Mesoscale Ascent in Nocturnal Low-Level Jets

A theory for gentle but persistent mesoscale ascent in the lower troposphere is developed in which the vertical motion arises as an inertia–gravity wave response to the sudden decrease of turbulent mixing in a horizontally heterogeneous convective boundary layer (CBL). The zone of ascent is centered...

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Veröffentlicht in:	Journal of the atmospheric sciences 2018-05, Vol.75 (5), p.1403-1427
Hauptverfasser:	Shapiro, Alan, Fedorovich, Evgeni, Gebauer, Joshua G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Ascent Atmospheric boundary layer Boundary layers Boussinesq approximation Boussinesq equations Brunt-vaisala frequency Buoyancy Climate Cold Computational fluid dynamics Convection Density stratification Duration Energy conservation Equations of motion Fluid flow Free atmosphere Gravitational waves Gravity Gravity waves Inertia Inertia gravity waves Inertial oscillations Levels Low-level jets Lower troposphere Meteorology Mixed layer Plains Precipitation Rain Shutdowns Stratification Thermal energy Three dimensional motion Troposphere Turbulent mixing Two dimensional analysis Variation Velocity Vertical motion Vertical velocities Warm seasons Wavelengths Weather forecasting
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