辽宁地区LAPS系统及其在暴雨个例中的应用

Introduction of LAPS and its application in a rainstorm case in Liaoning province

辽宁局地分析和预报系统(Liao Ning-Local Analysis and Prediction System,LN-LAPS)经本地移植后,可以融合T639预报场、高空探测、自动气象站、风云卫星和多普勒雷达等资料,输出空间分辨率为3 km×3 km的分析场。本文主要介绍了LN-LAPS的基本框架和设计原理,同时针对2013年8月16日辽宁省抚顺地区的一次暴雨过程,探讨LN-LAPS产品的适用性。结果表明:LN-LAPS融合多源观测资料后输出的分析场可以识别对流系统的中小尺度特征,且有助于订正数值模式预报的降水落区和降水强度。环境中存在极强的上升运动,伴随充足的水汽和不稳定能量,可以指示抚顺市清原县特大暴雨过程的发生,且云微观特征和雷达回波特征也可以从多个方面体现此次暴雨过程的极端性。

After localization,the LN-LAPS(LiaoNing Local Analysis and Prediction System)can assimilate the prediction field of T639and the radiosonde,automatic weather station,FY satellite and Doppler radar data,and output an analyzing field with3km×3km spatial resolution.The basic framework and designing theory of the LN-LAPS were introduced,and its applicability in a rainstorm event occurring over Fushun city of Liaoning province on August16,2013,was discussed.The results show that the analyzing field produced by the LN-LAPS assimilating with multiple observations can reveal the features of meso and small scale convective systems,and help to correct the precipitation region and intensity predicted by the numerical weather prediction models.The strong ascending motion accompanying with abundant water vapor and instability energy in the surroundings indicate the occurrence of this rainstorm.Meanwhile,the cloud microphysical characteristics and radar echo point out the extreme property of this rainstorm process.