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Concept in thermodynamics
The inversion temperature in thermodynamics and cryogenics is the critical temperature below which a gas that is expanding at constant enthalpy will experience
Inversion_temperature
Deviation from the normal change of an atmospheric property with altitude
meteorology, an inversion (or temperature inversion) is a phenomenon in which a layer of warmer air overlies cooler air. Normally, air temperature gradually
Inversion_(meteorology)
Phenomenon of non-ideal fluids changing temperature
are already at lower temperatures. The temperature at which the JT effect switches algebraic sign is the inversion temperature. The gas-cooling throttling
Joule–Thomson_effect
Edible mixture of glucose and fructose, obtained from sucrose hydrolysis
about 0.15% of the syrup's weight, and inversion time will be about 8 hours. When completed the syrup temperature is raised to inactivate the invertase
Inverted_sugar_syrup
and / or tridymite. These polymorphs also experience temperature-induced inversions. The inversion of cristobalite at 220 °C can be advantageous to achieve
Quartz_inversion
Irreversible thermodynamic process in which a volume of gas expands into a vacuum
temperatures below their inversion temperature gases will cool during Joule expansion, while at higher temperatures they will heat up. The inversion temperature
Joule_expansion
Thermal effect of field emission
E. Henderson. The temperature at which electron emission goes from heating to cooling is called the Nottingham inversion temperature. Notably, the effect
Nottingham_effect
Fluxional process in trigonal-pyramidal molecules
Inversion of ammonia is rapid at room temperature, inverting 30 billion times per second. Three factors contribute to the rapidity of the inversion:
Pyramidal_inversion
Topics referred to by the same term
Look up Inversion or inversion in Wiktionary, the free dictionary. Inversion or inversions may refer to: Inversion (artwork), a 2005 temporary sculpture
Inversion
Elevated inversion layer that caps the part of the atmosphere closest to the ground
condensation occurs as the warm air rises and cools. An inversion occurs when the normal temperature (warm air below, cold air above) profile is reversed
Capping_inversion
Chemical demixing process used in membrane fabrication and emulsion chemistry
Demixing Emulsion Phase inversion temperature Hollow fiber membrane Kools, Willem F. C. (1998). Membrane formation by phase inversion in multicomponent polymer
Phase_inversion_(chemistry)
Flammability Flash point Glass transition temperature Heat of vaporization Inversion temperature Melting point Thermal conductivity Thermal diffusivity Thermal expansion
List_of_materials_properties
When a system has more excited-state members than ground-state
equilibrium; rather, at infinite temperature, the populations N2 and N1 become equal. In other words, a population inversion (N2/N1 > 1) can never exist for
Population_inversion
Particular type of emulsion
or temperature. The water-in-oil emulsion is diluted dropwise with water to an inversion point or gradually cooled to a phase inversion temperature. The
Miniemulsion
Layer of the atmosphere above the troposphere
into oxygen in a cyclical fashion. This temperature inversion is in contrast to the troposphere, where temperature decreases with altitude, and between the
Stratosphere
Air mass forming over a large body of water
water, such as an ocean or large lake, in the presence of a temperature inversion. The inversion itself is usually initiated by the cooling effect caused
Marine_layer
Country in East Asia
causing very cold temperatures, while slopes of mountains are much warmer due to the effects of temperature inversion (temperature increases with altitude)
Mongolia
Archaeological site in Cusco, Peru
displaced from the basin leaving the cold air trapped under a stable inversion. Temperatures in the basins can be several degrees cooler than the surrounding
Moray_(Inca_ruin)
Conversion of an enantiomer to its mirror image
change in the molecule. Chiral inversion happens depending on various factors (viz. biological-, solvent-, light-, temperature- induced, etc.) and the energy
Chiral_inversion
Chemical element with atomic number 2 (He)
at normal ambient temperatures, meaning it heats up when allowed to freely expand. Only below its Joule–Thomson inversion temperature (of about 32 to 50 K
Helium
Optical phenomenon
light bend when they pass through air layers of different temperatures in a steep thermal inversion where an atmospheric duct has formed. In calm weather
Fata_Morgana_(mirage)
Physical quantity that expresses hot and cold in the atmosphere
Atmospheric temperature is a measure of temperature at different levels of the Earth's atmosphere. It is governed by many factors, including incoming
Atmospheric_temperature
Class of chemical compounds
stability of emulsions, on the "water number method" or on the "Phase Inversion Temperature" (PIT) method. The results tend to show that the experimental HLB
Sucrose_esters
Temperature difference per unit of length
or seasonal heating and cooling. One example is an inversion, a situation in which the temperature at ground level is colder than higher up in the atmosphere
Temperature_gradient
Accumulation of cold air in a topographic depression
terrain until a change of air mass or daytime heating breaks the temperature inversion. Since the cold-air pool can persist for long periods, it leads
Cold-air_pool
Sound produced by lightning
distance in non-inversion conditions. In a temperature inversion, the air near the ground is cooler than the air higher up. Inversions often happen when
Thunder
Short-term state of the atmosphere
atmosphere at a specific place and time, typically described in terms of temperature, humidity, cloud cover, and stability. On Earth, most weather phenomena
Weather
Physical systems hotter than any other
negative- to the positive-temperature system. A standard example of such a system is population inversion in laser physics. Temperature is also related to how
Negative_temperature
Gas equation of state which accounts for non-ideal gas behavior
Engineering Applications 2nd Edition. NY: Springer. Gas laws Ideal gas Inversion temperature Iteration Maxwell construction Real gas Theorem of corresponding
Van_der_Waals_equation
as it exhibits two temperature inversions, i.e. regions where the atmosphere gets warmer with increasing altitude. These inversions take place in the stratosphere
Skin_temperature_(atmosphere)
Electromagnetic propagation in relation to the troposphere
as does the surface temperature, but at different rates. This produces a boundary or temperature gradient, which allows an inversion level to form – a similar
Tropospheric_propagation
Optical illusion caused by bending of light
it. This unusual arrangement is called a temperature inversion. During the daytime, the normal temperature gradient of the atmosphere is cold air above
Mirage
California weather pattern
nighttime, when coastal temperatures die down, there can be a sharp temperature difference with elevation. Temperature inversions are common in Southern
Sundowner_winds
Empirical algebraic equation of state more precise than the Van der Waals equation
to the Peng–Robinson equation when ω = 1/3. Gas laws Ideal gas Inversion temperature Iteration Maxwell construction Real gas Theorem of corresponding
Redlich–Kwong equation of state
Redlich–Kwong_equation_of_state
Process in organic chemistry
In organic chemistry, a ring flip (also known as a ring inversion or ring reversal) is the interconversion of cyclic conformers that have equivalent ring
Ring_flip
Radio propagation due to unusual conditions
with time. After sunrise, the inversion disappears gradually and the area diminishes correspondingly. Inversion of temperature exists too ahead of warm fronts
Anomalous_propagation
state during the winter. Temperatures rarely fall below 0 °F (−18 °C), but frequently stay below freezing. Temperature inversions during winter can lead
Climate_of_Salt_Lake_City
Type of field-effect transistor
through the oxide and creates an inversion layer or channel at the semiconductor-insulator interface. The inversion layer provides a channel through which
MOSFET
Vertical rate of change of temperature in atmosphere
idealized ISA, the temperature of the actual atmosphere does not always fall at a uniform rate with height. For example, there can be an inversion layer in which
Lapse_rate
Time of night associated with supernatural events
designation of 3:00 am as the "devil's hour" is often attributed to a mocking inversion of the time when Jesus Christ was believed to have died, which is traditionally
Witching_hour
Metamorphic process
Perhaps the most pervasive example of inversion occurs on carbon. The inversion of carbon, depending on the temperature and pressure of the environment, results
Neomorphism
Polystyrene in drug delivery
create emulsion, Canal et al. used a unique method known as phase inversion temperature (PIT). PIT utilizes phase transitions to produce highly concentrated
Polystyrene_(drug_delivery)
State of low temperature
presence of low temperature, especially in the atmosphere. In common usage, cold is often a subjective perception. A lower bound to temperature is absolute
Cold
feature of the Pacific High) is caused by a temperature inversion embedded in the moving trade wind air. The inversion tends to suppress the vertical movement
Climate_of_Hawaii
Distinct layer of temperature change in a body of water
thermal layer or the metalimnion in lakes) is a distinct layer based on temperature within a large body of fluid (e.g. water, as in an ocean or lake; or
Thermocline
Meteorological phenomenon
place by the poleward high-pressure system. This temperature profile, known as a temperature inversion, will lead to the development of drizzle, rain,
Cold-air_damming
Lowest layer of Earth's atmosphere
such, because the tropopause is an inversion layer in which air-temperature increases with altitude, the temperature of the tropopause remains constant
Troposphere
Difference in wind speed or direction over a short distance
low-level winds referred to as low-level jets, near mountains, radiation inversions that occur due to clear skies and calm winds, buildings, wind turbines
Wind_shear
Electronic oscillator circuit
573 °C at 1 atmosphere (and at higher temperatures and higher pressures) the α-quartz undergoes quartz inversion, transforms reversibly to β-quartz. The
Crystal_oscillator
Variety of cloud
United States, when the surface temperature is still relatively cool. The wavy strips of clouds are generally near an inversion surface. Also referred to as
Altostratus_undulatus_cloud
scattering problem Inverse scattering transform Inverse temperature Inversion temperature Inversion transformation Inverted microscope Inverted pendulum
Index_of_physics_articles_(I)
Interpretation of seismic data using linear model
in the results of the inversion algorithm. Source: We start with an example to invert for earth parameter values from temperature depth distribution in
Linear_seismic_inversion
U.S. Capital flying saucer incidents on consecutive weekends
Menzel proposed flying saucers were optical mirages created by temperature inversions. American papers covered similar statements from French astronomer
1952 Washington, D.C., UFO incident
1952_Washington,_D.C.,_UFO_incident
Gas layer surrounding Earth
nearby atmosphere to the cooler ground, it creates a temperature inversion where the local temperature increases with altitude up to around 1,000 m. Because
Atmosphere_of_Earth
City in Alaska, United States
hills to the north, and the city experiences one of the biggest temperature inversions on Earth. Fairbanks is home to the University of Alaska Fairbanks
Fairbanks,_Alaska
Atmospheric heat retention
over parts of Antarctica. In a location where there is a strong temperature inversion, so that the air is warmer than the surface, it is possible for
Greenhouse_effect
Formula for temperature dependence of rates of chemical reactions
In physical chemistry, the Arrhenius equation is a formula for the temperature dependence of reaction rates. In 1889 while working with Wilhelm Ostwald
Arrhenius_equation
Weather phenomenon in coastal California
air is at a minimum temperature and the temperature difference in the inversion layer is at its maximum. The air beneath the inversion base being at its
June_Gloom
Medical imaging technique
al. "Fluid attenuation inversion recoveryg". radiopaedia.org. Retrieved 2015-12-03. Di Muzio B, Abd Rabou A. "Double inversion recovery sequence". Radiopaedia
Magnetic_resonance_imaging
Thought experiment
perceptions are the same, and no physical or behavioral test can reveal the inversion. Critics of functionalism, and of physicalism more broadly, argue that
Inverted_spectrum
Process of calculating the causal factors that produced a set of observations
inverse problem in the 1D wave equation. But it rapidly turned out that the inversion is an unstable process: noise and errors can be tremendously amplified
Inverse_problem
Materials which exhibit ferromagnetism, ferroelectricity, and/or ferroelasticity
magnetic ordering breaks the inversion symmetry and directly "causes" the ferroelectricity. In this case the ordering temperatures for the two phenomena are
Multiferroics
Molecules whose atoms interchange between symmetric positions
said to be semi-rigid. Longuet-Higgins introduced the use of permutation-inversion groups for the symmetry classification of the states of fluxional (or
Fluxional_molecule
Property of a thermodynamic system
reservoirs over Carnot cycle is zero too, since the inversion of a heat transfer direction means a sign inversion for the heat transferred during isothermal stages:
Entropy
Polymer showing drastic changes in physical properties with temperature
LCST. Thus, upon temperature change the roles of the soluble and insoluble polymer blocks are reversed and this structural inversion is typically called
Temperature-responsive polymer
Temperature-responsive_polymer
Topics referred to by the same term
over the surface of a large body of water in the presence of a temperature inversion Sea Fog, a 2014 South Korean film Abyssal Spider (simplified Chinese:
Sea_fog
Atmospheric phenomenon
air temperature to fall and be cooler than the air immediately above it, a condition known as an inversion. When the air underneath the inversion layer
Fog
Natural sinkhole in Utah, United States
Wasatch-Cache National Forest. Due to temperature inversions that trap cold nighttime air, it routinely produces the lowest temperatures in the contiguous United States
Peter_Sinks
Equatorial east-to-west prevailing winds
of temperature with height is known as a temperature inversion. When it occurs within a trade wind regime, it is known as a trade wind inversion. The
Trade_winds
surface temperatures are relatively low due to the upwelling of cooler, deeper water. As a result of the low-lying inversion and cool water temperature, moisture
Trade_wind_cumulus_cloud
Term
regions. Surface temperature inversion is typical of polar environments and leads to the katabatic wind phenomenon. The vertical temperature structure of
Polar_meteorology
Change of direction of propagation due to variation of velocity
towards the ground. The same holds if the temperature is increasing with height (inversion). If the temperature is decreasing with height and the wind speed
Refraction_(sound)
Molecular Inversion Probe (MIP) belongs to the class of Capture by Circularization molecular techniques for performing genomic partitioning, a process
Molecular_Inversion_Probe
Distribution of air pollution into Earth's atmosphere
atmospheric layers may form in which the temperature increases with increasing altitude. Such layers are called inversion layers. When such a layer forms at
Outline of air pollution dispersion
Outline_of_air_pollution_dispersion
Sub-Neptune orbiting the red dwarf K2-18
on the planet's properties. Most computer models expect that a temperature inversion will form at high elevation, yielding a stratosphere. High-energy
K2-18b
Differentiating positive and negative zero
temperatures to describe systems with population inversion, which can be considered to have a temperature greater than positive infinity, because the coefficient
Signed_zero
Chemical compound
Ge powders at a pressure of 4 GPa and a temperature of 800–1000 °C for 1 to 3 hours. They have no inversion center, and are therefore helical, with right-hand
Cobalt_germanide
Preserved physical characteristics allowing reconstruction of past climatic conditions
mostly reflects the temperature where precipitation occurs. Taking into account that the precipitation forms above the inversion layer, we are left with
Proxy_(climate)
change. Blossite is also formed when the fumarole temperatures are lower than inversion temperatures of 710 °C (1,310 °F). Blossite is part of the copper
Blossite
with centres above Western Europe produce cold inversion fog with no change in day and nighttime temperatures, they stay around or a bit under 0 °C. The fog
Climate_of_Budapest
Laser cooling technique
therefore the kinetic energy of the atom, will be reduced. Since the temperature of an ensemble of atoms is a measure of the random internal kinetic energy
Doppler_cooling
Major Pennsylvania air pollution incident
Works and its American Steel & Wire plant during an atmospheric temperature inversion. It killed 20 people and caused respiratory problems for 6,000 of
1948_Donora_smog
Edge of the habitat at which trees are capable of growing
Hawaii's tree line of about 7,900–9,500 ft (2,400–2,900 m) is above a temperature inversion which blocks moisture from reaching the highest slopes. The Arctic
Tree_line
Cloud species
clouds, which block some of the heat from the sun and thus create an inversion, causing any cumuliform clouds to flatten and become cumulus humilis.
Cumulus_humilis_cloud
Layer of gases surrounding an astronomical body held by gravity
the stratosphere, which is a region of temperature increasing with altitude, creating a temperature inversion. This region contains the UV-absorbing ozone
Atmosphere
Process that leads to chemical changes
set of geometric isomers (cis/trans). In contrast, a reversal (Walden inversion) of the previously existing stereochemistry is observed in the SN2 mechanism
Chemical_reaction
Type of low cloud common over subtropical oceans
cool ocean surface lowers the temperature of the air directly above it, often producing a strong temperature inversion at the top of the marine boundary
Marine_stratocumulus
Device that emits light via optical amplification
population inversion. In 1955, Prokhorov and Basov suggested optical pumping of a multi-level system as a method for obtaining the population inversion, later
Laser
Mineral, silver sulfide
(343 °F). Argentite is the stable form above that temperature. As argentite cools below that temperature its cubic form is distorted to the monoclinic form
Acanthite
Warm, dry wind in North America
prevent the usual nocturnal temperature inversion from forming on the lee side of the slope, allowing night-time temperatures to remain elevated. Quite
Chinook_wind
Geometric property of some molecules and ions
enantiomeric pyramidal conformers rapidly undergo pyramidal inversion. However, if the temperature in question is low enough, the process that interconverts
Chirality_(chemistry)
Reaction in organic chemistry
95% yield. The reaction is conducted in refluxing dioxane, at which temperature, the sodium is liquid. Although the Wurtz reaction is only of limited
Wurtz_reaction
Horizontal layer that propagates electromagnetic radiation
radar system based on atmospheric ducting) Sky wave Thermal fade Temperature inversion Tropospheric ducting Thomas, Michael Frederic (2006). Optical propagation
Atmospheric_duct
Natural layering of ecosystems by elevation
occurs at distinct elevations due to varying environmental conditions. Temperature, humidity, soil composition, and solar radiation are important factors
Altitudinal_zonation
Process of browning of sugar
types of reactions: equilibration of anomeric and ring forms sucrose inversion to fructose and glucose condensation reactions intramolecular bonding
Caramelization
Class of instruments
number density. Even with the additional measurements, the inversion to obtain temperature is significantly more complicated than traditional DIAL techniques
Atmospheric_lidar
and a populated area with the most extreme temperature fluctuations. In this area, temperature inversions are constantly forming in winter due to the
Climate_of_Verkhoyansk
Technology for constructing integrated circuits
transistor technology, patented an insulated-gate transistor (IGFET) with an inversion layer. Bardeen's concept forms the basis of CMOS technology today. The
CMOS
Chemical process intended to reverse the polarity of a molecular functional group
In organic chemistry, umpolung (German: [ˈʔʊmˌpoːlʊŋ]) or polarity inversion is the chemical modification of a functional group with the aim of the reversal
Umpolung
Supposed celestial phenomenon in the Holy Roman Empire
manner that does not contradict Catholic teachings. ...a sudden temperature inversion must have taken place. The cold and warm air masses could conceivably
1561 celestial phenomenon over Nuremberg
1561_celestial_phenomenon_over_Nuremberg
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