2021
DOI: 10.1175/jas-d-20-0065.1
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Toward Transient Subgrid-Scale Gravity Wave Representation in Atmospheric Models. Part I: Propagation Model Including Nondissipative Wave–Mean-Flow Interactions

Abstract: Current gravity-wave (GW) parameterization (GWP) schemes are using the steady-state assumption, where an instantaneous balance between GWs and mean flow is postulated, thereby neglecting transient, non-dissipative direct interactions between the GW field and the resolved flow. These schemes rely exclusively on wave dissipation, by GW breaking or near critical layers, as a mechanism leading to forcing of the mean flow. In a transient GWP, without steady-state assumption, non-dissipative direct wave-mean-flow in… Show more

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Cited by 21 publications
(24 citation statements)
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“…Instead of the operational GW parameterization of this model, we use a prognostic parameterization, the Multi-Scale Gravity Wave Model (MS-GWaM), which predicts the time evolution of GW action density field in positionwavenumber phase space (Achatz et al, 2017;Bölöni et al, 2021;Muraschko et al, 2015). A detailed description of MS-GWaM and its application to ICON is provided in Bölöni et al (2021). In the current setup, the single-column approximation is used in MS-GWaM, that is, lateral GW propagation is not taken into account.…”
Section: Methodsmentioning
confidence: 99%
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“…Instead of the operational GW parameterization of this model, we use a prognostic parameterization, the Multi-Scale Gravity Wave Model (MS-GWaM), which predicts the time evolution of GW action density field in positionwavenumber phase space (Achatz et al, 2017;Bölöni et al, 2021;Muraschko et al, 2015). A detailed description of MS-GWaM and its application to ICON is provided in Bölöni et al (2021). In the current setup, the single-column approximation is used in MS-GWaM, that is, lateral GW propagation is not taken into account.…”
Section: Methodsmentioning
confidence: 99%
“…The horizontal grid spacing is 160 km, and the vertical spacing is 700 m in the stratosphere. Instead of the operational GW parameterization of this model, we use a prognostic parameterization, the Multi‐Scale Gravity Wave Model (MS‐GWaM), which predicts the time evolution of GW action density field in position–wavenumber phase space (Achatz et al., 2017; Bölöni et al., 2021; Muraschko et al., 2015). A detailed description of MS‐GWaM and its application to ICON is provided in Bölöni et al.…”
Section: Methodsmentioning
confidence: 99%
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