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 &#x00393;<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, &#x003b5; &asymp; 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>
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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 &#x00393;<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, &#x003b5; &asymp; 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

The rate of decrease of temperature with height of a parcel undergoing a pseudoadiabatic process.

It is given by
ams2001glos-Pe58
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.