华东地区对流层O_(3)和前体物HCHO及NO_(2)的时空特征  

Temporal and Spatial Characteristics of Troposphere O_(3) and Precursors HCHO and NO_(2) in East China

作　　者：王晓雯 刘旻霞[1] 王扬 宋宜凯 WANG Xiao-wen;LIU Min-xia;WANG Yang;SONG Yi-kai(College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730070,China)

机构地区：[1]西北师范大学地理与环境科学学院,兰州730070

出　　处：《环境科学》2023年第9期4809-4818,共10页Environmental Science

基　　金：国家自然科学基金项目(31760135);甘肃省自然科学基金项目(20JR10RA089);甘肃省林业和草原科技创新项目(KJCX2021005)。

摘　　要：通过OMI遥感卫星数据分析华东地区2005~2021年大气对流层臭氧(O_(3))、二氧化氮(NO_(2))和甲醛(HCHO)柱浓度的时空特征,利用后向轨迹模型(HYSPLIT)探究其来源.结果表明:①17年间,对流层O_(3)柱浓度平稳增加,2010年上升到最大值,之后呈现一种波动起伏的状态;NO_(2)在2005~2012年呈增加趋势,2012~2021年缓慢下降;HCHO柱浓度由2005年的1.15×10^(16) molec·cm^(-2)呈现增长趋势,上升到2021年的1.8×10^(16) molec·cm^(-2).②在空间上,3种污染物柱浓度总体上呈现北高南低的空间格局,北部为高高聚集区域,中部为无特征区域,南部为低低聚集区域.③O_(3)的敏感性呈现为:春季η<2.3,属于VOCs控制区;夏季η<4.2,表现为大部分地区是NOx⁃VOCs协同控制区,少部分地区是VOCs控制区;秋季η<4.2,主要为VOCs控制,极少部分为NOx⁃VOCs协同控制区;冬季η<2.3,为VOCs控制区,山东省以VOCs控制为主.④因2005~2021年O_(3)在山东省呈现为高高聚集,所以选取2021年山东省的省会城市济南市进行O_(3)来源解析,2021年济南市的O_(3)浓度增加有两个方面,一是通过远距离的气团输送主要来自于江苏省的连云港市和河北省的沧州市;二是近距离的气团输送来自于济南市附近城市的污染和黄海、渤海经济区,且聚集性分析与潜在源贡献因子算法(PSCF)和权重轨迹分析法(CWT)有相同的结果.Based on OMI remote sensing satellite data,the temporal and spatial characteristics of tropospheric ozone(O_(3)),nitrogen dioxide(NO_(2)),and formaldehyde(HCHO)concentrations in East China from^(2)005 to 2021 were analyzed,and the backward trajectory(HYSPLIT)model was used to explore their sources.The results showed that①during the 17 years,the tropospheric O_(3) concentration steadily increased,reached the maximum value in 2010,and then showed a fluctuating and undulating state.NO_(2) showed an increasing trend from 2005 to 2012 and slowly decreased from 2012 to 2021.The average HCHO concentration showed an increasing trend from 1.15×10^(16) molec·cm^(-2) in 2005 to 1.8×10^(16) molec·cm^(-2) in 2021.②In terms of spatial characteristics,the concentrations of the three pollutants generally showed a pattern of high concentration in the north and low concentration in the south,with a high concentration in the north,uncharacteristic concentration in the middle,and low concentration in the south.③The sensitivity of O_(3) was as follows:η<2.3 in spring,which belonged to the VOCs control area;η<4.2 in summer,showing that most areas were NOx⁃VOCs coordinated control areas and a few areas were VOCs control areas;η<4.2 in autumn,which was primarily controlled by VOCs,with a few of them being NOx⁃VOC synergistic control areas;andη<2.3 in winter,which was a VOCs⁃controlled area.VOCs were primarily controlled in Shandong Province.④Owing to the high concentration of O_(3) in Shandong Province from 2005 to 2021,Jinan,the capital city of Shandong Province in 2021,was selected for ozone source analysis.The O_(3) concentration increased in Jinan in 2021 owing to two aspects.First,the long⁃distance air transportation primarily originated from Lianyungang City in Jiangsu Province and Cangzhou City in Hebei Province.Second,the close air mass transport originated from the pollution of cities near Jinan and the economic zones of the Yellow Sea and Bohai Sea,and the aggregation analysis results corresponded with

关 键 词：华东地区 臭氧(O_(3)) 敏感性 HYSPLIT模型 潜在源贡献 

分 类 号：X515[环境科学与工程—环境工程]