珠江三角洲SO2初始场同化试验研究  

Data assimilation experiment on SO_2 initial conditions in the Pearl River Delta

作　　者：陈懿昂 邓雪娇[2] 朱彬[1] 邓涛[2] 高郁东[2] CHEN Yi-ang;DENG Xue-jiao;ZHU Bin;DENG Tao;GAO Yu-dong(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 Meteorologi;Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction, Institute of Tropical and Marine Meteorology,China Meteorological Administration, Guangzhou 510080, China)

机构地区：[1]境变化国际合作联合实验室,气象灾害预报预警与评估协同创新中心,中国气象局气溶胶与云降水重点开放实验室,江苏南京210044 [2]中国气象局广州热带海洋气象研究所,广东省区域数值天气预报重点实验室,广东广州510080

出　　处：《中国环境科学》2017年第5期1610-1619,共10页China Environmental Science

基　　金：国家自然科学基金资助项目(41475105);国家科技支撑计划课题(2014BAC16B06);科技部公益性(气象)行业项目(GYHY201306042);中国气象局气候变化专项项目(CCSF201531);广东省科技计划项目(2015A020215020);广东省气象局科技创新团队计划项目(201506)

摘　　要：基于WRF-CMAQ空气质量模式系统,采用最优插值法(OI)和集合平方根滤波法(EnSRF)对2013年12月广东珠江三角洲地区污染物SO_2进行初始场同化试验.背景场误差水平分布高值区主要位于江门一带,垂直分布在边界层内较大,400m以下基本不变,400m以上随高度增加而递减.对比OI与EnSRF两种方法同化前后SO_2浓度场变化,表明同化观测资料调整了污染物浓度场的分布型态,与观测场更为吻合,两种方法都能为模式提供与实际更加接近的初始场.敏感性试验表明最优插值法的最优水平尺度为20km;同化站点和检验站点的均方根误差平均下降率分别达到73%和39%.Based on the WRF-CMAQ air quality model,the pollutant SO2in the Pearl River Delta Region in December2013was assimilated to optimize the initial conditions using the optimal interpolation approach(OI)and the ensemble square root filter(EnSRF).The high values of the background error were mainly located in Jiangmen region in horizontal direction and were larger within the boundary layer in vertical direction.The background error was nearly constant below400m and decreased with height above400m.By comparing the SO2concentration fields using assimilation with those not using assimilation,the results showed that assimilation could adjust the distribution pattern of the pollutant and make it more consistent with the observation field.Both assimilated methods could offer an initial field closer to the true situation.The sensitivity test showed that the optimal horizontal scale of the optimal interpolation method was20km.The root mean square error decreasing percentage between the assimilation sites and the verification sites reached73%and39%,respectively.With the number of the assimilation site increasing,the optimization of the assimilation site had a declining trend.

关 键 词：资料同化 SO2 最优插值法(OI) 集合平方根滤波法(EnSRF) 珠江三角洲 

分 类 号：X511[环境科学与工程—环境工程]