54 relations: Adiabatic process, Altimeter, Altitude sickness, Altitude training, Atmosphere of Earth, Atmospheric pressure, Attitude, Cloud, Coffin corner (aerodynamics), Convection, Density altitude, Dew point, Earth, Effects of high altitude on humans, Elevation, Enthalpy of vaporization, Equator, Exosphere, Fédération Aéronautique Internationale, Flight level, Geodetic datum, Geography, Greenhouse effect, Height above ground level, High-altitude cerebral edema, High-altitude pulmonary edema, Inch of mercury, International Civil Aviation Organization, International Standard Atmosphere, Kármán line, Lapse rate, Long jump, Mesosphere, Metres above sea level, Morphology (biology), Organisms at high altitude, Outer space, Oxygen, Partial pressure, Pascal (unit), Phylogenetic tree, Pressure altitude, Productivity (ecology), QNH, Radar altimeter, Radiation, Sea level, Species richness, Stratosphere, Thermosphere, ..., Triple jump, Troposphere, Vertical metre, Visible spectrum. Expand index (4 more) » « Shrink index
In thermodynamics, an adiabatic process is one that occurs without transfer of heat or matter between a thermodynamic system and its surroundings.
An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level.
Altitude sickness, also known as acute mountain sickness (AMS), is a negative health effect of high altitude, caused by acute exposure to low amounts of oxygen at high altitude.
Altitude training is the practice by some endurance athletes of training for several weeks at high altitude, preferably over above sea level, though more commonly at intermediate altitudes due to the shortage of suitable high-altitude locations.
The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.
Atmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth (or that of another planet).
Attitude may refer to.
In meteorology, a cloud is an aerosol consisting of a visible mass of minute liquid droplets, frozen crystals, or other particles suspended in the atmosphere of a planetary body.
Coffin corner (also known as the aerodynamic ceiling or Q corner) is the region of flight where a fast fixed-wing aircraft's stall speed is near the critical Mach number, at a given gross weight and G-force loading.
Convection is the heat transfer due to bulk movement of molecules within fluids such as gases and liquids, including molten rock (rheid).
The density altitude is the altitude relative to standard atmospheric conditions at which the air density would be equal to the indicated air density at the place of observation.
The dew point is the temperature to which air must be cooled to become saturated with water vapor.
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
The effects of high altitude on humans are considerable.
The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface (see Geodetic datum § Vertical datum).
The enthalpy of vaporization, (symbol ∆Hvap) also known as the (latent) heat of vaporization or heat of evaporation, is the amount of energy (enthalpy) that must be added to a liquid substance, to transform a quantity of that substance into a gas.
An equator of a rotating spheroid (such as a planet) is its zeroth circle of latitude (parallel).
The exosphere (ἔξω éxō "outside, external, beyond", σφαῖρα sphaĩra "sphere") is a thin, atmosphere-like volume surrounding a planet or natural satellite where molecules are gravitationally bound to that body, but where the density is too low for them to behave as a gas by colliding with each other.
The Fédération aéronautique internationale (FAI; The World Air Sports Federation), is the world governing body for air sports.
In aviation and aviation meteorology, a flight level (FL) is defined as a vertical altitude at standard pressure, nominally expressed in hundreds of feet.
A geodetic datum or geodetic system is a coordinate system, and a set of reference points, used to locate places on the Earth (or similar objects).
Geography (from Greek γεωγραφία, geographia, literally "earth description") is a field of science devoted to the study of the lands, the features, the inhabitants, and the phenomena of Earth.
The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere.
In aviation, atmospheric sciences and broadcasting, a height above ground level (AGL) is a height measured with respect to the underlying ground surface.
High-altitude cerebral edema (HACE) is a medical condition in which the brain swells with fluid because of the physiological effects of traveling to a high altitude.
High-altitude pulmonary edema (HAPE) (HAPO spelled oedema in British English) is a life-threatening form of non-cardiogenic pulmonary edema (fluid accumulation in the lungs) that occurs in otherwise healthy mountaineers at altitudes typically above.
Inch of mercury (inHg and ″Hg) is a unit of measurement for pressure.
The International Civil Aviation Organization (ICAO Organisation de l'aviation civile internationale, OACI), is a specialized agency of the United Nations.
The International Standard Atmosphere (ISA) is an atmospheric model of how the pressure, temperature, density, and viscosity of the Earth's atmosphere change over a wide range of altitudes or elevations.
The Kármán line, or Karman line, lies at an altitude of above Earth's sea level and commonly represents the boundary between Earth's atmosphere and outer space.
Lapse rate is the rate at which Earth's atmospheric temperature decreases with an increase in altitude, or increases with the decrease in altitude.
The long jump (historically called the broad jump in the USA) is a track and field event in which athletes combine speed, strength and agility in an attempt to leap as far as possible from a take off point.
The mesosphere (from Greek mesos "middle" and sphaira "sphere") is the layer of the Earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.
Metres above mean sea level (MAMSL) or simply metres above sea level (MASL or m a.s.l.) is a standard metric measurement in metres of the elevation or altitude of a location in reference to a historic mean sea level.
Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features.
Organisms can live at high altitude, either on land, in water, or while flying.
Outer space, or just space, is the expanse that exists beyond the Earth and between celestial bodies.
Oxygen is a chemical element with symbol O and atomic number 8.
In a mixture of gases, each gas has a partial pressure which is the hypothetical pressure of that gas if it alone occupied the entire volume of the original mixture at the same temperature.
The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus and ultimate tensile strength.
A phylogenetic tree or evolutionary tree is a branching diagram or "tree" showing the evolutionary relationships among various biological species or other entities—their phylogeny—based upon similarities and differences in their physical or genetic characteristics.
Pressure altitude within the atmosphere is the altitude in the International Standard Atmosphere (ISA) with the same atmospheric pressure as that of the part of the atmosphere in question.
In ecology, productivity refers to the rate of generation of biomass in an ecosystem.
QNH is a Q code indicating the atmospheric pressure adjusted to mean sea level.
A radar altimeter, electronic altimeter, reflection altimeter, radio altimeter (RADALT), low range radio altimeter (LRRA) or simply RA, used on aircraft, measures altitude above the terrain presently beneath an aircraft or spacecraft by timing how long it takes a beam of radio waves to reflect from the ground and return to the plane.
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.
Mean sea level (MSL) (often shortened to sea level) is an average level of the surface of one or more of Earth's oceans from which heights such as elevations may be measured.
Species richness is the number of different species represented in an ecological community, landscape or region.
The stratosphere is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere.
The thermosphere is the layer of the Earth's atmosphere directly above the mesosphere and below the exosphere.
The triple jump, sometimes referred to as the hop, step and jump or the hop, skip and jump, is a track and field event, similar to the long jump.
The troposphere is the lowest layer of Earth's atmosphere, and is also where nearly all weather conditions take place.
A vertical metre is the metric unit used to measure the difference in height between two points on the terrain.
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.