Difference between revisions of "Pseudoadiabatic lapse rate"
From Glossary of Meteorology
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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 Γps is the pseudoadiabatic lapse rate, g is gravitational acceleration, rv is the mixing ratio of water vapor, cpd and cpv are the specific heats at constant pressure of dry air and water vapor, Lv 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.
