不同陆面方案对雷州半岛一次局地性暴雨的影响分析  

The Effects of Different Land Surface Schemes on a Local Heavy Rain over Leizhou Peninsula

作　　者：张仲 徐峰[2] 

机构地区：[1]廉江市气象局,广东湛江524400 [2]广东海洋大学海洋与气象学院,广东湛江524088

出　　处：《广东气象》2016年第4期41-45,共5页Guangdong Meteorology

基　　金：湛江市气象局项目(2014B09)

摘　　要：利用ERA-interim再分析资料、逐小时观测实况资料、FNL再分析资料研究了雷州半岛地区一次局地性暴雨的成因,并利用WRF模式研究了3种不同陆面过程方案对该次局地性暴雨的模拟效果。研究结果表明:该次局地性暴雨是弱冷空气与西南暖湿气流交汇所形成的切变线降水;3种陆面方案都较好地模拟出了雷州半岛中部的降水中心位置,不同方案对整个降水的分布形状模拟相差不大,对强降水中心的范围和形状模拟不同,Noah方案和RUC方案的降水范围比Thermal diffusion方案要好;3种陆面方案主要是通过影响地表能通量分配形式进而改变暴雨区的强度和中心位置。Based on ERA-interim reanalysis data, FNL data and observation data, we studied the reason of a local heavy rain that happened on Leizhou Peninsula and the effects of three kinds of land surface schemes on this heavy rain. The resuh is shown as follows. This local heavy rain is of shear line precipitation, which happened due to the interaction between weak cold air and warm southwesterly air. The Noah and RUC schemes are better than a thermal diffusion scheme in simulating precipitation range. The effect of different land surface schemes on this local heavy rain is changing the intensity and center position of the heavy rain by influencing the distribution of surface energy flux.

关 键 词：天气学 局地性暴雨 数值模拟 陆面方案 雷州半岛 

分 类 号：P44[天文地球—大气科学及气象学]