云中积冰过程微物理参量演变规律的数值模拟  

Numerical simulations of microphysical properties evolution of the in-cloud icing process

作　　者：周悦[1,2,3] 周月华[1] 牛生杰[2,3] 吕晶晶[2,3] 

机构地区：[1]武汉区域气候中心,湖北武汉430074 [2]南京信息工程大学大气物理学院,江苏南京210044 [3]气象灾害教育部重点实验室(南京信息工程大学),江苏南京210044

出　　处：《大气科学学报》2014年第4期441-448,共8页Transactions of Atmospheric Sciences

基　　金：国家自然科学基金资助项目(41375138);国家重点基础研究发展计划(2013CB430206);湖北省气象局年轻科技人员专项(2013Q02)

摘　　要：利用耦合Thompson参数化物理方案的WRF(weather research and forecasting)中尺度数值模式,对发生在2008/2009年和2009/2010年冬季恩施雷达站处三次积冰过程的边界层特征和云雾微物理量进行了模拟,并与实测结果进行了对比分析。模拟结果较好地反映了恩施雷达站上空多逆温影响的温度层结特征;云水质量浓度和云雾滴中值体积直径的模拟值与观测值的平均绝对误差分别为10-2 g·m-3和3.8μm;恩施雷达站上空存在一个质量浓度为0.3 g·m-3左右的高值中心,其逐渐下移接地,给积冰过程带来充足水汽,且此时通常也有降雨出现。The microphysical properties and boundary layer characteristics of three icing processes thattook place at Enshi radar station in the winter of 2008 and 2009 was simulated by using the WeatherResearch and Forecasting （WRF） mesoscale model coupled with the Thompson microphysical scheme,and the results were compared with the observational data.The results showed that the simulations couldwell reflect the appearance of inversion layer over the radar station. The mean absolute errors of massconcentrations of cloud water and median volume diameter of cloud/fog droplets between simulationsand observations were 10-2 g · m-3 and 3.8 m,respectively.There was a high center whose mass con-centration was 0. 3 g · m-3 over the radar station, and it moved to the ground gradually, bringing suffi-cient droplets and precipitation to the ice accretion processes.

关 键 词：云中积冰 WRF模式 中尺度数值模拟 液水含量 中值体积直径 

分 类 号：P426.51[天文地球—大气科学及气象学]