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Turbulence and Diffusion

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.


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

Recent publications

  • Avsarkisov, V., 2020: On the Buoyancy Subrange in Stratified Turbulence. Atmos. 11,  6: 659, doi:10.3390/atmos11060659.
  • Avsarkisov, V., E. Becker & T. Renkwitz, 2022: Turbulent Parameters in the Middle Atmosphere: Theoretical Estimates Deduced from a Gravity Wave–Resolving General Circulation Model. J. Atmos. Sci. 79,  4: 933-952, doi:10.1175/jas-d-21-0005.1.
  • Chau, J. L., J. M. Urco, V. Avsarkisov, J. P. Vierinen, R. Latteck, C. M. Hall & M. Tsutsumi, 2020: Four-Dimensional Quantification of Kelvin-Helmholtz Instabilities in the Polar Summer Mesosphere Using Volumetric Radar Imaging. Geophys. Res. Lett. 47,  1, doi:10.1029/2019gl086081.
  • Gandía-Barberá, S., F. Alcántara-Ávila, S. Hoyas & V. Avsarkisov, 2021: Stratification effect on extreme-scale rolls in plane Couette flows. Phys. Rev. Fluids 6,  3, doi:10.1103/PhysRevFluids.6.034605.
  • Ghosh, P., M. He, R. Latteck, T. Renkwitz, V. Avsarkisov, M. Zecha & J. L. Chau, 2022: Characteristics of Frequency-Power Spectra in the Troposphere and Lower Stratosphere Over Andøya (Norway) Revealed by MAARSY. J. Geophys. Res. Atmos. 127,  13, doi:10.1029/2021jd036343.
  • Poblet, F. L., J. L. Chau, J. F. Conte, V. Avsarkisov, J. Vierinen & H. Charuvil Asokan, 2022: Horizontal Wavenumber Spectra of Vertical Vorticity and Horizontal Divergence of Mesoscale Dynamics in the Mesosphere and Lower Thermosphere Using Multistatic Specular Meteor Radar Observations. Earth Space Sci. 9,  9: 002201, doi:10.1029/2021ea002201.
  • Schaefer-Rolffs, U., 2019: The scale invariance criterion for geophysical fluids. Eur. Phys. J. B 74: 92-98, doi:10.1016/j.euromechflu.2018.11.005.
  • Söder, J., C. Zülicke, M. Gerding & F.-J. Lübken, 2021: High-resolution observations of turbulence distributions across tropopause folds. J. Geophys. Res. Atmos. 126,  6: 033857, doi:10.1029/2020JD033857.
  • Strelnikov, B., M. Eberhart, M. Friedrich, J. Hedin, M. Khaplanov, G. Baumgarten, B. P. Williams, T. Staszak, H. Asmus, I. Strelnikova, R. Latteck, M. Grygalashvyly, F.-J. Lübken, J. Höffner, R. Wörl, J. Gumbel, S. Löhle, S. Fasoulas, M. Rapp, A. Barjatya, M. J. Taylor & P.-D. Pautet, 2019: Simultaneous in situ measurements of small-scale structures in neutral, plasma, and atomic oxygen densities during the WADIS sounding rocket project. Atmos. Chem. Phys. 19,  17: 11443-11460, doi:10.5194/acp-19-11443-2019.
  • Vierinen, J., J. L. Chau, H. Charuvil, J. M. Urco, M. Clahsen, V. Avsarkisov, R. Marino & R. Volz, 2019: Observing Mesospheric Turbulence With Specular Meteor Radars: A Novel Method for Estimating Second‐Order Statistics of Wind Velocity. Earth Space Sci. 6,  7: 1171-1195, doi:10.1029/2019ea000570.


  • Erich Becker
  • Victor Avsarkisov
  • Mykhaylo Grygalashvyly
  • Urs Schaefer-Rolffs