北京城区PM2.5及主要污染气体“周末效应”和“假日效应”研究

被引:82
作者
雷瑜 [1 ]
张小玲 [1 ,2 ]
唐宜西 [1 ,2 ]
范广洲 [1 ,3 ]
周定文 [1 ,4 ]
机构
[1] 成都信息工程学院高原大气与环境四川省重点实验室
[2] 中国气象局京津冀环境气象预报预警中心
[3] 南京信息工程大学气象灾害预报预警与评估协同创新中心
[4] 中国核工业集团公司
关键词
北京; 污染物; 浓度; 工作日; 周末; 节假日;
D O I
10.13671/j.hjkxxb.2014.0948
中图分类号
X513 [粒状污染物];
学科分类号
0706 ; 070602 ;
摘要
利用2009—2012年北京城区海淀宝联站6种污染物(PM2.5、NO、NO2、O3、CO和SO2)的连续监测数据,研究了污染物浓度的周循环变化规律,以及春节、国庆节假日期间和假日前后污染物浓度变化的差异.结果表明,北京城区O3浓度存在周末高于工作日的显著"周末效应"现象,其它污染物则表现出周末低于工作日的"周末效应"现象;国庆节较长假期存在与"周末效应"相类似的"假日效应",即假日期间污染物浓度明显低于非假日期间(O3相反).而春节期间PM2.5、CO、SO2出现"反常"浓度(污染物浓度在假日期间高于非假日期间),可能与春节期间烟花爆竹燃放有关.从污染物浓度日变化特征分析,污染物浓度高峰期与人类活动高峰期时间基本一致,而污染物在周末和工作日出现的浓度差异现象也与人类活动的周循环差异现象相吻合,NO、NO2和CO的小时平均浓度在周末和工作日的最大偏差出现在08:00,分别为-19.8%、-14.9%和-13.9%,说明北京城区出现污染物浓度的周循环变化特征和日变化特征与人类活动密切相关.
引用
收藏
页码:1520 / 1528
页数:9
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