广东省气象与源排放因素对PM_(2.5)浓度影响的数值模拟研究  

Numerical Simulation of the Impact of Meteorology and Emission on PM_(2.5) Concentration in Guangdong Province

作　　者：沈劲[1,2] 汪宇[1,2] 潘月云[1,2] 嵇萍[1,2] 陈多宏[1,2] 谢敏[1,2] 叶斯琪[1,2] 钟流举[1,2] SHEN Jin WANG Yu PAN Yueyun JI Ping CHEN Duohong XIE Min YE Siqi ZHONG Liuju(State Environmental Key Laboratory of Regional Air Quality Monitoring ,Guangdong Environmental Monitoring Center, Guangzhou 510308, China Guangdong Environmental Protection Key Laboratory of Secondary Air Pollution Research, Guangdong Environmental Monitoring Center ,Guangzhou 510308 ,China)

机构地区：[1]广东省环境监测中心国家环境保护区域空气质量监测重点实验室,广东广州510308 [2]广东省环境监测中心广东省环境保护大气二次污染研究重点实验室,广东广州510308

出　　处：《安全与环境工程》2017年第1期45-50,共6页Safety and Environmental Engineering

基　　金：国家科技支撑计划项目(2014BAC21B01;2014BAC21B03);国家自然科学基金项目(91544215);环保公益性行业科研专项项目(201409009);广东省空气质量预报预警系统建设项目(粤发改投资20155271)

摘　　要：为更好地区分大气污染物浓度变化中气象与源排放因素的影响,使用中尺度气象模型WRF和三维空气质量模型CAMx,通过固定源清单的方法模拟研究了广东省各地区不同时期气象因素对PM_(2.5)浓度变化的影响,并结合实测的PM_(2.5)浓度变化,计算出源排放因素对PM_(2.5)浓度的贡献。结果表明:相对于2014年,2015年广东省夏季的气象条件不利于PM_(2.5)浓度的下降,春季和秋季的气象条件有利于PM_(2.5)浓度的下降,就全年各季度平均而言,珠江口附近地区气象条件较有利于PM_(2.5)浓度的下降;源排放变化对肇庆市、韶关市和揭阳市等城市PM_(2.5)浓度变化有较强的削减作用,可使其浓度下降30%以上,显示这些城市的减排工作较为有效,深圳市、珠海市、东莞市、中山市与顺德区等市(区)PM_(2.5)污染改善主要是由于有利的气象条件的影响,源排放变化对珠海市和湛江市等城市污染起加剧的作用,表明不利的源排放变化抵消了部分有利气象条件对PM_(2.5)污染的改善作用,应加强对这些地区源排放的控制。To distinguish the influence of meteorology and emission on concentrations of air pollutants in Guangdong Province,this paper employs a mesoscale meteorological model WRF and a three dimensional air quality model CAMx with the fixed emission inventory to study the impact of meteorology on PM2.5 concentration change in different seasons. Combined with PM2.5 concentration change based on observations,the paper calculates the contribution of emission sources to PM2. 5 concentration change. The results indicate that compared with the year 2014,meteorological condition is unfavorable for PM2.5 concentration reduction in summer of 2015 but favorable in spring and autumn. On average, meteorological conditions nearby the Pearl River estuary are favourable to PM2.5 concentration reduction. Emission change in Zhao-qing,Shaoguan,and Jieyang plays an important role in PM2.5 concentration reduction,to an extent of above 30 percent,which indicates the emission reduction work takes effect in those areas. In Shenzhen,Zhuhai, Dongguan, Zhongshan and Shunde,PM2.5 concentration decreases mainly due to advantageous meteorologi- cal conditions. Emission change in Zhuhai and Zhanjiang intensifies the PM2.5 pollution,which means unfavorable emission change partially offsets the improving effects of advantageous meteorological conditions on PM2.5 pollution, so emission control should be strengthened in those areas.

关 键 词：气象 源排放 PM2.5浓度 WRF和CAMx模型 数值模拟 广东省 

分 类 号：X513[环境科学与工程—环境工程]