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基于Model-3/CMAQ模式对本溪市大气细颗粒物的数值模拟
秦思达,惠秀娟,夏广锋,王淑兰,等
作者单位E-mail
秦思达 辽宁大学环境学院 qinsida46@163.com 
惠秀娟 辽宁大学环境学院 2892747869@qq.com 
夏广锋 辽宁省环境科学研究院  
王淑兰 中国环境科学研究院  
摘要:
为掌握辽宁省中部城市群大气污染形势,分析区域雾霾成因,本研究应用气象模式WRF耦合空气质量模式CMAQ对本溪市2016年PM2.5空间分布特征、化学组分特征及主要污染源贡献情况进行分析。研究在MEIC排放源清单基础上,结合2015年辽宁省环境统计数据等信息,建立了高时空分辨率的本溪市工业源、移动源、居民源、农业源网格化污染源清单。研究显示,本溪市工业排放SO2、NOx、TSP分别达到5.2×104t、4.1×104t、16.1×104t。1月PM2.5浓度明显高于7月,空间分布均呈现“西高东低”态势,高值区出现在人口稠密的市区附近。1月PM2.5浓度贡献主要源为钢铁(35.7%)>供暖(12.5%)>居民(7.5%)>移动(5.2%)>秸秆(2.0%)>电力(0.4%);7月PM2.5浓度贡献主要源为钢铁(48.6%)>移动(9.2%)>建材(3.5%)>居民(2.8%)>电力(1.5%)。受气候、地貌及大气污染物排放特征影响,1月区域传输特征明显,外来源贡献为24%,高于7月的14%。另外,本溪市PM2.5组分中二次粒子(SO42-、NO3-、NH4+)1月与7月占比分别为29%与32%,碳组分(OC、EC)占比分别为43%的37%,碳气溶胶污染严重。
关键词:  CMAQ  PM2.5  源解析  辽宁省中部城市群
DOI:
分类号:
基金项目:辽宁省中央引导地方科技发展专项;辽宁省中部城市群雾霾分析及对策研究(一期)项目
A Numerical Study of PM2.5 Pollution in Benxi City based on Model-3/CMAQ
Qin Sida,Hui Xiujuan,Xia Guangfeng,Wang Shulan,et al
Abstract:
In order to master air pollution situation in the central urban agglomeration of Liaoning Province and analyze the causes of regional haze, WRF (Weather Research and Forecasting Model) in combination with CMAQ (Congestion Mitigation and Air Quality Model) are adopted for the research to analyze Benxi’s spatial distribution characteristics, chemical constituent and the main contributed pollutant sources of PM2.5 for the year2016. Benxi’s high spatial resolution list of pollutant sources, including industrial source, mobile source, resident source and agricultural source, is generated based on MEIC (Multi-resolution Emission Inventory for China) and Liaoning environmental statistics of 2015. According to the result, industrial pollution of SO2,NOx, TSP are 52, 41, 161 thousand tons respectively, among which, emissions from steel industry accounted for relative high proportion. Benxi’s PM2.5 concentration in January is obviously higher than that in July; spatial distribution of PM2.5 in west area is higher than that in east area. The high-concentration area occurs in main city. The main contribution of PM2.5 concentration in July is Steel(35.7%)>Heating (12.5%)>Resident(7.5%)>Mobile(5.2%)>Straw(2.0%)>Electricity(0.4%);Onthe other hand, Steel (48.6%)>Mobile (9.2%)>Concrete (3.5%)>Resident (2.8%)>Electricity(1.5%) in January. Affected by climate, landscape and characteristics of pollutant distribution, transmission is obvious in January, external source contribution is 24%, which is higher than that in July (14%). Besides, secondary particle of Benxi’s PM2.5(SO42-,NO3-,NH4+)occupy 29% and 32% in January and July, carbon components(OC,EC) occupy 43% and 37%.
Key words:  CMAQ  PM2.5  source apportionment  urban agglomeration of central Liaoning Province