2016年长沙市环境空气质量的“周末效应”及“假日效应”  

Holiday Effects on Ambient Air Quality in Changsha During 2016

作　　者：周国治 宋冰冰 罗岳平 毕军平 ZHOU Guozhi;SONG Bingbing;LUO Yueping;BI Junping(Hunan Environmental Monitoring Centre,Changsha 410019,China)

机构地区：[1]湖南省环境监测中心站,湖南长沙410019

出　　处：《中国环境监测》2018年第4期68-76,共9页Environmental Monitoring in China

基　　金：污染区域大气重金属原子荧光光谱测量技术在线监测应用示范(2014YQ06077309)

摘　　要：通过获取2016年长沙市连续在线观测得到的PM10、PM_(2.5)、NO_2、O_3、CO和SO_2逐时浓度资料,对工作日、周末、节假日(尤其是春节)的空气质量优良天数、污染物浓度变化特征进行对比分析,长沙市2016年6项污染物均表现出一定的"周末效应"现象,周末日平均浓度均低于工作日及全年的日平均浓度,其中PM_(2.5)最为明显;PM_(10)和PM_(2.5)浓度均星期一最高,星期六最低,CO和SO_2浓度周末也均处于相对最低水平,NO_2和O_3在周末的平均浓度略低于工作日水平或与其持平。国庆假期,由于城区人口、车辆减少,长沙大气环境质量相对较好,而春节假期,由于受到烟花爆竹集中燃放的影响,PM_(10)、PM_(2.5)和SO_2浓度远超过全年平均水平,这在一定程度上说明人类活动对污染物浓度及大气环境质量变化具有一定的影响力。Based on the PM10,PM2.5,NO2,O3,CO and SO2 concentrations in Changsha obtained from the continuous online monitoring system in 2016,the variation features of pollutants concentration and excellent days on weekdays,weekend and holiday especially Spring Festival were analyzed. It showed that there were weekend effects with six pollutants in Changsha. The average concentrations of the pollutants,especially PM2.5,on weekend were lower than those of weekdays and annual average value. PM10 and PM2.5 concentrations are highest on Monday and lowest on Saturday. On weekend,the concentrations of CO and SO2 remain lowest level,the average concentrations of NO2 and O3 were a little lower than or similar with those on weekdays.During National Day,the air quality in Changsha was very good due to the emission reduction from vehicles. However,PM10,PM2.5 and SO2 concentrations were far above annual average level that ascribe to firecrackers during Spring Festival. It mainly occurred at midnight,dawn and dusk,which indicated that pollutants concentrations and air quality are effected by human activities to some extent.

关 键 词：长沙 环境空气 工作日 周末 节假日 

分 类 号：X823[环境科学与工程—环境工程]