PQG–DL–Ekman: A Triple-Deck Boundary Layer Theory for Large-Scale Atmospheric Flow with Moist Process Closures.
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| Title: | PQG–DL–Ekman: A Triple-Deck Boundary Layer Theory for Large-Scale Atmospheric Flow with Moist Process Closures. |
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| Authors: | Bäumer, Daniel1 (AUTHOR) daniel.baeumer@univie.ac.at, Klein, Rupert2 (AUTHOR) |
| Source: | Journal of the Atmospheric Sciences. Jan2026, Vol. 83 Issue 1, p3-27. 25p. |
| Subjects: | Atmospheric boundary layer, Boundary layer equations, Clausius-Clapeyron relation, Atmospheric circulation |
| Abstract: | Reduced mathematical models for atmospheric dynamics at various scales have a long and rich history. However, versions of such models that explicitly incorporate moisture and phase changes have been developed only fairly recently. This work merges one of said modeling innovations, namely, Smith and Stechmann's precipitating quasigeostrophic (PQG) model family, with a triple-deck boundary layer theory due to Klein et al. that extends the classical quasigeostrophic (QG)–Ekman theory by an intermediate diabatic layer (DL). A detailed asymptotic analysis of the Clausius–Clapeyron relation and Kessler-type bulk microphysics closures is included in the systematic derivation of the resulting PQG–DL–Ekman theory. Furthermore, to illustrate some of the model's properties, explicit axisymmetric solutions of the precipitating diabatic layer equations are derived and combined with numerical sample solutions for the bulk flow. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Reduced mathematical models for atmospheric dynamics at various scales have a long and rich history. However, versions of such models that explicitly incorporate moisture and phase changes have been developed only fairly recently. This work merges one of said modeling innovations, namely, Smith and Stechmann's precipitating quasigeostrophic (PQG) model family, with a triple-deck boundary layer theory due to Klein et al. that extends the classical quasigeostrophic (QG)–Ekman theory by an intermediate diabatic layer (DL). A detailed asymptotic analysis of the Clausius–Clapeyron relation and Kessler-type bulk microphysics closures is included in the systematic derivation of the resulting PQG–DL–Ekman theory. Furthermore, to illustrate some of the model's properties, explicit axisymmetric solutions of the precipitating diabatic layer equations are derived and combined with numerical sample solutions for the bulk flow. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00224928 |
| DOI: | 10.1175/JAS-D-25-0062.1 |
