Approximations of the synoptic spectra of atmospheric turbulence by sums of spectra of coherent structures

摘要

It is shown that the known experimental synoptic spectra of the atmospheric turbulence (spectrum of Van der Hoven, 1957; spectrum of Kolesnikov, Monin, 1965) represent the sum of the solitary spectra of coherent structures with various sizes (with variety outer scales). The spectrums registered by us near to a mirror of the Baikal Solar Vacuum Telescope (BSVT) of the Baikal astrophysical observatory and in a under dome room of the Big Alt-Azimuth Telescope (BTA) of the Special astrophysical observatory are presented too. Apparently, the good coincidence of theoretical spectrums with experimental data (from both parties from a micrometeorological maximum) is observed. This spectrum well approximates the experimental spectrums not only in the field of a micrometeorological interval of frequencies, but also on frequencies of lower, than a micrometeorological maximum where the observational spectrums have decrease.