Moist-entropic vertical adiabatic lapse rates: the standard cases and some lead towards inhomogeneous conditions

Abstract

This note is a companion of Marquet and Geleyn (2013, {arXiv:1401.2379 [ao-ph]}), where adiabatic lapse rates ${\Gamma }_{ns}$ and ${\Gamma }_{sw}$ are derived for non-saturated (${\Gamma }_{ns}$) or saturated (${\Gamma }_{sw}$) parcel of moist-air. They are computed in terms of the vertical derivative of the moist-air entropy potential temperature ${\theta }_s$ defined in Marquet (2011, {arXiv:1401.1097 [ao-ph]}). The saturated value ${\Gamma }_{sw}$ is rewritten in this note so that a more compact formulation is obtained. The new formulation for ${\Gamma }_{sw}$ is expressed in term of a weighting factor $C$. This factor may represent the proportion of an air parcel being in saturated conditions.

Based on a note published in the WGNE Blue-Book in 2012 (3 pages, 0 Figures). V2: add arXiv links to Marquet (2011) and Marquet and Geleyn (2013)

Cited by in corpus (1)

• On the definition of a moist-air potential vorticity