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27 March 2022 Estimation of boundary-layer turbulence parameters in Hefei based on wind profile radar
Duolong Chen, Gang Sun, Liming Zhu, Hanjiu Zhang, Kun Zhang, Ningquan Weng, Xuebin Li
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Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 12169AC (2022) https://doi.org/10.1117/12.2625866
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China
Abstract
This paper present the diurnal and seasonal variation of Turbulence Kinetic Energy (TKE) dissipation rate ( Ε ) in the Atmospheric Boundary-Layer (ABL) in Hefei area. Doppler spectrum width of wind profiler radar are used to separate the non-turbulent spectral width from the observed spectrum width and estimate ε .It is found that in the lower tropospheric height ε is in the range from 10-6 to 10-3 m2 s-3 . ε showed significant diurnal variation in the boundary-layer, with a smaller value at night and a larger value during the day, and the maximum value 10-3 m2 s-3 appears at the top of the ABL during the daytime. The diurnal variation of ε can be used to demonstrate the change of the boundary-layer height in Hefei area. The boundary-layer height begins to rise after sunrise and reaches the maximum at noon, about 1200 m. The parameter ε also shows significant seasonal variation. The ε and height of boundary-layer increased gradually since spring, reaching a maximum of about 1.3km in autumn and decreasing to the same level as in spring in winter. Because it is not affected by water vapor and temperature, ε from the data inversion of wind profile radar can describe turbulence information more accurately, and the results provide help for the study of matter and energy exchange between earth and air in Hefei area and laser atmospheric transmission etc.
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Duolong Chen, Gang Sun, Liming Zhu, Hanjiu Zhang, Kun Zhang, Ningquan Weng, and Xuebin Li "Estimation of boundary-layer turbulence parameters in Hefei based on wind profile radar", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 12169AC (27 March 2022); https://doi.org/10.1117/12.2625866
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KEYWORDS
Radar
Turbulence
Atmospheric turbulence
Doppler effect
Troposphere
Atmospheric physics
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