Turbulent dynamics

The impact of micro-scale turbulence on the dynamics can be described in the statistical mean as an effective diffusivity. The statistical behavior of large-scale waves can be described as macro-turbulence. Both concepts need to be considered for a correct treatment of resolved and unresolved scales in numerical simulations.

Methods

For the topic, circulation models with parameterized turbulence were used (ICON-IAP and KMCM), partly coupled with a chemistry model (MECTM). Theoretical contributions on this subject were devoted to the problem of wave-induced mixing and turbulent closure at different scales.

Recent publications

  • Becker, E. & S. Brune, 2014: Reply to comments by M.L. Waite and C. Snyder on "Indications of stratified turbulence in a mechanistic GCM". J. Atmos. Sci. 71: 858 - 862. doi:10.1175/JAS-D-13-0281.1.
  • Brune, S. & E. Becker, 2013: Indications of stratified turbulence in a mechanistic GCM. J. Atmos. Sci. 70: 231 - 247. doi:10.1175/JAS-D-12-025.1.
  • Schaefer-Rolffs, U., 2016: A generalized formulation of the dynamic Smagorinsky model. Meteorol. Z. 26,  2: 181-197, doi:10.1127/metz/2016/0801.
  • Schaefer-Rolffs, U. & E. Becker, 2013: Horizontal momentum diffusion in GCMs using the Dynamic Smagorinsky Model. Mon. Wea. Rev. 141: 887 - 899. doi:10.1175/MWR-D-12-00101.1.
  • Schaefer-Rolffs, U., R. Knöpfel & E. Becker, 2015: A scale invariance criterion for LES parametrizations. Meteorol. Z. 24, 1: 3-13. doi:10.1127/metz/2014/0623.

Staff

  • Erich Becker
  • Almut Gaßmann
  • Mikhailo Grygalashvyly
  • Urs Schaefer-Rolffs