Pseudoadiabatic lapse rate

From Glossary of Meteorology
Revision as of 18:46, 26 January 2012 by imported>Perlwikibot (Created page with " {{TermHeader}} {{TermSearch}} <div class="termentry"> <div class="term"> == pseudoadiabatic lapse rate == </div> <div class="definition"><div class="short_definition">...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

pseudoadiabatic lapse rate

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

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.

Copyright 2022 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.