area is named after the Dutch province of Friesland Friesland (, ; official fry, Fryslân ), historically and traditionally known as Frisia ..., from the northern part of Hinlopen Strait. It is also called ''Treurenberg Bay''. References Fjords of Spitsbergen {{Spitsbergen-fjord-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1899 In Science
The year 1899 in science involved some significant events, listed below. Astronomy * December 2 – During the new moon, a near-grand conjunction of the classical planets and several binocular Solar System bodies occur. The Sun, Moon, Mercury, Mars and Saturn are all within 15° of each other, with Venus 5° ahead of this conjunction and Jupiter 15° behind. Accompanying the classical planets in this grand conjunction are Uranus (technically visible unaided in pollution-free skies), Ceres and Pallas. * The 80 cm refracting telescope is completed at Potsdam Observatory. Biology * May 1 – The National Trust in the United Kingdom acquires its first part of Wicken Fen, making it the country's oldest wetland nature reserve. * November 8 – The New York Zoological Society opens the Bronx Zoological Park to the public in New York City under the direction of William Temple Hornaday. Chemistry * Actinium is discovered by André-Louis Debierne. * International Committee on A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of Earth Science
History (derived ) is the systematic study and the documentation of the human activity. The time period of event before the invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as well as the memory, discovery, collection, organization, presentation, and interpretation of these events. Historians seek knowledge of the past using historical sources such as written documents, oral accounts, art and material artifacts, and ecological markers. History is not complete and still has debatable mysteries. History is also an academic discipline which uses narrative to describe, examine, question, and analyze past events, and investigate their patterns of cause and effect. Historians often debate which narrative best explains an event, as well as the significance of different causes and effects. Historians also debate the nature of history as an end in itself, as well as its usefulness to give perspective on the problems of the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geodetic Surveys
Geodesy ( ) is the Earth science of accurately measuring and understanding Earth's figure ( geometric shape and size), orientation in space, and gravity. The field also incorporates studies of how these properties change over time and equivalent measurements for other planets (known as ''planetary geodesy''). Geodynamical phenomena, including crustal motion, tides and polar motion, can be studied by designing global and national control networks, applying space geodesy and terrestrial geodetic techniques and relying on datums and coordinate systems. The job title is geodesist or geodetic surveyor. History Definition The word geodesy comes from the Ancient Greek word ''geodaisia'' (literally, "division of Earth"). It is primarily concerned with positioning within the temporally varying gravitational field. Geodesy in the German-speaking world is divided into "higher geodesy" ( or ), which is concerned with measuring Earth on the global scale, and "practical geodes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Svalbard
Svalbard ( , ), also known as Spitsbergen, or Spitzbergen, is a Norwegian archipelago in the Arctic Ocean. North of mainland Europe, it is about midway between the northern coast of Norway and the North Pole. The islands of the group range from 74° to 81° north latitude, and from 10° to 35° east longitude. The largest island is Spitsbergen, followed by Nordaustlandet and . The largest settlement is Longyearbyen. The islands were first used as a base by the whalers who sailed far north in the 17th and 18th centuries, after which they were abandoned. Coal mining started at the beginning of the 20th century, and several permanent communities were established. The Svalbard Treaty of 1920 recognizes Norwegian sovereignty, and the 1925 Svalbard Act made Svalbard a full part of the Kingdom of Norway. They also established Svalbard as a free economic zone and a demilitarized zone. The Norwegian Store Norske and the Russian remain the only mining companies in place. Res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arctic Expeditions
The Arctic ( or ) is a polar region located at the northernmost part of Earth. The Arctic consists of the Arctic Ocean, adjacent seas, and parts of Canada (Yukon, Northwest Territories, Nunavut), Danish Realm (Greenland), Finland, Iceland, Norway, Russia (Murmansk, Siberia, Nenets Okrug, Novaya Zemlya), Sweden and the United States (Alaska). Land within the Arctic region has seasonally varying snow and ice cover, with predominantly treeless permafrost (permanently frozen underground ice) containing tundra. Arctic seas contain seasonal sea ice in many places. The Arctic region is a unique area among Earth's ecosystems. The cultures in the region and the Arctic indigenous peoples have adapted to its cold and extreme conditions. Life in the Arctic includes zooplankton and phytoplankton, fish and marine mammals, birds, land animals, plants and human societies. Arctic land is bordered by the subarctic. Definition and etymology The word Arctic comes from the Greek word (''arkti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aurora
An aurora (plural: auroras or aurorae), also commonly known as the polar lights, is a natural light display in Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Auroras display dynamic patterns of brilliant lights that appear as curtains, rays, spirals, or dynamic flickers covering the entire sky. Auroras are the result of disturbances in the magnetosphere caused by the solar wind. Major disturbances result from enhancements in the speed of the solar wind from coronal holes and coronal mass ejections. These disturbances alter the trajectories of charged particles in the magnetospheric plasma. These particles, mainly electrons and protons, precipitate into the upper atmosphere (thermosphere/exosphere). The resulting ionization and excitation of atmospheric constituents emit light of varying colour and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crozierpynten
Crozierpynten is a headland in Ny-Friesland at Spitsbergen, Svalbard. It is located north of Heclahamna at the eastern side of Sorgfjorden Sorgfjorden is a fjord at the northeastern coast of Spitsbergen, Svalbard. It cuts into Ny-Friesland Ny-Friesland is the land area between Wijdefjorden and Hinlopen Strait on Spitsbergen, Svalbard. The area is named after the Dutch province .... It is named after lieutenant Crozier, member of an Arctic expedition in 1827. References Headlands of Spitsbergen {{Spitsbergen-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arc Measurement
Arc measurement, sometimes degree measurement (german: Gradmessung), is the astrogeodetic technique of determining of the radius of Earth – more specifically, the local Earth radius of curvature of the figure of the Earth – by relating the latitude difference (sometimes also the longitude difference) and the geographic distance (arc length) surveyed between two locations on Earth's surface. The most common variant involves only astronomical latitudes and the meridian arc length and is called ''meridian arc measurement''; other variants may involve only astronomical longitude (''parallel arc measurement'') or both geographic coordinates (''oblique arc measurement''). Arc measurement campaigns in Europe were the precursors to the International Association of Geodesy (IAG). History The first known arc measurement was performed by Eratosthenes (240 BC) between Alexandria and Syene in what is now Egypt, determining the radius of the Earth with remarkable correctness. In the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nordaustlandet
Nordaustlandet (sometimes translated as North East Land) is the second-largest island in the archipelago of Svalbard, Norway, with an area of . It lies north east of Spitsbergen, separated by Hinlopen Strait. Much of Nordaustlandet lies under large ice caps, mainly Austfonna and Vestfonna, the remaining parts of the north being tundra inhabited by reindeer and walruses. The island is uninhabited and lies entirely within Nordaust-Svalbard Nature Reserve. History English walrus hunters first sighted the south point of Nordaustlandet in 1617. This discovery was shown on the ''Muscovy Company's map'' (1625; but based on discoveries made in and prior to 1622), with the island labeled as ''Sir Thomas Smyth's Iland''. It also shows the North Cape (''Point Purchas''). It is first named ''Oostlandt'' ("East Land") on a Dutch 1662 map, and the following year another Dutch map marked its coastline more distinctly, showing its west and north coasts, separating the latter from the Seven Isl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vesle Tavleøya
Vesle Tavleøya ( en, Little Slate Island) is the larger island of the two northernmost of Sjuøyane - the other being Rossøya, north of Nordaustlandet, Svalbard. Vesle Tavleøya is situated some 7 km northeast of Phippsøya Phippsøya (anglicized as Phipps Island) is the largest island in Sjuøyane, an archipelago north of Nordaustlandet, Svalbard in Arctic Norway. It is located some 22 km north of Nordkapp on Svalbard proper and 8.5 km south of Rossøya, ..., the largest island of the islands, separated by Sjuøyflaket sound. References * Norwegian Polar InstitutPlace names in Norwegian polar areas Islands of Svalbard {{svalbard-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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