Are the effects of large scale flow conditions really lost through the turbulent cascade?

Details Are the effects of large scale flow conditions really lost through the turbulent cascade? Are the effects of large scale flow conditions really lost through the turbulent cascade?

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30d..13k&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 4, pp. 13-1, CiteID 1164, DOI 10.1029/2002GL015284

Physics

Geophysics

3

Mathematical Geophysics: Fractals And Multifractals, Meteorology And Atmospheric Dynamics: Numerical Modeling And Data Assimilation, Meteorology And Atmospheric Dynamics: Turbulence

Scientific paper

The conceptual framework for modeling the inertial subrange is strongly influenced by the Kolmogorov cascade phenomena, which is nowadays the subject of significant reinterpretation. It has been argued that the effects of boundary conditions influence large-scale motion and direct interaction between large and small scales is possible by means other than passing sequentially through the full cascade. Using longitudinal (u) and vertical (w) velocity and temperature (T) time series measurements collected in the atmospheric surface layer (ASL), we evaluate whether the inertial subrange multifractral function (f(α)) of all three flow variables is influenced by atmospheric stability (ξ), which is a bulk measure of the effect of boundary conditions on large scale flow properties for ASL turbulence. This study is the first to demonstrate that ξ significantly influences f(α) for all three flow variables. Here, statistical significance is evaluated using a novel wavelet-based Functional Analysis of Variance (FANOVA) approach that explicitly considers different classes of ξ, the flow variable type, and possible interactions between ξ and the three flow variables.

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