Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29x..70a&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 24, pp. 70-1, CiteID 2217, DOI 10.1029/2002GL015765
Physics
8
Meteorology And Atmospheric Dynamics: Atmospheric Electricity, Meteorology And Atmospheric Dynamics: Boundary Layer Processes, Meteorology And Atmospheric Dynamics: Theoretical Modeling, Meteorology And Atmospheric Dynamics: Turbulence, Meteorology And Atmospheric Dynamics: Instruments And Techniques
Scientific paper
Short-term (f ~= 10-3-1 Hz) electric field pulsations in the surface atmospheric layer have been measured during 1999-2001 under the fair-weather and fog conditions. At the frequencies of 10-2-1 Hz these pulsations have a power-law spectrum with the spectral index varying in the range from -1.23 to -3.36 while the most probable values of the index fall into the range from -2.25 to -3.0, unlike the temperature fluctuation spectra which obey in the inertial subrange the Kolmogorov power law with the spectral index close to -5/3. Under the fog conditions the intensity of electric-field pulsations increases by about an order of magnitude compared to the fair-weather conditions. The relation of spectral characteristics to the formation of aero-electric structures (AESs) is evident; the spectral index distribution during AES flyby has two maxima. Analysis of the mechanisms explains the relationship between electric-field spectra and the neutral-gas turbulence and AES formation.
Anisimov S. V.
Dmitriev E. M.
Mareev Eugene A.
Shikhova N. M.
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