风廓线雷达的谱宽分析及湍流耗散率的变化特征初步研究

大气与环境光学学报 ›› 2009, Vol. 4 ›› Issue (6): 406-413.

风廓线雷达的谱宽分析及湍流耗散率的变化特征初步研究

张彩云董德保翁宁泉

(中国科学院大气成分与光学重点实验室安徽合肥 230031)

收稿日期:2009-04-15 修回日期:2009-05-21 出版日期:2009-11-28 发布日期:2009-11-17
通讯作者: 张彩云（1984-），女，硕士研究生，主要研究方向为微波雷达遥感. E-mail:cyzh@mail.ustc.edu.cn
作者简介:张彩云（1984-），女，硕士研究生，主要研究方向为微波雷达遥感.
基金资助:
安徽省人才开发专项资金项目(2008Z042)资助

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 Published:2009-11-28 Online:2009-11-17

摘要/Abstract

摘要：

湍流动能耗散率（简称湍流耗散率）是表征湍流强弱的重要参数。利用风廓线雷达的谱宽估算湍流耗散率是研究湍流强度的一种新方法。分析了airdar16000风廓线雷达的回波功率谱谱宽的影响因素，提取出湍流贡献的谱宽加宽，并由此计算湍流耗散率。得出结论：湍流谱宽值在0.5 以内；在风廓线雷达的波束中，倾斜波束的谱宽值比垂直波束的谱宽值更可靠；利用倾斜波束提取的谱宽计算得到的湍流耗散率的量级在到之间；湍流耗散率的大小随着高度的增加而减小。结果同理论符合，证明该方法可行。

关键词: 风廓线雷达, 谱宽, 湍流耗散率

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

中图分类号:

P407.7

张彩云董德保翁宁泉. 风廓线雷达的谱宽分析及湍流耗散率的变化特征初步研究[J]. 大气与环境光学学报, 2009, 4(6): 406-413.

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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