气象学报2011，Vol.69Issue(1)：170-180,11.
单多普勒雷达反演热带气旋近中心风场的VAP扩展应用方法
An extended application of the VAP method for wind field retrieval near the tropical cyclone center with single-Doppler radar data
摘要
Abstract
In the attempt to employ the VAP and extended VAP (EVAP) method for retrieving wind fields based on observation data from the mobile weather radar (CINRAD / CCJ) during the typhoon “Weipa”, some unreasonable wind directions and velocities have been found after the retrieval. The reason might be attributed to the assumptions assumed by the above methods that are not well representative for the actual situation of violent change of wind speed and direction near the tropical cyclone center. According to the characteristics of approximately axial symmetry circulation of a tropical cyclone, especially in its mature stage, this paper presents a new assumption, namely,the assumption of uniform change of wind direction with stationary wind speed on the circle equidistant from the tropical cyclone center.The authors called it as EVAPTC (EVAP for Tropical Cyclone) method under the new assumption. The experimental results of an ideal model and the retrieval results of an actual case all show that the EVAPTC method is simple and convenient with relatively small retrieval error. It can basically reflect the circulation features near the typhoon center, especially the wind field in the spiral band. As an example,in the case of typhoon “Weipa”, there are obvious convergent airs flowing into the inner side of spiral band with the flow on the periphery of the spiral tail shifting around the clouds and wind disturbance existing in the strong echo areas of spiral band, etc.关键词
单多普勒雷达/风场反演/热带气旋Key words
Single-Doppler radar/ Wind retrieval/ Tropical cyclone分类
天文与地球科学引用本文复制引用
罗昌荣,孙照渤,魏鸣,池艳珍..单多普勒雷达反演热带气旋近中心风场的VAP扩展应用方法[J].气象学报,2011,69(1):170-180,11.基金项目
福建沿海及台湾海峡气象防灾减灾服务体系项目. （）
