High-resolution large-eddy simulations of stably stratified flows: application to subkilometer-scale turbulence in the upper troposphere–lower stratosphere

摘要: Abstract. Large-eddy simulations of stably stratified flows are carried out and analyzed using the mesoscale atmospheric model Meso-NH for applications to kilometer- subkilometer-scale turbulence in upper troposphere–lower stratosphere. Different levels generated a large-scale stochastic forcing technique that was especially devised treat flows. The study focuses on analysis statistics, including mean quantities energy spectra, as well detailed description flow topology. impact resolution is also discussed by decreasing grid spacing 2 m increasing number points 8 × 109. Because stratification, substantially anisotropic, large elongated structures form horizontal directions, accordance with theoretical spectral, direct numerical It found inertial range kinetic spectrum, generally observed at scales larger than few kilometers, prolonged into subkilometric range, down Ozmidov obey isotropic Kolmogorov turbulence. This shows capability models like represent subkilometer scales.