Aeroelectric structures and turbulence in the atmospheric boundary layer
| Autor: | S. V. Anisimov, Sergej Zilitinkevich, M. V. Shatalina, Evgeny A. Mareev, N. M. Shikhova, S. V. Galichenko |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences Planetary boundary layer business.industry Turbulence lcsh:QC801-809 SODAR 01 natural sciences Spectral line lcsh:QC1-999 010305 fluids & plasmas Computational physics lcsh:Geophysics. Cosmic physics Optics 13. Climate action Electric field 0103 physical sciences Turbulence kinetic energy Electrical measurements lcsh:Q business lcsh:Science Mixing (physics) lcsh:Physics 0105 earth and related environmental sciences |
| Zdroj: | Nonlinear Processes in Geophysics, Vol 20, Iss 5, Pp 819-824 (2013) Nonlinear Processes in Geophysics |
| ISSN: | 1607-7946 |
| Popis: | Complex electrical measurements with the use of sodar data show that electric field pulsation analysis is useful for electrodynamics/turbulence monitoring under different conditions. In particular, the number of aeroelectric structures (AES) generated per hour is a convenient measure of the turbulence intensity. During convectively unstable periods, as many as 5–10 AES form per hour. Under stable conditions, AES occasionally form as well, indicating the appearance of occasional mixing events reflected in the electric field perturbations. AES magnitudes under stable conditions are relatively small, except in special cases such as high humidity and fog. The analysis of electric field (EF) spectra gives additional useful information on the parameters of the atmospheric boundary layer and its turbulence. A rather sharp change in the spectrum slope takes place in the vicinity of 0.02 Hz under stable conditions. The characteristic slope of the spectrum and its change are reproduced in a simple model of EF formation. |
| Databáze: | OpenAIRE |
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