气象2017，Vol.43Issue(10)：1198-1212,15.DOI:10.7519/j.issn.1000-0526.2017.10.004
利用雷达反射率因子垂直廓线改进复杂地形下的台风降水估测精度
Improving Orographic Typhoon Quantitative Precipitation Estimation Through Radar-Based VPR Correction
摘要
Abstract
In this paper,an algorithm for improving the radar-based quantitative precipitation estimation (QPE) for orographic typhoon precipitation through vertical profiles of reflectivity (VPR) correction is developed.With this method the optimal ground reflectivity and the optimal Z-R relationship are obtained simultaneously by the iterative solution of the objective function (the global and regional optimal fitting of VPR).The vertical rainfall structure characteristics and the increase of rainfall in the complex terrain region are fully considered and well corrected.Three typical typhoon cases are selected to verify the accuracy of this newly established method.The results show that the algorithm can display non-uniform VPR characteristics of the different regions of the ocean,plain and complex terrain region,being consistent with the observed structure of the low-layer precipitation clouds.Compared with other Z-R estimation algorithms,this improved scheme could better improve QPE in the complex terrain region.The correlation coefficient between the rainfall estimated by the new algorithm and the rain gauge observations is as high as 0.85-0.94 and the estimation error is reduced by 50％ or so.关键词
复杂地形台风降水/雷达垂直反射率因子廓线/雷达定量降雨估测Key words
orographic typhoon precipitation/ vertical profiles of reflectivity/ radar QPE (quantitative precipitation estimation)分类
天文与地球科学引用本文复制引用
黄旋旋,朱科锋,赵坤..利用雷达反射率因子垂直廓线改进复杂地形下的台风降水估测精度[J].气象,2017,43(10):1198-1212,15.基金项目
公益性行业(气象)科研专项(GYHY201506006)、国家自然科学青年基金项目(41405100)、宁波市科技计划项目(2015C50054)、宁波市气象科技计划项目(NBQX2014011B)及浙江省科技厅公益项目[2016C33G20400061(2016C33012)]共同资助 （气象）
