Universal spectra of electric field pulsations in the atmosphere

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 −...

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Bibliographic Details
Published in:Geophysical research letters 2002-12, Vol.29 (24), p.70-1-70-4
Main Authors: Anisimov, S. V., Mareev, E. A., Shikhova, N. M., Dmitriev, E. M.
Format: Article
Language:English
Subjects:
Electric fields
Fluctuation
Fluid dynamics
Fluid flow
Fog
Pulsation
Spectra
Turbulence
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Summary: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.
ISSN:0094-8276
1944-8007
DOI:10.1029/2002GL015765