# Difference between revisions of "Pseudoadiabatic lapse rate"

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− | <div class="definition"><div class="short_definition">The rate of decrease of [[temperature]] with height of a [[parcel]] undergoing a [[pseudoadiabatic process]].</div><br/> <div class="paragraph">It is given by <div class="display-formula"><blockquote>[[File:ams2001glos-Pe58.gif|link=|center|ams2001glos-Pe58]]</blockquote></div> where Γ<sub>''ps''</sub> is the pseudoadiabatic lapse rate, ''g'' is gravitational [[acceleration]], ''r''<sub>''v''</sub> is the [[mixing ratio]] of [[water vapor]], ''c''<sub>''pd''</sub> and ''c''<sub>''pv''</sub> are the [[specific heats]] at constant [[pressure]] of [[dry air]] and water vapor, ''L''<sub>''v''</sub> is the [[latent heat]] of [[vaporization]], ''R'' is the dry air gas constant, ε ≈ 0.62 is the ratio of the gas constants of dry air and water vapor, and ''T'' is temperature. The above [[lapse rate]] is usually within 1 percent of those shown under [[moist-adiabatic lapse rate]] and [[reversible moist-adiabatic lapse rate]].</div><br/> </div> | + | <div class="definition"><div class="short_definition">The rate of decrease of [[temperature]] with height of a [[parcel]] undergoing a [[pseudoadiabatic process]].</div><br/> <div class="paragraph">It is given by <div class="display-formula"><blockquote>[[File:ams2001glos-Pe58.gif|link=|center|ams2001glos-Pe58]]</blockquote></div> where Γ<sub>''ps''</sub> is the pseudoadiabatic lapse rate, ''g'' is gravitational [[acceleration]], ''r''<sub>''v''</sub> is the [[mixing ratio]] of [[water vapor]], ''c''<sub>''pd''</sub> and ''c''<sub>''pv''</sub> are the [[specific heats]] at constant [[pressure]] of [[dry air]] and water vapor, ''L''<sub>''v''</sub> is the [[latent heat]] of [[vaporization]], ''R'' is the dry air gas constant, ε ≈ 0.62 is the ratio of the gas constants of dry air and water vapor, and ''T'' is temperature. The above [[lapse rate]] is usually within 1 percent of those shown under [[moist-adiabatic lapse rate]] and [[reversible moist-adiabatic process|reversible moist-adiabatic lapse rate]].</div><br/> </div> |

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## Latest revision as of 17:41, 25 April 2012

## pseudoadiabatic lapse rate

It is given by where Γ

_{ps}is the pseudoadiabatic lapse rate,*g*is gravitational acceleration,*r*_{v}is the mixing ratio of water vapor,*c*_{pd}and*c*_{pv}are the specific heats at constant pressure of dry air and water vapor,*L*_{v}is the latent heat of vaporization,*R*is the dry air gas constant, ε ≈ 0.62 is the ratio of the gas constants of dry air and water vapor, and*T*is temperature. The above lapse rate is usually within 1 percent of those shown under moist-adiabatic lapse rate and reversible moist-adiabatic lapse rate.

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