雨滴谱仪和天气雷达观测的反射率因子对比分析

doi:10.3969/j.issn.1673-503X.2017.05.012

Abstract

Abstract: A comparison observation between the Parsivel raindrop spectrometer and the new generation weather radar on a rainstorm occurring in Shenyang area in 2012 was conducted and the counted classifiable reflectivity factor Z_P calculated with the raindrop spectrometer data was compared with the reflectivity factor Z calculated with the radar Range-Height Indicator data.The results show that for the rainstorm,the echo intensity of radar is underestimated and the reflectivity factor Z_P is greater than Z.Based on the statistics of radar data at a single point and its 3-point average,the reflectivity factor Z is on average about 8.30 dBz and 8.64 dBz lower than the normal value respectively.The sampling range of observation instrument,temporal-spatial matching of data and the change of spectral width are the main reasons for causing the inconsistency between two kinds of reflectivity factors observed with the two devices.

Key words: Raindrop spectrum, Weather radar, Reflectivity factor, Rainstorm

CLC Number:

P413

LI Yang, ZHANG Jin-guang, YUAN Jian, FANG Bin, CHEN Yu, SHAN Nan, ZHAI Qing-fei, ZHU Yi-ming, WAN Xu-jiang, CUI Yuan-hong. Comparative analysis of reflectivity factors measured with raindrop spectrometer and weather radar[J]. Journal of Meteorology and Environment, 2017, 33(5): 91-96.

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Comparative analysis of reflectivity factors measured with raindrop spectrometer and weather radar

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