| 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 |
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| 引用本文： | 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. |
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| 作者姓名： | 张彩云 董德保 翁宁泉 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室,安徽,合肥,230031 |
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| 基金项目： | 安徽省人才开发专项资金项目 |
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| 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 m2s-2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10-7m2s-3到10-2m-2s-3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.
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| 关 键 词： | 风廓线雷达 谱宽 湍流耗散率 |
| 收稿时间： | 2009/4/15 |
Research on Doppler Radar Spectral Width and Variability of Turbulent Dissipation Rate |
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| ZHANG Cai-yun,DONG De-bao,WENG Ning-quan.Research on Doppler Radar Spectral Width and Variability of Turbulent Dissipation Rate[J].Journal of Atmospheric and Environmental Optics,2009,4(6):406-413. |
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| Authors: | ZHANG Cai-yun DONG De-bao WENG Ning-quan |
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| Affiliation: | ZHANG Cai-yun,DONG De-bao,WENG Ning-quan (Key Laboratory of Atmospheric Composition and Optical Radiation,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China) |
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| 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 estimats the turbulent dissipation rate using the spectral width of wind profiler.Based on studying the influencing factor on the spectral width of echo signal of airdar 16000 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 wid... |
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| Keywords: | wind profiler radar spectral width turbulent dissipation rate |
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