| 降雨强度,雨区衰减与双线偏振雷达观测量关系的研究 |
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| 引用本文： | 蔡启铭,徐宝祥.降雨强度,雨区衰减与双线偏振雷达观测量关系的研究[J].高原气象,1990,9(4):347-355. |
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| 作者姓名： | 蔡启铭 徐宝祥 |
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| 作者单位： | 中国科学院兰州高原大气物理研究所，中国科学院兰州高原大气物理研究所，中国科学院兰州高原大气物理研究所 中科院南京地理与湖泊研究所 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 本文为了改装双线偏振雷达的需要,用扩展边界条件法计算了椭球形雨滴的后向散射截面、衰减截面及吸收截面,得出了任意谱参数情况下,可能产生的散射强度及差反射率因子Z_(DR)值的大小。给出了降雨强度、衰减系数和双线偏振雷达观测量间的关系。为双线偏振雷达定量测量降雨工作及讨论雨区对雷达波衰减打下了基础。
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| 关 键 词： | 降雨 强度 双线 偏振 雷达 测量 |
A STUDY OF THE RELATION BETWEEN RAININESS, EXTINCTION OF RAIN CLOUD AND PARAMETERS MEASURED BY A DUAL LINEAR POLARIZATION RADAR |
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| Cai Qiming Xu Baoxiang Liu Liping.A STUDY OF THE RELATION BETWEEN RAININESS, EXTINCTION OF RAIN CLOUD AND PARAMETERS MEASURED BY A DUAL LINEAR POLARIZATION RADAR[J].Plateau Meteorology,1990,9(4):347-355. |
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| Authors: | Cai Qiming Xu Baoxiang Liu Liping |
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| Abstract: | Aimed at developing a dual linear polarization radar, we have calculated backscattering, extinction and absorbing cross sections of oblate spheroidal raindrops by using the extended boundary condition method. The scattering intensities and the differential reflectivities (Z DR) for different hydrometeors with any spectral parameters have been obtained. We have also given the relationships between rain rates, extinction coefficients and the parameters measured by the dual linear polarization radar. This work has laid the foundation of quantitative measurement of rain rate and the discussion of extinction properties of radar wave in rain clouds. |
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| Keywords: | Dual linear polarization radar Differential reflectivity 7 DR Rainfall measurement Microwave extinction |
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