“…The other studies (e.g., Kulikov, 2004, 2007; Kulikov & Feigin, 2004, 2005; Kulikov & Gashturi, 2006; Sonnemann, 2001; Sonnemann et al, 1999; Sonnemann & Feigin, 1999; Sonnemann & Grygalashvyly, 2005) concerned the influence of different types of mesospheric transport (diffusion and winds in the vertical and horizontal directions and quasi‐2‐day atmospheric waves). In particular, Sonnemann and Feigin (1999) and Sonnemann et al (1999) analyzed the influence of the vertical eddy diffusion and found that in most cases only the first nontrivial mode of behavior (oscillations with periods of 2 days) can survive at the real values of the diffusion coefficient.…”