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Topic: Adiabatic lapse rate

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Dry adiabatic lapse rate

Adiabatic lapse

Environmental lapse rate

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	Adiabatic lapse rate Summary
		The atmospheric lapse rate, combined with adiabatic cooling and heating of air related to the expansion and compression of atmospheric gases, present a unified model explaining the cooling of air as it moves aloft and the heating of air as it descends downslope.
		The adiabatic lapse rate is the rate of temperature change that occurs in an atmosphere as a function of elevation, assuming that air behaves adiabatically (thermally insulated).
		In general, a lapse rate is the rate at which an atmospheric variable (usually temperature) decreases with altitude.
	www.bookrags.com /Adiabatic_lapse_rate (2018 words)

	Adiabatic lapse rate - Definition, explanation
		An adiabatic lapse rate is the rate at which the temperature of a fluid changes when it is subjected to changes in pressure.
		Adiabatic lapse rate is used as an analytic device usually with reference to Earth's atmosphere.
		Adiabatic lapse rate is measured in unitss of temperature divided by altitude - common units are °C per 1,000 feet or per 1,000 m.
	www.calsky.com /lexikon/en/txt/a/ad/adiabatic_lapse_rate.php (176 words)

	Adiabatic process - Wikipedia, the free encyclopedia
		Another example is the adiabatic flame temperature, which is the temperature that would be achieved by a flame in the absence of heat loss to the surroundings.
		Adiabatic heating and cooling are processes that commonly occur due to a change in the pressure of a gas.
		If adiabats and isotherms are graphed severally at regular changes of entropy and temperature, respectively (like altitude on a contour map), then as the eye moves towards the axes (towards the south-west), it sees the density of isotherms stay constant, but it sees the density of adiabats grow.
	en.wikipedia.org /wiki/Adiabatic_process (963 words)

	Adiabatic Processes
		This rate of temperature change of unsaturated air with changing altitude is called the dry adiabatic lapse rate: the rate of change of the temperature of rising or subsiding air when no condensation is taking place (we'll talk about the condensation part shortly).
		The rate of temperature change as you rise in still air is not as great as the rate of change of rising air; that is, the air parcel does not cool off as fast.
		This is called the Saturated adiabatic lapse rate (or the wet adiabatic lapse rate, or the moist adiabatic lapse rate, depending on the textbook you are using).
	daphne.palomar.edu /jthorngren/adiabatic_processes.htm (1264 words)

	Lapse rate - Wikipedia, the free encyclopedia
		The lapse rate is defined as the rate of change in temperature with height observed while moving upwards through an atmosphere.
		The varying environmental lapse rates throughout the earth's atmosphere are of critical importance in meteorology.
		Charts of the environmental lapse rate are known as tephigrams.
	en.wikipedia.org /wiki/Adiabatic_lapse_rate (978 words)

	Science Fair Projects - Adiabatic lapse rate
		An adiabatic lapse rate is the rate at which a the temperature of a fluid changes when it is subjected to changes in pressure.
		Adiabatic lapse rate is used as an analytic device usually with reference to Earth's atmosphere.
		Adiabatic lapse rate is measured in units of temperature divided by altitude - a common unit is °C per 1000 feet.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Adiabatic_lapse_rate (294 words)

	Adiabatic
		Adiabatic processes are processes which occur without gain or loss of heat in the working fluid.
		The first rate is used to describe the temperature of the surrounding air that the rising air is passing through, and the second and third rates are in reference to a parcel of air that is rising through the atmosphere.
		The dry adabatic lapse rate applies to air which is below its dew point, ie which is not saturated by water vapor, whereas the wet adabatic lapse rate applies to air which has reached its dew point.
	www.ebroadcast.com.au /lookup/encyclopedia/ad/Adiabatic.html (292 words)

	LAPSE RATE
		The dry adiabatic lapse rate is about 5.5 degrees F per 1000 feet, and the wet adiabatic lapse rate varies between 2 and 5 degrees F per 1000 feet.
		A steep lapse rate implies a rapid decrease in temperature with height (a sign of instability) and a steepening lapse rate implies that destabilization is occurring.
		nedves adiabatikus gradiens (moist adiabatic lapse rate), harmatpont gradiens (dew-point lapse rate), hõmérsékleti gradiens (temperature lapse rate), adiabatikus hõmérsékleti gradiens (adiabatic lapse rate).
	www.websters-online-dictionary.org /definition/english/La/Lapse+Rate.html (462 words)

	Glossary — Department of Meteorology
		Adiabat: a line on a thermodynamic chart relating the pressure and temperature of a substance (such as air) that is undergoing a transformation in which no heat is exchanged with its environment.
		Adiabatic lapse rate: the rate of decrease of temperature experienced by a parcel of air when it is lifted in the atmosphere under the restriction that it cannot exchange heat with its environment.
		Lapse rate: the rate of decrease of air temperature with increase of elevation.
	www.met.utah.edu /Members/whiteman/Glossary.html (11129 words)

	* Dry Adiabatic Lapse Rate - (Meteorology): Definition
		Dry adiabatic lapse rate - the rate at which the temperature of a parcel of dry air decreases as the parcel is lifted in the atmosphere.
		The rate at which the temperature of dry (unsaturated) air changes as it is raised or lowered adiabatically through the atmosphere.
		Dry adiabatic lapse rate: the rate (5.4°F per 1000 ft or 9.8°C per km) at which the temperature of a parcel of dry air decreases as the parcel is lifted, under the assumption that no heat is exchanged with its environment.
	en.mimi.hu /meteorology/dry_adiabatic_lapse_rate.html (462 words)

	Skew-T Log-P Diagram: Dry Adiabats
		Adiabats on a Skew-T Log-P diagram are used most frequently to determine how stable the atmosphere is. They are also used to determine how a parcel of air will behave at various altitudes in the atmosphere.
		As the parcel is forced upwards, it cools at a moist adiabatic lapse rate (less rapidly with height than dry adiabatically) and causes precipitation on the windward side of the mountains.
		Note that the profile of the atmosphere is dry adiabatic at two relatively thick levels in the atmosphere at 0Z on July 1, 2005, while, the atmosphere is dry adiabatic for a small layer near the surface on at 0Z on December 1, 2005.
	www.personal.psu.edu /smd293/meteo482/dryadiabats.html (1597 words)

	physics - Adiabatic lapse
		Adiabatic lapse is the temperature change that occurs in a fluid as it is adiabatically expanded or compressed.
		The relationship between change in altitude and change in temperature is measured as the adiabatic lapse rate, given in units of temperature divided by units of altitude (ex.
		The adiabatic lapse rate is of critical importance in meteorology.
	www.physicsdaily.com /physics/Adiabatic_lapse (359 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		The lapse rate is defined as the negative of the rate of change in an atmospheric variable, usually temperature, with height observed while moving upwards through an atmosphere.
		The dry adiabatic lapse rate (DALR) is the negative of the rate at which a rising parcel of unsaturated air, such as a thermal, changes temperature with increasing height.
		The varying environmental lapse rates throughout the earth's atmosphere are of critical importance in meteorology, particularly within the troposphere.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=adiabatic_lapse_rate (1100 words)

	Adiabatic lapse rate (Site not responding. Last check: )
		The Adiabatic lapse rate is the rate of temperature change that occurs in an atmosphere as a function of elevation, assuming that air behaves adiabatically.
		In general, a lapse rate is the rate at which an atmospheric variable (usually temperature) decreases with altitude.
		If the environmental lapse rate is between the moist and dry adiabatic lapse rates, the air is conditionally stable -- an unsaturated parcel of air does not have sufficient buoyancy to rise to the lifting condensation level, but once it gets there, it will gain buoyancy within the cloud.
	www.punweb.com /article/Absolute_Stable_Air (908 words)

	SUPERADIABATIC LAPSE RATE
		A super-adiabatic lapse rate is usually caused by intense solar heating at the surface.
		A super-adiabatic lapse rate is common in the Southwest U.S. in the summer, but can occur in most regions of the U.S. in the summer when the skies are clear (maximum insolation), wind speeds are low (limited vertical mixing) and soils are dry (no evaporational cooling).
		Whether a super-adiabatic lapse rate at the surface leads to precipitation is a function of the moisture content of the air, the cap strength, trigger mechanisms, and upper level forcing mechanisms, etc. A super-adiabatic lapse rate in the middle and upper troposphere is rare.
	www.theweatherprediction.com /habyhints/31 (299 words)

	Subsidence Inversions - Harold F. Maybeck
		If the lapse rate within the inversion layer indicates a temperature increase with increase in altitude of more than 2 or 3 degrees Fahrenheit per one thousand feet, then the inversion is steep enough to indicate very stable air within the inversion layer.
		A decrease in the ascent rate is an indication that the aerostat has entered the bottom of an inversion layer, and the subsequent increase in the ascent rate again, indicates that the balloon has now passed through the top of the inversion layer.
		In meteorology, a lapse rate of temperature, defined as the rate of decrease of temperature with height of a parcel of air lifted adiabatically through an atmosphere in "hydrostatic equilibrium".
	www.maybeck.com /inversions (2575 words)

	Gliding Magazine \| Features (Site not responding. Last check: )
		This is known as the Dry Adiabatic Lapse Rate (DALR).
		Adiabatic means that the process takes place without exchanging heat with the environment outside.
		Lapse Rate is the term for the decrease of temperature with height.
	www.glidingmagazine.com /ListFeatureArticleDtl.asp?id=151 (1300 words)

	SATURATION-ADIABATIC LAPSE RATE
		A special case of process lapse rate, defined as the rate of decrease of temperature with height of an air parcel lifted in a saturation-adiabatic process through an atmosphere in hydrostatic equilibrium.
		Also called moist-adiabatic lapse rate.Owing to the release of latent heat, this lapse rate is less than the dry-adiabatic lapse rate, and the differential equation representing the process must be integrated numerically.
		Wet-bulb potential temperature is constant with height in an atmosphere with this lapse rate.
	www.websters-dictionary-online.net /definition/english/sa/saturation-adiabatic+lapse+rate.html (221 words)

	AOS 3 Lecture Screens (Site not responding. Last check: )
		The moist adiabatic lapse rate is used to describe the temperature of a moving parcel when it is saturated.
		The adiabatic lapse rates refer to temperature inside an air parcel that is rising or sinking.
		An average environmental lapse rate for the troposphere is 6.5C/km (which is suspiciously close to the average moist adiabatic lapse rate for parcels).
	www.atmos.ucla.edu /as3/scrns/clouddev/Note07.html (351 words)

	Pathfinder 201 - Hydrostatic Equation, Adiabatic Lapse Rate, and Orographic Climatic Processes
		Interestingly, the lapse rate for moist air is less than the dry adiabatic rate because condensation from vapor to liquid or solid forms of water adds heat to the the atmosphere and modulates the rate of decrease of temperature with increasing altitude.
		The heat provided by condensation of water lowers the rate of decline of temperature with increasing elevation relative to the dry adiabat.
		In addition to following a wet adiabatic lapse rate on the windward side of a mountain, when the air descends over the leeward side it begins its descent with relatively dry air at a warmer temperature that it would have had if it had followed a dry adiabat.
	wufs.wustl.edu /pathfinder/path201/notes/notes_09_19_06.htm (1476 words)

	Met Office: Lapse rates
		This fall of temperature is known as the Lapse Rate and, in this case, is a characteristic of the atmosphere around.
		Consequently, although the temperature almost always falls with height, the rate of fall varies, depending on the characteristics of the atmosphere.
		This is known as the Environmental Lapse Rate (ELR) and, on the average, it is about 6.5 °C per 1000 metres, though it varies a lot.
	www.metoffice.gov.uk /education/higher/lapse_rates.html (1411 words)

	adiabatic cooling and clouds (Site not responding. Last check: )
		Adiabatic cooling deals with the cooling of parcels of air as they rise, or are forced up, through the atmosphere.
		The first is the ambient atmosphere lapse rate which is the rate that air cools as one goes up in altitude.
		The first rate is used to describe the temperature of the surrounding air that the rising air is passing through.
	ellerbruch.nmu.edu /cs255/mboutell/cloudadiabatic.html (219 words)

	Lecture 9 (Site not responding. Last check: )
		The term "adiabatic" refers to the idealized situation that no energy enters or leaves the parcel except through the expansion itself so that conduction, radiation and mixing of surrounding air can be ignored.
		The surrounding air is also (usually) cooler at higher altitudes (typical lapse rate 6.5 C per km, but the lapse rate may be larger or smaller).
		The wet adiabatic lapse rate is smallest in warm moist air since lots of latent heat is released.
	www-unix.oit.umass.edu /~astro105/Lecture_Notes/Lecture9_04.htm (885 words)

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