| Spectral dispersion of cloud droplet size distributions and radar threshold reflectivity for drizzle |
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| 作者姓名： | 解小宁 刘晓东 |
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| 作者单位： | [1]State Key Laboratory of Loess and Quaternary Geology, Institute of E~rth Environment, Chinese Academy of Sciences, Xi＇an 710075, China [2]Graduate University of the Chinese Academy of Sciences, Beijing 100049, China [3]Department of Environmental Science and Technology, School of Human Settlements and Civil Engineering Xi＇an Jiaotong University, Xi＇an 710049, China |
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| 基金项目： | Project supported by the Special Foundation for China Nonprofit Industry (Grant No. GYHY200706036), the National Excellent Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 40825008), and the National Basic Research Program of China (Grant No. 2010CB833406). |
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| 摘 要： | From first principles, we find that the radar threshold reflectivity between nonprecipitating clouds and precipitating clouds is strongly related to not only the cloud droplet number concentration but also the spectral dispersion of cloud droplet size distributions. The further investigation indicates that the threshold value is an increasing function of spectral dispersion and cloud droplet number concentration. These results may improve our understanding of the cloud-precipitation interaction and the aerosol indirect effect.
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| 关 键 词： | radar threshold reflectivity spectral dispersion cloud droplet number concentration |
| 收稿时间： | 2009-11-18 |
Spectral dispersion of cloud droplet size distributions and radar threshold reflectivity for drizzle |
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| Xie Xiao-Ning and Liu Xiao-Dong.Spectral dispersion of cloud droplet size distributions and radar threshold reflectivity for drizzle[J].Chinese Physics B,2010,19(10):109201-109201. |
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| Authors: | Xie Xiao-Ning and Liu Xiao-Dong |
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| Affiliation: | State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China; Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China; Department of Environmental Science and Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong U |
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| Abstract: | From first principles, we find that the radar threshold reflectivity between nonprecipitating clouds and precipitating clouds is strongly related to not only the cloud droplet number concentration but also the spectral dispersion of cloud droplet size distributions. The further investigation indicates that the threshold value is an increasing function of spectral dispersion and cloud droplet number concentration. These results may improve our understanding of the cloud-precipitation interaction and the aerosol indirect effect. |
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| Keywords: | radar threshold reflectivity spectral dispersion cloud droplet number concentration |
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