A Diagnostic for Evaluating the Representation of Turbulence in Atmospheric Models at the Kilometric Scale
By Rachel Honnert, Valéry Masson, Fleur Couvreux. 2011
198 citations recorded by the source corpus.
AbstractTurbulence is well represented by atmospheric models at very fine grid sizes, from 10 to 100 m, for which turbulent movements are mainly resolved, and by atmospheric models with grid sizes greater than 2 km, for which those movements are entirely parameterized. But what happens at intermediate scales, Wyngaard’s so-called terra incognita?Here an original method is presented that provides a new diagnostic by calculating the subgrid and resolved parts of five variables at different scales: turbulent kinetic energy (TKE), heat and moisture fluxes, and potential temperature and mixing ratio variances. They are established at intermediate scales for dry and cumulus-topped convective boundary layers. The similarity theorem allows the determination of the dimensionless variables of the problem. When the subgrid and resolved parts are studied, a new dimensionless variable, the dimensionless mesh size , needs to be added to the Deardorff free convective scaling variables, where h is the boundary layer heig...
Subfields: Atmospheric Science, Computational Mechanics, Environmental Engineering
View Paper: https://www.semanticscholar.org/paper/5b7f40080b826a22b9352fb39e223b72b11a9272
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Citations in the corpus
- Mixing‐length controls on high‐resolution simulations of convective storms (2013, unknown): “This regime has been termed the ‘terra incognita’ by Wyngaard (2004) or ‘grey-zone’ of turbulence and it has been studied by several authors (e.g. Craig and Dörnbrack, 2008; Parodi and Tanelli, 2010; Honnert et al., 2011; Beare, 2014).”
- Seamless Stratocumulus Simulation across the Turbulent Gray Zone (2014, background): “, and choose b 5 bbl 5 0.15 to give the best match of our function to that of Honnert et al. (2011).”
- Overview of the Meso-NH model version 5.4 and its applications (2018, background): “However, in this range of grid spacing, PBL thermals may be partly resolved and partly subgrid because they are in the grey zone of turbulence (Honnert et al., 2011).”
- Representation of the Subgrid-Scale Turbulent Transport in Convective Boundary Layers at Gray-Zone Resolutions (2015, methodology): “14f in Honnert et al. (2011)], very similar to the ratio calculated by the YSU PBL scheme.”