气象科学2017，Vol.37Issue(6)：797-807,11.DOI:10.3969/2016jms.0078
雷达回波强度与雨滴谱参数的相关性研究
The correlation research between radar echo intensity and characteristic of raindrop size distribution
摘要
Abstract
At present,the correlation between radar echo intensity and rain intensity is mostly adopted in radar quantitative precipitation estimation,but radar echo intensity does not correspond to rain intensity.The radar observations and synergetic Parsivel raindrop size distribution data from Lushan and Nanjing were used to establish the functional relations between radar echo intensity and various raindrop size distribution parameters.At the same time,the radar echo intensities fitted by the determinate func tional relations were compared to the real radar echo intensities in order to check the rationality of the assumed functional relations.And the optimal option about y in the functional relation was obtained by comparing the fitting relative errors of two types of clouds precipitation in two places.All the work above is done to find a new approach for radar quantitative precipitation estimation.The results prove that the fitting of raindrop size distribution parameters of two types of clouds precipitation in Lushan and Nanjing to radar echo intensity is generally good,and the fitting of convective cloud precipitation is significantly bet ter than that of stratiform cloud precipitation.The fitting curve of each raindrop size distribution parameter to radar echo intensity in the stratiform cloud precipitation is roughly similar,but those fitting curves in the convective cloud precipitation are quite different in two places.The relative errors fitted by two types of clouds precipitation in Nanjing are smaller than those in Lushan.Except for convective cloud precipitation in Lushan,Dv is the optimal option about y in the fitting formulas of two types of clouds precipitation in two places.And the fitting of N and DP is the best in the fitting formula of convective cloud precipitation in Lushan.关键词
雷达回波强度/定量估算降水/雨滴谱拟合Key words
Radar echo intensity/Quantitative precipitation estimation/Raindrop spectrum fitting分类
天文与地球科学引用本文复制引用
张欢,濮江平,苑海燕,刘广超..雷达回波强度与雨滴谱参数的相关性研究[J].气象科学,2017,37(6):797-807,11.基金项目
国家重点基础研究发展计划(973计划)项目(2010CD950804) （973计划）
