| 雨区衰减及谱变化影响雷达测雨精度的数值模拟 |
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| 引用本文： | 刘黎平.雨区衰减及谱变化影响雷达测雨精度的数值模拟[J].南京气象学院学报,1994,17(2):255-258. |
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| 作者姓名： | 刘黎平 |
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| 作者单位： | 中国科学院兰州高原大气物理研究所 |
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| 摘 要： | 用随机函数的方法，并假定雨滴谱为Ｇａｍｍａ分布，模拟并讨论了雨滴谱变化及雨区衰减对雷达和双线偏振雷达测雨误差的影响。结果表明：双线偏振雷达测雨精度受雨区衰减及滴谱变化的影响均小于普通雷达。雨区衰减使双线偏振雷达测雨产生小雨高估，大雨影响不大的现象，其主要原因可能是差反射率因子ＺＤＲ的测量误差。
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| 关 键 词： | 测雨精度 雨区衰减 雨滴谱 雷达 |
NUMERICAL SIMULATION OF EFFECTS OF RAINFALL ATTENUATION AND VARIATION IN RAINDROP SIZE DISTRIBITION ON ACCURACY OFRAINFALL MEASURED USING ABI-LINE POLARIZATION RADAR |
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| Liu Liping.NUMERICAL SIMULATION OF EFFECTS OF RAINFALL ATTENUATION AND VARIATION IN RAINDROP SIZE DISTRIBITION ON ACCURACY OFRAINFALL MEASURED USING ABI-LINE POLARIZATION RADAR[J].Journal of Nanjing Institute of Meteorology,1994,17(2):255-258. |
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| Authors: | Liu Liping |
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| Abstract: | Under the assumption that the raindrop size has a Gamma distribution,randomfunction is employed to model and investigate the effects of the variation in the size distribu-tion and rainfall attenuation on the precipitatlon error measured by a common radar and bi-line polarization radar. Results show that the effects of the latter are smaller as opposed tothe former,and the rainfall attenuation causes the polarization measurement to be overesti-mated for light rain and to show no big influence for heavy rainfall. |
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| Keywords: | bi-line polarization radar random function raindrop size distribution numericalsimulation |
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