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Upper-atmospheric Lightning
Upper-atmospheric lightning and ionospheric lightning are terms sometimes used by researchers to refer to a family of short-lived electrical-breakdown phenomena that occur well above the altitudes of normal lightning and storm clouds. Upper-atmospheric lightning is believed to be electrically induced forms of luminous plasma. The preferred usage is transient luminous event (TLE), because the various types of electrical-discharge phenomena in the upper atmosphere lack several characteristics of the more familiar tropospheric lightning. Transient luminous events have also been observed in far-ultraviolet images of Jupiter's upper atmosphere, high above the altitude of lightning-producing water clouds. Characteristics There are several types of TLEs, the most common being sprites. Sprites are flashes of bright red light that occur above storm systems. C-sprites (short for “columniform sprites”) is the name given to vertical columns of red light. C-sprites exhibiting tendrils ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteorologist
A meteorologist is a scientist who studies and works in the field of meteorology aiming to understand or predict Earth's atmospheric phenomena including the weather. Those who study meteorological phenomena are meteorologists in research, while those using mathematical models and knowledge to prepare daily weather forecasts are called ''weather forecasters'' or ''operational meteorologists''. Meteorologists work in government agencies, private consulting and research services, industrial enterprises, utilities, radio and television stations, and in education. They are not to be confused with weather presenters, who present the weather forecast in the media and range in training from journalists having just minimal training in meteorology to full fledged meteorologists. Description Meteorologists study the Earth's atmosphere and its interactions with the Earth's surface, the oceans and the biosphere. Their knowledge of applied mathematics and physics allows them to understand t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leader (spark)
A leader is a hot, highly conductive channel of plasma that plays a critical part during dielectric breakdown within a long electric spark. Mechanism When a gas is subjected to high voltage stress, the electric field is often quite non-uniform near one, or both, of the high voltage electrodes making up a spark gap. Breakdown initially begins with the formation of corona discharges near the electrode with the highest electrical stress. If the electrical field is further increased, longer length ''cold'' discharges (called '' streamers'' or ''burst corona'') sporadically form near the stressed electrode. Streamers attract multiple electron avalanches into a single channel, propagating forward quickly via photon emission which leads to photoelectrons producing new avalanches. Streamers redistribute charge within the surrounding gas, temporarily forming regions of excess charge ( space charges) in the regions surrounding the discharges. If the electrical field is sufficiently h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gigantic Jet NOIRLab
* ''Gigantic'' may refer to a 2008 film. * ''Gigantic'', a cancelled Disney movie * "Gigantic" (song), a song by Pixies * ''Gigantic'' (magazine) an American literary magazine * ''Gigantic'' (video game), a free-to-play video game developed by Motiga * ''Gigantic'' (TV series), a TV series on TeenNick * '' Gigantic (A Tale of Two Johns)'', a 2002 documentary film * Gigantism Gigantism ( el, γίγας, ''gígas'', " giant", plural γίγαντες, ''gígantes''), also known as giantism, is a condition characterized by excessive growth and height significantly above average. In humans, this condition is caused by o ..., a condition characterized by excessive growth and height significantly above average * HMHS ''Britannic'', a ship originally named "RMS ''Gigantic''" See also * * * Giant (other) {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Meteorological Society
The American Meteorological Society (AMS) is the premier scientific and professional organization in the United States promoting and disseminating information about the atmospheric, oceanic, and hydrologic sciences. Its mission is to advance the atmospheric and related sciences, technologies, applications, and services for the benefit of society. Background Founded on December 29, 1919, by Charles Franklin Brooks at a meeting of the American Association for the Advancement of Science in St. Louis and incorporated on January 21, 1920, the American Meteorological Society has a membership of more than 13,000 weather, water, and climate scientists, professionals, researchers, educators, students, and enthusiasts. AMS offers numerous programs and services in the sphere of water, weather and climate sciences. It publishes eleven atmospheric and related oceanic and hydrologic journals (in print and online), sponsors as many as twelve conferences annually, and administers profession ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes, and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, which interact to produce mountain ranges, volcanoes, and earthquakes. Earth's liquid outer core generates the magnetic field that shapes the magnetosphere of the Earth, deflecting destructive solar winds. The atmosphere of the Earth consists mostly of nitrogen and oxygen. Greenhouse gases in the atmosphere like carbon dioxide (CO2) trap a part of the energy from the Sun close to the surface. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. More sola ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Backronym
A backronym is an acronym formed from an already existing word by expanding its letters into the words of a phrase. Backronyms may be invented with either serious or humorous intent, or they may be a type of false etymology or folk etymology. The word is a portmanteau of ''back'' and ''acronym''. An acronym is a word derived from the initial letters of the words of a phrase, such as ''radar'' from "''ra''dio ''d''etection ''a''nd ''r''anging". By contrast, a backronym is "an acronym deliberately formed from a phrase whose initial letters spell out a particular word or words, either to create a memorable name or as a fanciful explanation of a word's origin." Many fictional espionage organizations are backronyms, such as SPECTRE (''sp''ecial ''e''xecutive for ''c''ounterintelligence, ''t''errorism, ''r''evenge and ''e''xtortion) from the James Bond franchise. For example, the Amber Alert missing-child program was named after Amber Hagerman, a nine-year-old girl who was abduct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puck (A Midsummer Night's Dream)
Puck, or Robin Goodfellow, is a character in William Shakespeare's play, '' A Midsummer Night's Dream''. Based on the Puck of English mythology and the púca of Celtic mythology, Puck is a mischievous fairy, sprite, or jester. He is the first of the main fairy characters to appear, and he significantly influences events in the play. He delights in pranks such as replacing Bottom's head with that of an ass. Appearances in the play The audience is introduced to Puck in 2.1: FAIRY: Either I mistake your shape and making quite, Or else you are that shrewd and knavish sprite Call'd Robin Goodfellow: are you not he That frights the maidens of the villagery; Skim milk, and sometimes labour in the quern, And bootless make the breathless housewife churn; And sometime make the drink to bear no barm; Mislead night wanderers, laughing at their harm? Those that Hobgoblin call you and sweet Puck, You do their work, and they shall have good luck: Are you not he? PUCK: Fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ariel (The Tempest)
Ariel is a spirit who appears in William Shakespeare's play '' The Tempest''. Ariel is bound to serve the magician Prospero, who rescued him from the tree in which he was imprisoned by Sycorax, the witch who previously inhabited the island. Prospero greets disobedience with a reminder that he saved Ariel from Sycorax's spell, and with promises to grant Ariel his freedom. Ariel is Prospero's eyes and ears throughout the play, using his magical abilities to cause the tempest in Act One which gives the play its name, and to foil other characters' plots to bring down their master. Ariel means "Lion of God" in the Hebrew language. Ariel may also be a simple play on the word "aerial". Scholars have compared Ariel to spirits depicted in other Elizabethan plays, and have managed to find several similarities between them, but one thing which makes Ariel unique is the human edge and personality given to Ariel by Shakespeare. The name is also phonetically similar to the word "areal", m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sprite (creature)
A sprite is a supernatural entity in European mythology. They are often depicted as fairy-like creatures or as an ethereal entity. The word ''sprite'' is derived from the Latin ''spiritus'' ("spirit"), via the French ''esprit''. Variations on the term include ''spright'' and the Celtic '' spriggan''. The term is chiefly used with regard to elves and fairies in European folklore, and in modern English is rarely used in reference to spirits. Belief in sprites The belief in diminutive beings such as sprites, elves, fairies, etc. has been common in many parts of the world, and might to some extent still be found within neo-spiritual and religious movements such as " neo-druidism" and Ásatrú. In some elemental magics, the sprite is often believed to be the elemental of air (see also sylph). Water sprite A water sprite (also called a water fairy or water faery) is a general term for an elemental spirit associated with water, according to alchemist Paracelsus. Water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lightning
Lightning is a naturally occurring electrostatic discharge during which two electrically charged regions, both in the atmosphere or with one on the ground, temporarily neutralize themselves, causing the instantaneous release of an average of one gigajoule of energy. This discharge may produce a wide range of electromagnetic radiation, from heat created by the rapid movement of electrons, to brilliant flashes of visible light in the form of black-body radiation. Lightning causes thunder, a sound from the shock wave which develops as gases in the vicinity of the discharge experience a sudden increase in pressure. Lightning occurs commonly during thunderstorms as well as other types of energetic weather systems, but volcanic lightning can also occur during volcanic eruptions. The three main kinds of lightning are distinguished by where they occur: either inside a single thundercloud (intra-cloud), between two clouds (cloud-to-cloud), or between a cloud and the ground ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cumulonimbus
Cumulonimbus (from Latin ''cumulus'', "heaped" and ''nimbus'', "rainstorm") is a dense, towering vertical cloud, typically forming from water vapor condensing in the lower troposphere that builds upward carried by powerful buoyant air currents. Above the lower portions of the cumulonimbus the water vapor becomes ice crystals, such as snow and graupel, the interaction of which can lead to hail and to lightning formation, respectively. When occurring as a thunderstorm these clouds may be referred to as thunderheads. Cumulonimbus can form alone, in clusters, or along squall lines. These clouds are capable of producing lightning and other dangerous severe weather, such as tornadoes, hazardous winds, and large hailstones. Cumulonimbus progress from overdeveloped cumulus congestus clouds and may further develop as part of a supercell. Cumulonimbus is abbreviated Cb. Appearance Towering cumulonimbus clouds are typically accompanied by smaller cumulus clouds. The cumulonimbus base m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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