Comparative evaluation of the impact of GRAPES and MM5 meteorology on CMAQ prediction over Pearl River Delta, China  

作　　者：Tao Deng Yiang Chen Qilin Wan Yanxia Zhang Xuejiao Deng Yanyan Huang Guangfeng Dai Fei Li 

机构地区：[1]Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction,China Meteorological Administration,Guangzhou 510080,China [2]Key Laboratory of Meteorological Disaster,Ministry of Education,Joint International Research Laboratory of Climate and Environment Change,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing University olin formation Science &Technology,Nanjing210044,China

出　　处：《Particuology》2018年第5期88-97,共10页颗粒学报（英文版）

基　　金：the National Key R&D Program of China (No.2016YFC0203305);Natural Science Foundation of China (41775037).

摘　　要：The community multiscale air quality (CMAQ) model was used to forecast air quality over the Pearl River Delta region from December 2013 to January 2014.The pollution forecasting performance of CMAQ coupled with two different meteorological models,i.e.,the global/regional assimilation and prediction system (GRAPES) and the fifth-generation mesoscale model (MM5),was assessed by comparison with observational data.The effects of meteorological factors and physicochemical processes on the forecast results were discussed through process analysis.The results showed that both models exhibited good performance but that of GRAPES-CMAQ was better.GRAPES was superior in predicting the overall variation tendencies of meteorological fields,but it showed large deviations in atmospheric pressure and wind speed.This contributed to the higher correlation coefficients of the pollutants with GRAPES-CMAQ but with greater deviations.The underestimations of nitrate and ammonium salt contributed to the underestimations of both particulate matter and extinction coefficients.Source emissions made the only positive contributions to surface layer SO2,CO,and NO.It was found that O3 originated primarily from horizontal and vertical transport and that its consumption was predominantly via chemical processes.Conversely,NO2 was found derived primarily from chemical production.

关 键 词：AIR QUALITY Numerical simulation Global/regional assimilation and PREDICTION system (GRAPES) Community multiscale AIR QUALITY (CMAQ) Process analysis 

分 类 号：O3[理学—力学]