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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.
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]
Copyright of Journal of the Atmospheric Sciences is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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An: 191573036
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PubTypeId: academicJournal
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  Data: PQG–DL–Ekman: A Triple-Deck Boundary Layer Theory for Large-Scale Atmospheric Flow with Moist Process Closures.
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  Data: <searchLink fieldCode="AR" term="%22Bäumer%2C+Daniel%22">Bäumer, Daniel</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> daniel.baeumer@univie.ac.at</i><br /><searchLink fieldCode="AR" term="%22Klein%2C+Rupert%22">Klein, Rupert</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Atmospheric+Sciences%22">Journal of the Atmospheric Sciences</searchLink>. Jan2026, Vol. 83 Issue 1, p3-27. 25p.
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  Data: <searchLink fieldCode="DE" term="%22Atmospheric+boundary+layer%22">Atmospheric boundary layer</searchLink><br /><searchLink fieldCode="DE" term="%22Boundary+layer+equations%22">Boundary layer equations</searchLink><br /><searchLink fieldCode="DE" term="%22Clausius-Clapeyron+relation%22">Clausius-Clapeyron relation</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+circulation%22">Atmospheric circulation</searchLink>
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  Label: Abstract
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  Data: 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]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the Atmospheric Sciences is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1175/JAS-D-25-0062.1
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      – Code: eng
        Text: English
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        PageCount: 25
        StartPage: 3
    Subjects:
      – SubjectFull: Atmospheric boundary layer
        Type: general
      – SubjectFull: Boundary layer equations
        Type: general
      – SubjectFull: Clausius-Clapeyron relation
        Type: general
      – SubjectFull: Atmospheric circulation
        Type: general
    Titles:
      – TitleFull: PQG–DL–Ekman: A Triple-Deck Boundary Layer Theory for Large-Scale Atmospheric Flow with Moist Process Closures.
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            NameFull: Bäumer, Daniel
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            NameFull: Klein, Rupert
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              Text: Jan2026
              Type: published
              Y: 2026
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              Value: 83
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