Research on Doppler Radar Spectral Width and the Variability of Turbulent Dissipation Rate

Journal of Atmospheric and Environmental Optics ›› 2009, Vol. 4 ›› Issue (6): 406-413.

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Research on Doppler Radar Spectral Width and the Variability of Turbulent Dissipation Rate

ZHANG Cai-Yun, DONG De-Bao, WENG Ning-Quan

(Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences, Hefei 230031, China)

Received:2009-04-15 Revised:2009-05-21 Online:2009-11-28 Published:2009-11-17

Abstract

Abstract:

Turbulent kinetic energy dissipation rate (turbulent dissipation rate) is an important parameter of the turbulence. There is a new measurement on the turbulence, which is estimating the turbulent dissipation rate using the spectral width of wind profiler. From studying the influencing factor on the spectral width of echo signal of airdar16000 wind profiler radar, and extracting the spectral width contributing by turbulence, the turbulent dissipation rate can be estimated. Results show that the value of spectral width from turbulence is below 0.5 , and the oblique beams are more reliable than the vertical beam，and the turbulent dissipation rate distributes between and , also, it decreases with the increase of the height. The result accords with the theory, so it is feasible to estimate the dissipation rate from wind profiler radar.

Key words: wind profiler, spectral width, turbulent dissipation rate

CLC Number:

P407.7

ZHANG Cai-Yun, DONG De-Bao, WENG Ning-Quan. Research on Doppler Radar Spectral Width and the Variability of Turbulent Dissipation Rate[J]. Journal of Atmospheric and Environmental Optics, 2009, 4(6): 406-413.

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Research on Doppler Radar Spectral Width and the Variability of Turbulent Dissipation Rate

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