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	Adiabatic lapse rate - Wikipedia, the free encyclopedia
		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.
		Meteorologists use radiosondes to measure the environmental lapse rate and compare it to the predicted adiabatic lapse rate to forecast the likelihood that air will rise, known as the 'stability' of the air.
	en.wikipedia.org /wiki/Dry_adiabatic_lapse_rate (757 words)

	Department of Meteorology University of Utah - Glossary
		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.
		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.
	www.met.utah.edu /Members/whiteman/Glossary.html (11142 words)

	Adiabatic process biography .ms (Site not responding. Last check: 2007-09-11)
		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.
		The dry adiabatic lapse rate applies to air which is below its dew point, ie which is not saturated by water vapor, whereas the wet adiabatic lapse rate applies to air which has reached its dew point.
	adiabatic.biography.ms (906 words)

	Lapse
		Dry adiabatic lapse rate The dry adiabatic lapse rate is the rate at which the atmosphere.
		Lapse rate The lapse rate is the rate at which an atmospheric variable (usually altitude.
		Moist adiabatic lapse rate The moist adiabatic lapse rate is the rate at which the pressure.
	www.brainyencyclopedia.com /topics/lapse.html (105 words)

	Environmental Lapse - (Site not responding. Last check: 2007-09-11)
		The environmental lapse rate is the average decrease in temperature with an increase in altitude.
		Doctrine of lapse The Doctrine of Lapse was an subcontinent...
		and significance of the average environmental temperature lapse of the troposphere that is 6.5...
	environmental.fazs.com /index.php?k=environmental-lapse (754 words)

	Adiabatic lapse rate -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-09-11)
		Adiabatic lapse rate is used as an analytic device usually with reference to (Click link for more info and facts about Earth's atmosphere) Earth's atmosphere.
		Adiabatic lapse rate varies with the air's moisture content.
		Dry adiabatic lapse rate (DALR) occurs when the (Wetness in the atmosphere) humidity is low, and is a constant 2.98 °C/1000ft (9.78 °C/ (A metric unit of length equal to 1000 meters (or 0.621371 miles)) km).
	www.absoluteastronomy.com /encyclopedia/A/Ad/Adiabatic_lapse_rate.htm (177 words)

	SUPERADIABATIC LAPSE RATE (Site not responding. Last check: 2007-09-11)
		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.
		With a downsloping wind, air is warmed at the dry adiabatic lapse rate as it sinks.
	www.theweatherprediction.com /habyhints/31 (299 words)

	lec05
		A saturated adiabatic process (sometimes called a moist adiabatic process or pseudo adiabatic processes) is an adiabatic process in which the system becomes saturated and latent heat is released or absorbed by the water molecules, thus offsetting the dry adiabatic temperature changes.
		The lower value of the moist adiabatic rate, compared to the dry adiabatic rate, is due to the release of latent heat during the condensation process.
		A layer of atmosphere is conditionally unstable when the atmosphere's environmental lapse rate falls in between the dry adiabatic lapse rate and the saturated adiabatic lapse rate.
	www.borg.com /~glenn/umuc/170/lec05/lec05.htm (1308 words)

	Determining Stability (Site not responding. Last check: 2007-09-11)
		The lapse rate for a parcel undergoing condensation is called the moist adiabatic lapse rate (M.A.L.R.).
		The moist adiabatic lapse rate is not constant since it varies strongly with temperature.
		The environmental lapse is the change in temperature with height measured by a weather balloon carrying a package of weather measuring instruments called a radiosonde.
	www.cimms.ou.edu /~cortinas/1014/l14_2.html (461 words)

	stability
		By noting the environmental lapse rate and comparing the temperature of a rising parcel to the temperature of the environment at the same level, we can determine whether the atmosphere is absolutely stable, absolutely unstable, or conditionally unstable.
		Hence, the condition of conditional instability is whether the air parcel is cooling/heating at the moist adiabatic lapse rate, or the dry adiabatic lapse rate.
		Air being mixed vertically in an unsaturated layer will cool (as it rises) and warm (as it is lowered) at the dry adiabatic lapse rate, with the net effect of the mixing being to make the lapse rate of the entire layer tend towards the dry adiabatic lapse rate.
	www.meteor.wisc.edu /~aos100-2/stability (2147 words)

	b03-lect3 (Site not responding. Last check: 2007-09-11)
		Adiabatic process: A change in temperature arising solely from compression and expansion of an air parcel with no interchange of heat with its surroundings.
		Neutral stability occurs when the environmental lapse rate is equal to dry adiabatic lapse rate for unsaturated air or the moist adiabatic lapse rate for saturated air.
		Conditional instability occurs whenever the environmental lapse rate is between the moist adiabatic lapse rate and the dry adiabatic lapse rate.
	darya.scar.utoronto.ca /~gough/eesb03s/b03-lect3.htm (474 words)

	Adiabatic
		Adiabatic index The adiabatic index of a volume (c Kappa can also refer to several other things, but it can usually be d...
		Adiabatic process An adiabatic process is a process in which no heat transfer from the environment.
		Adiabatic theorem The adiabatic theorem is of major importance in quantum field theory.
	www.brainyencyclopedia.com /topics/adiabatic.html (94 words)

	Adiabatic Processes
		This is called adiabatic heating and cooling, and the term adiabatic implies a change in temperature of the parcel of air without gain or loss of heat from outside the air parcel.
		Adiabatic processes are very important in the atmosphere, and adiabatic cooling of rising air is the dominant cause of cloud formation.
		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)

	BMET 2000: Atmospheric Stability & Clouds
		It is critical to understand the difference between the lapse rates for a rising parcel and those of the surrounding environment.
		In the first example, suppose that the actual lapse rate or rate of temperature change with height in the free atmosphere is exactly equal to the dry adiabatic rate.
		If we assume a moist adiabatic rate of about 6 C/km, then the temperature at the top will be 4 C. By definition, the dew point must also be 4 C. During the descent on the other side, the air immediately becomes unsaturated.
	psb.usu.edu /courses/bmet2000/stability.html (1955 words)

	AtmoSphere - pages/lapseratesalevel.html (Site not responding. Last check: 2007-09-11)
		The rate at which the parcel cools, the DALR (dry adiabatic lapse rate), stays constant at 9.8 c per 1000m.
		The dry adiabatic lapse rate only applies when the relative humidity is less than 1000%.
		The SALR (saturated adiabatic lapse rate) range from 4 C per 1000m to as high as 9 C per 1000m.
	atschool.eduweb.co.uk /kingworc/departments/geography/nottingham/atmosphere/pages/lapseratesalevel.html (458 words)

	ESCI 107 – The Atmosphere (Site not responding. Last check: 2007-09-11)
		The rate at which a saturated parcel cools as it is lifted is called the wet adiabatic lapse rate or moist adiabatic lapse rate.
		The adiabatic cooling of air is the primary means by which clouds are formed in the atmosphere.
		Stability is determined by comparing the environmental lapse rate with the dry and moist adiabatic lapse rates.
	snowball.millersv.edu /~adecaria/ESCI107/esci107_lesson05_stability.html (772 words)

	adiabatic cooling and clouds (Site not responding. Last check: 2007-09-11)
		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 best illustration of adiabatic cooling is as a parcel of air is being forced over a land formation, such as a mountain.
	ellerbruch.nmu.edu /cs255/mboutell/cloudadiabatic.html (219 words)

	The adiabatic atmosphere
		The adiabatic lapse rate is only observed when the humidity is low.
		On the other hand, if the atmospheric lapse rate exceeds the adiabatic value then, after rising a little way, the packet will be less dense than its immediate surroundings, and will, therefore, continue to rise due to buoyancy effects.
		Occasionally, however, the lapse rate exceeds the adiabatic value, and this is always associated with extremely disturbed weather patterns.
	farside.ph.utexas.edu /teaching/sm1/lectures/node56.html (1229 words)

	GG3069 Lapse rates
		The word 'adiabatic' is derived from the Greek word for 'impassable', and it refers to a system which does lose or gain energy.
		Adiabatic Lapse Rates are commonly different to the real vertical change in temperature, known as the Environmental Lapse Rate (ELR).
		Lines representing the environmental lapse rate can thus be compared at a glance with the gradient of the dry and saturated adiabats, thus providing a rapid impression of air stability at all levels of the atmosphere.
	www.st-andrews.ac.uk /~dib2/climate/lapserates.html (2445 words)

	NWS Louisville: Convective Parameters and Indices (Site not responding. Last check: 2007-09-11)
		The K index is a measure of thunderstorm potential based on the vertical temperature lapse rate, and the amount and vertical extent of low-level moisture in the atmosphere.
		The SI is calculated by lifting a parcel dry adiabatically from 850 mb to its LCL, then moist adiabatically to 500 mb, and comparing the parcel versus environmental 500 mb temperatures similar to the LI.
		CAPE is the positive area on a sounding between the parcel's assumed ascent along a moist adiabat and the environmental temperature curve from the level of free convection (LFC) to the equilibrium level (EL).
	www.crh.noaa.gov /lmk/soo/docu/indices.htm (4500 words)

	Session 6: Conditional Instability (Site not responding. Last check: 2007-09-11)
		In our previous discussions, to determine stability, we compared the environmental lapse rate to either the dry or the saturated adiabatic lapse rates, whichever was appropriate to the layer in question.
		To determine if the atmosphere is conditionally unstable, we compare the lapse rate of a parcel to the environment as it passes through the LCL.
		The atmosphere is described as conditionally unstable if the environmental lapse rate is less than the dry adiabatic lapse rate beneath the LCL and greater than the saturated adiabatic lapse above the LCL.
	san.hufs.ac.kr /~gwlee/session6/conditional.html (378 words)

	Dry adiabatic lapse rate (Site not responding. Last check: 2007-09-11)
		The dry adiabatic lapse rate is the rate at which the temperature of a parcel of dry air decreases as the parcel is lifted in the atmosphere.
		The dry adiabatic lapse rate (abbreviated DALR) is 5.5°F per 1000 ft or 9.8°C per km.
		National Science Digital Library - Dry adiabatic lapse rate
	www.encyclopedia-1.com /d/dr/dry_adiabatic_lapse_rate.html (65 words)

	Lab 5:Stability,Clouds,Precip.htm
		To use the dry adiabatic lapse rate, the air parcel temperature must be greater than the dew point (air parcel is unsaturated).
		To use the moist adiabatic lapse rate, the air parcel temperature must be equal to the dew point.
		This concept of the adiabatic cooling/ warming of a lifted/sinking parcel of air and then comparing the lifted/lowered parcel with the surrounding environmental air is the essence of all of the methods for evaluating atmospheric thermal stability.
	www.meso.com /wind-personal/glenn/171/lab05/lab05.htm (5843 words)

	Welcome to Adobe GoLive 5 (Site not responding. Last check: 2007-09-11)
		Moist adiabatic lapse rate - Rate of cooling of a saturated parcel of air when it is displaced vertically, thus taking into account latent heat (added or subtracted) due to changes of phase of the water present.
		The moist adiabatic lapse rate is not constant with height, but changes with changes in pressure and temperature.
		An average moist adiabatic lapse rate is usually given as about 5° C/km.
	www.soest.hawaii.edu /MET/Faculty/businger/notes/heatrelease.html (176 words)

	Adiabatic Lapse Rates, Stability, & Cloud Development Lab - UWSP Geography 101
		Use the saturation curve in Figure 1 and your knowledge of adiabatic processes to fill in the rest of the table, assuming that the parcels of air are forced to rise.
		The rising air cools adiabatically as it rises over the mountains, and then warms adiabatically as it sinks down the other side.
		Plot and label the adiabatic lapse rates starting at 0 meters to an elevation of 3000 meters for the rising air over the land on the graph paper provided.
	www.uwsp.edu /geo/faculty/heywood/GEOG101/LABS/lapserate/lapserate.htm (984 words)

	lab5-key.htm
		Use the air temperature curve (environmental lapse rate), dew-point curve, and the adiabatic lapse rates relationships in your explanation.
		Ans 1e: Environmental lapse rate less than dry adiabatic lapse rate of 5.5 Fº/1000 feet (10 Cº/km) but greater than moist rate of 3.3 Fº/1000 feet (6 Cº/km) so lifted air is stable if air is dry (unsaturated) and unstable if air is moist (saturated).
		If you calculate the average lapse rate by averaging the two sub layers, make sure you account for the fact that the two sub layers are not of equal depth.
	www.borg.com /~glenn/umuc/171/lab05/lab5-key.htm (2338 words)

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