不同辐射参数化方案对南京地区大雾过程数值模拟的影响  

Influence of Different Radiation Parameterization Schemes on Numerical Simulations of Heavy Fog Events on Expressways in Jiangsu Province

作　　者：贾思雨 包云轩[1,2] 袁成松[2,3] 周林义[2,3] 焦圣明[2,4] Jia Siyu;Bao Yunxuan;Yuan Chengsong;Zhou Linyi;Jiao Shengming(Collaborative Innovation Center on Forecast Meteorological Disaster Warning and Assessment,Nanjing University of Information Science and Technology,Nanjing 210044;Key Laboratory of Transportation Meteorology,Jiangsu Meteorological Institute,Nanjing 210009;Jiangsu Meteorological Institute,Nanjing 210009;Jiangsu Meteorological Information Center,Nanjing 210009)

机构地区：[1]南京信息工程大学气象灾害预报预警与评估协同创新中心,南京210044 [2]中国气象局交通气象重点开放实验室,南京210009 [3]江苏省气象科学研究所,南京210009 [4]江苏省气象信息中心,南京210009

出　　处：《气象科技》2018年第5期932-942,共11页Meteorological Science and Technology

基　　金：国家公益性行业(气象)科研专项(GYHY201406029;GYHY201306043);江苏省科技支撑计划(BE2015732);江苏省气象局北极阁基金(BJG201404)资助

摘　　要：为了比较不同长、短波辐射参数化方案对江苏省大雾过程的模拟效果,本文利用WRF模式,通过设计不同长、短波辐射参数化方案,对江苏省2015年5月18—21日和12月20—21日2次典型大雾过程进行了数值模拟,讨论了模式中不同长、短波辐射参数化方案对江苏省大雾过程的模拟影响。采用平均绝对误差(MAR)、均方根误差(RMSE)、皮尔逊相关系数(r)及中国气象局颁布的雾区预报规定,评价得到不同条件的最优模拟方案。结果表明:(1)热力条件与水汽条件,模拟最优方案为长波GFDL方案与短波RRTMG方案组合。(2)动力条件,最优辐射参数化方案组合为CAM方案与FLG方案组合。(3)雾区的模拟,效果最好的方案为长波GFDL方案与短波RRTMG方案的组合。In order to compare the effects of different long-wave radiation and short-wave radiation parameterization schemes on the numerical simulations of radiation fog processes,in this paper,the two typical heavy radiation fog events occurred in Jiangsu Province in spring and autumn 2015 are screened respectively and the Weather Research and Forecast Model（WRF）is used in the numerical simulations of these two radiation fog processes through the design of different long-wave and short-wave radiation parameterization schemes.The influences of these long-wave and short-wave radiation parameterization schemes on the numerical simulation of the fog processes are discussed.The mean absolute error（MAR）,the root mean square error（RMSE）,the Pearson correlation coefficient and Fog Grade and the Fog Area Forecast Regulations promulgated by the China Meteorological Administration are used to evaluate these simulation schemes,and the optimal simulation schemes under the different conditions are obtained.The results show：（1）In the simulations of the relative humidity and the dew point temperature as the vapor conditions of fog occurrence or in the simulations of the air temperature and surface temperature as the thermodynamic conditions,the optimal scheme is the combination of GFDL scheme in the long wave radiation with the RRTMG scheme in the short wave radiation.（2）In the simulations of the wind speed at the 10 mlevel,for the dynamic condition of fog engendering,the optimal scheme is the combination of CAM scheme in the long wave radiation with the FLG scheme in short wave radiation.（3）For the simulation of the fog area,the scheme combined with the best simulation effectiveness is the combination of the GFDL scheme in the long wave radiation with the RRTMG scheme in short wave radiation.

关 键 词：雾模拟 WRF模式 辐射参数化方案 评价指标 

分 类 号：P435[天文地球—大气科学及气象学]