气象科学2017，Vol.37Issue(5)：610-618,9.DOI:10.3969/2016jms.0066
改进后TREC外推方法在台风临近降雨预报中的应用
The improved TREC algorithm and its application to the precipitation now-casting for landfall typhoon
摘要
Abstract
In this study,a Continuity of Laplace TREC vectors (CLTREC) algorithm based on traditional COTREC was proposed.The new algorithm adds two improvements:(1) the echo continuity constraint conditions;(2) the total variation reconstruction of motion vectors.Three typhoon landfall cases were selected to verify the new method.The evaluation results show that the quality of the extrapolated motion vector field obtained by CLTREC is better and more continuous than that by COTREC and the characteristics of typhoon circulation is more reasonable.The rainfall field obtained by CLTREC is much closer to the actual rainfall spatial distribution and strength characteristics.The improvement effect of one hours is the most obvious,whose correlation coefficient up to more than 0.7.Overall,compared with the traditional COTREC algorithm,the CLTREC algorithm can improve the accuracy of the typhoon precipitation nowcasting.关键词
多普勒天气雷达/TREC/登陆台风/短时临近降雨预报Key words
Doppler radar/TREC/Landfall typhoon/Precipitation now-casting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..改进后TREC外推方法在台风临近降雨预报中的应用[J].气象科学,2017,37(5):610-618,9.基金项目
公益性行业(气象)科研专项(GYHY201006007) （气象）
国家自然科学基金资助项目(41322032 （）
41275031 （）
41405100) （）
宁波市科技计划项目(2015C50054) （2015C50054）
宁波市气象科技计划项目(NBQX2014011B)项目 （NBQX2014011B）
宁波市自然科学基金资助项目(2013A610) （2013A610）
