altitude definition science

These adaptations are similar to those induced by regular exercise so it would be reasonable to assume th… The rate of decrease of temperature with elevation is known as the adiabatic lapse rate, which is approximately 9.8 °C per kilometer (or 5.4 °F [3.0 °C] per 1000 feet) of altitude.[9]. This is known as an adiabatic process, which has a characteristic pressure-temperature curve. This is the process of convection. [14] As the altitude increases, atmospheric pressure decreases, which affects humans by reducing the partial pressure of oxygen. 1 a : the vertical elevation of an object above a surface (such as sea level or land) of a planet or natural satellite. Word usage can drift over the decades (height vs. altitude). altitude - the perpendicular distance from the base of a geometric figure to the opposite vertex (or side if parallel) distance, length - size of the gap between two places; "the distance from New York to Chicago"; "he determined the length of the shortest line segment joining the two points". However, above 8,000 metres (26,000 ft), (in the "death zone"), altitude acclimatization becomes impossible. As an average, the International Civil Aviation Organization (ICAO) defines an international standard atmosphere (ISA) with a temperature lapse rate of 6.49 °C per kilometer (3.56 °F per 1,000 feet). Questions? Sports organizations acknowledge the effects of altitude on performance: the International Association of Athletic Federations (IAAF), for example, marks record performances achieved at an altitude greater than 1,000 metres (3,300 ft) with the letter "A".[24]. The noun altitude refers to how high something rises: “The high altitude of the Himalayan mountain range slowed the progress of the hikers.” It is not intended to provide medical or other professional advice. Despite these environmental conditions, many species have been successfully adapted at high altitudes. Water vapor contains latent heat of vaporization. In geometry it is also used as the height of the object itself. Altitude. Mountains have an elevation based on how high they are and your mood has an elevation as you get happier. Common datums are mean sea level and the surface of the WGS-84 geoid, used by GPS. Why Altitude Training Works – The Science of Altitude Training Training at altitude has been used to improve athletic performance for decades. There are several types of altitude in aviation: These types of altitude can be explained more simply as various ways of measuring the altitude: The Earth's atmosphere is divided into several altitude regions. earth science. The most high-altitude point on Earth is Mount Everest, in the Himalayan mountain range on the border of Nepal and the Chinese region of Tibet. [19] Additionally, there is a dose response relationship between increasing elevation and decreasing obesity prevalence in the United States. An elevation is a rise or the raising of something. Her science teacher told her class about a very bright star called Sirius and Katie wanted to see if she could find it. Or view hourly updated newsfeeds in your RSS reader: Keep up to date with the latest news from ScienceDaily via social networks: Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. This principle is the basis of operation of the pressure altimeter, which is an aneroid barometer calibrated to indicate altitude instead of pressure. Extremely high altitude: 18,000+ feet (5,500+ meters). Finally, note that only the troposphere (up to approximately 11 kilometres (36,000 ft) of altitude) in the Earth's atmosphere undergoes notable convection; in the stratosphere, there is little vertical convection. Altitude is a way of measuring how far away from sea level, or Earth's surface, you are. Altitude definition, the height of anything above a given planetary reference plane, especially above sea level on earth. They differ in that your source nowhere mentions the geoid, so it can't be using your definition of orthometric height. 2. Animals have developed physiological adaptations to enhance oxygen uptake and delivery to tissues which can be used to sustain metabolism. How Will High Density Altitude Affect Me? However, people living at higher elevations have a statistically significant higher rate of suicide. [8], The temperature profile of the atmosphere is a result of an interaction between radiation and convection. For military applications where low temperatures are experienced in high altitude flight and for high temperatures in tropical regions, foam performance over a wide temperature range is important. "true altitude"), or implicitly through the context of the communication. However, regardless of the definition given, the idea is still the same as it always has to do with the comparison with a distance from the ground or sea. As air rises and cools, it eventually becomes saturated and cannot hold its quantity of water vapor. [21] The complement of this angle is the zenith angle (θ z), that is defined by the vertical and the line to the Sun (i.e., the angle of incidence of beam radiation on a horizontal surface). Atmospheric pressure decreases as altitude increases. Why Is an Empty Shampoo Bottle So Easy to Knock Over? Regions on the Earth's surface (or in its atmosphere) that are high above mean sea level are referred to as high altitude. The fundamental theory behind altitude training is simple: by exposing an athlete to an environment that is low in oxygen (a mountain top or simulated altitude room) the body will eventually adapt to this stress by getting more efficient at transporting and using oxygen (stronger respiratory muscles, more red blood cells and so on). In some definitions, heights, which are the vertical distance of an object from an object, point, or level above ground or other reference plane, are also called altitude, such as in AGL (above ground level) altitude, MSL (mean seal level) altitude, and indicated altitude (that indicated by an altimeter). [16][17] It can take days or weeks to adapt to high altitude. Longitude is a similar measurement east or west of the Greenwich meridian. Calculating Density Altitude 5. Sunlight in the visible spectrum hits the ground and heats it. What does altitude mean? Altitude means height above the ground or above the sea level. 2020 Tied for Warmest Year On Record: NASA, Climate Change: Billions in Flood Damages, Pulsar Acceleration: Milky Way's Dark Side, Platypus: How Odd Mammal Got to Be So Bizarre, Search for Dark Matter from the Multiverse, Virtual Contact Lenses for Radar Satellites. Counties", "Metabolic traits of westslope cutthroat trout, introduced rainbow trout and their hybrids in an ecotonal hybrid zone along an elevation gradient", Downloadable ETOPO2 Raw Data Database (2 minute grid), Downloadable ETOPO5 Raw Data Database (5 minute grid), Calculate true altitude with these JavaScript applications, https://en.wikipedia.org/w/index.php?title=Altitude&oldid=995521847, Short description is different from Wikidata, Articles needing additional references from December 2018, All articles needing additional references, Creative Commons Attribution-ShareAlike License, This page was last edited on 21 December 2020, at 14:20. Financial support for ScienceDaily comes from advertisements and referral programs, where indicated. This may be a separate, more general, question. Did this word (altitude) satisfy your request ()?Yes No: Definitions Related words. The position of a celestial object above an observer's horizon, measured in degrees along a … [22], For athletes, high altitude produces two contradictory effects on performance. Vertical distance measurements in the "down" direction are commonly referred to as depth. The term altitude has the same definition as the elevation. 3. The reference datum also often varies according to the context. Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Information and translations of altitude in the most comprehensive dictionary definitions … [18], There is a significantly lower overall mortality rate for permanent residents at higher altitudes. High altitude is sometimes defined to begin at 2,400 meters (8,000 ft) above sea level. rest of the solar system and the broader expanse of the universe is located As oxygen is used as a source of metabolic heat production, the hypobaric hypoxia at high altitudes is problematic. Most people can go up to 8,000 feet (2,438 meters) with minimal effects. ... Altitude to the Rescue! Height in relation to a specified reference point, Learn how and when to remove this template message, local barometric pressure at mean sea level, Atmospheric pressure § Altitude variation, "Medical Problems in High Mountain Environments. Altitude is the elevation of an object from a known level or datum. The Kármán line, at an altitude of 100 kilometres (62 mi) above sea level, by convention defines represents the demarcation between the atmosphere and space. Common datums are mean sea level and the surface of the WGS-84 geoid, used by GPS. Altitude or height (also sometimes known as 'depth') is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, atmospheric pressure, and many more). [7] The higher the altitude, the more likely are serious effects. Air is a poor conductor of heat, so a parcel of air will rise and fall without exchanging heat. The definition of altitude is … Altitude is defined on the following scale: Very high altitude: 12,000 - 18,000 feet (3,658 - 5,487 meters); and. [20] In addition, the recent hypothesis suggests that high altitude could be protective against Alzheimer's disease via action of erythropoietin, a hormone released by kidney in response to hypoxia. On the flight deck, the definitive instrument for measuring altitude is the pressure altimeter, which is an aneroid barometer with a front face indicating distance (feet or metres) instead of atmospheric pressure. Aviation altitude is measured using either mean sea level (MSL) or local ground level (above ground level, or AGL) as the reference datum. The altitudes stated below are averages:[3]. All 1.2 million residents live about 4,150 meters (13,615 feet) above sea level. The strategies used by animals to adapt to high altitude depend on their morphology and phylogeny. [25][26] These changes are the basis of altitude training which forms an integral part of the training of athletes in a number of endurance sports including track and field, distance running, triathlon, cycling and swimming. Atmosphere, the gas and aerosol envelope that extends from the ocean, land, and ice-covered surface of a planet outward into space. Another word for altitude. Altitude or height (also sometimes known as 'depth') is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, atmospheric pressure, and many more). % For more information, see the following related content on ScienceDaily: Content on this website is for information only. Thus, hot air tends to rise and transfer heat upward. • height above sea level: The city of Denver is situated at an altitude of almost exactly one mile. Elevation definition, the height to which something is elevated or to which it rises: The elevation of the tower is 80 feet. [15] The lack of oxygen above 2,400 metres (8,000 ft) can cause serious illnesses such as altitude sickness, high altitude pulmonary edema, and high altitude cerebral edema. Athletes also can take advantage of altitude acclimatization to increase their performance. These regions start and finish at varying heights depending on season and distance from the poles. There is also a general trend of smaller body sizes and lower species richness at high altitudes, likely due to lower oxygen partial pressures. Definition of altitude. Altitude is not a common, day to day word. Convection comes to equilibrium when a parcel of air at a given altitude has the same density as its surroundings. Additional Resources 6. Common uses include aviation (flying, parachuting, gliding), and geography / surveying. [11] The actual lapse rate can vary by altitude and by location. Parties exchanging altitude information must be clear which definition is being used.[1]. As a general definition, altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. Although the term altitude is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage. [29] Birds thrive because of physiological features that are advantageous for high-altitude flight. Find more ways to say altitude, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. As a general definition, altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. A Handbook for Medical Officers", International Civil Aviation Organization, "Association of Elevation, Urbanization and Ambient Temperature with Obesity Prevalence in the United States", "Positive Association between Altitude and Suicide in 2584 U.S. [5][6][7], At high altitude, atmospheric pressure is lower than that at sea level. Learn more. Everywhere else in the world the altitude is measured in metres. In aviation, the term altitude can have several meanings, and is always qualified by explicitly adding a modifier (e.g. 3. [4] The thermosphere and exosphere (along with the higher parts of the mesosphere) are regions of the atmosphere that are conventionally defined as space. This celestial coordinate system divides the sky into two hemispheres: the upper hemisphere, where objects above the horizon are visible, and the lower hemisphere, where objects below the horizon cannot be seen, since the Earth obstructs views of them. Looks at the relationships between altitude, air pressure, density, and their causes. Altitude Definition Altitude Definition The term altitude has different definitions or the meanings with reference to the different kinds of the theories. Jump to navigation Jump to search. Meaning of altitude. [10] ‘If cabin depressurization occurs at altitude and goes above this value, passengers in shirt sleeves will die shortly.’ ‘Kelly wants to develop the Astroliner, a winged rocket towed into the air by a 747 jet and released at altitude to soar on a suborbital trajectory under its own power.’ Mount Everest is 8,850 meters (29,035 feet) tall. altitude noun [C] (HEIGHT) earth science. Solar altitude angle (h): the angle between the horizontal and the line to the Sun (0° ≤ h ≤ 90°). elevation; extent or distance upward; height: The altitude of … As the pressure gets lower, the temperature decreases. If radiation were the only way to transfer heat from the ground to space, the greenhouse effect of gases in the atmosphere would keep the ground at roughly 333 K (60 °C; 140 °F), and the temperature would decay exponentially with height. Views expressed here do not necessarily reflect those of ScienceDaily, its staff, its contributors, or its partners. This is due to two competing physical effects: gravity, which causes the air to be as close as possible to the ground; and the heat content of the air, which causes the molecules to bounce off each other and expand. It is the fall in pressure that leads to a shortage of oxygen (hypoxia) in humans on ascent to high altitude. Latitude is a measurement of location north or south of the Equator. Pressure altitude divided by 100 feet (30 m) is the flight level, and is used above the transition altitude (18,000 feet (5,500 m) in the US, but may be as low as 3,000 feet (910 m) in other jurisdictions); so when the altimeter reads 18,000 ft on the standard pressure setting the aircraft is said to be at "Flight level 180". Definition. In the United States and the UK aviation altitude is usually measured in feet. From the AOPA Archives Pressure Altitude. The term “altitude” can be seen in airplanes, helicopters, space shuttles, rockets and other atmospheric vehicles. ii. 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