APEC会议前后京津冀空气污染物时空变化特征

发布时间：2018-01-08 23:27

本文关键词：APEC会议前后京津冀空气污染物时空变化特征　出处：《科技导报》2016年24期 　论文类型：期刊论文

【摘要】：以2014年北京APEC会议前后京津冀地区的PM_(2.5)、SO_2、NO_2监测数据为基础,通过最优空间插值得到该地区空气污染物质量浓度的空间分布变化图,采用空间自相关与核密度分析法研究了污染物分布的空间差异和变化规律。结果表明,京津冀空气污染物质量浓度具有显著的空间正相关与空间集聚特性,城市群空气污染空间关联密切,PM_(2.5)热点集中在北京南部、天津、石家庄和保定等地,SO_2热点集中在保定、天津、唐山和石家庄等地,NO_2热点集中在北京-天津-唐山片区和保定-石家庄-邢台片区;不同时段空气污染物质量浓度差异显著,APEC会议前及期间,在冷空气活动与减排措施的双重作用下,污染物质量浓度显著降低,高密度热点区均逐渐向中、低密度区转化,而APEC会议后,受冷空气影响良好空气质量得以短期维持,但污染反弹现象较快出现,高密度热点区污染迅速加强并扩展。
[Abstract]:Based on the monitoring data of PM2. 5 and SO2No2 in Beijing-Tianjin-Hebei region before and after the Beijing APEC meeting in 2014. The spatial distribution and variation of air pollutant concentration in this area were obtained by optimal spatial interpolation. The spatial difference and variation law of pollutant distribution were studied by spatial autocorrelation and nuclear density analysis. The concentration of air pollutants in Beijing-Tianjin-Hebei has significant spatial positive correlation and spatial agglomeration. The hot spots of Shijiazhuang and Baoding are concentrated in Baoding, Tianjin, Tangshan and Shijiazhuang are located in Beijing-Tianjin-Tangshan and Baoding Shijiazhuang-Xingtai. The difference of air pollutant concentration in different periods was significant. Under the dual action of cold air activity and emission reduction measures, the pollutant concentration decreased significantly before and during APEC meeting. The high density hot spots were gradually transformed to the middle and low density areas, and after the APEC meeting, the good air quality affected by the cold air could be maintained for a short time, but the phenomenon of pollution rebound appeared quickly. The pollution of high density hot spots is rapidly strengthened and expanded.
【作者单位】：中国矿业大学(北京)地球科学与测绘工程学院;中南大学地球科学与信息物理学院;
【基金】：国家重点基础研究发展计划(973计划)项目(2011CB707102) 江苏省优势学科(PAPD)及双创团队项目
【分类号】：X51
【正文快照】： 2014年11月5—11日,亚太经济合作组织(APEC)峰会在北京召开。APEC会议期间,北京及周边5省市按“两圈、两阶段”总体部署,实施了多项减排措施[1],有效地保障了北京空气质量,实现了“APCE蓝”。该事件是继2008奥运之后,研究人为控制与政策干预下京津冀(简称BTH)城市间空气污染物

【相似文献】