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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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2013年北京市PM2.5的时空分布
DOI: 10.11821/dlxb201501009, PP. 110-120
Keywords: 北京,PM2.5,时间分布,空间分布,前体物,大气氧化性
Abstract:
对2013年北京市35个自动空气质量监测子站的PM2.5数据进行分析,探讨PM2.5的时间分布特征、空间分布特征以及与前体物和大气氧化性的相关性关系。结果表明,PM2.5浓度由高到低的季节依次是冬季、春季、秋季和夏季,平均浓度分别为122.8μg·m-3、85.1μg·m-3、84.9μg·m-3和79.1μg·m-3;各类监测站中浓度由高到低的依次是交通站、城区站、郊区站和区域站,平均浓度分别为102.2μg·m-3、91.8μg·m-3、89.1μg·m-3和88.7μg·m-3。PM2.5月均浓度呈波浪型分布,在1月份、3月份、6月份和10月份各出现一个峰值。全年来看,交通站PM2.5的日变化规律呈单峰型分布,其他站点呈双峰型分布。分地区来看,年均PM2.5浓度由高到低的依次是东南部、西南部、城六区、东北部和西北部。PM2.5浓度与NO2、SO2和OX浓度均为显著正相关,表明前体物和大气氧化性对PM2.5浓度有显著影响。
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