基于观测的沈阳市气溶胶光学特性对J[NO_(2)]、J[O^(1)D]的影响  

Effects of aerosol optical properties on J[NO_(2)]and J[O^(1)D]in Shenyang based on observations

作　　者：王男 孙学斌 刘闽 高木木 王佳音 侯乐 杜毅明 王闯 金东青 苏枞枞 WANG Nan;SUN Xuebin;LIU Min;GAO Mumu;WANG Jiayin;HOU Le;DU Yiming;WANG Chuang;JIN Dongqing;SU Congcong(Shenyang Ecological Environment Monitoring Center of Liaoning Province,Shenyang 110000,China)

机构地区：[1]辽宁省沈阳生态环境监测中心,沈阳110000

出　　处：《环境保护科学》2023年第5期123-129,共7页Environmental Protection Science

基　　金：沈阳市科学技术计划项目(20-206-4-10)。

摘　　要：文章基于2018年11月—2021年10月沈阳市大气复合污染立体监测超级站颗粒物光学特征观测数据、光解光谱仪观测数据及11个国控点位PM_(2.5)及O_(3)浓度数据,分析了沈阳市气溶胶光学特性及其对光化学反应的影响。结果表明,沈阳市PM_(2.5)的散射系数、吸收系数均呈冬季>秋季>春季>夏季的特征。秋季以散射型气溶胶为主,而夏季吸收型气溶胶的占比有所增加。夏、秋、冬季气溶胶粒子以细模态粒子为主;春季污染由粗模态和细模态的粒子共同导致。当PM_(2.5)>150时,J[NO_(2)]、J[O^(1)D]的最大值分别为0.005 s^(-1)、1.45e-5s^(-1),较PM_(2.5)≤35时,分别减少了16.3%和35.3%。当SSA一定时,J[NO_(2)]、J[O^(1)D]随AOD的增加而减小,二者间存在负相关关系。其中SSA≈1.0时(气溶胶为强散射型气溶胶),二者的相关性最显著。当AOD一定时,J[NO_(2)]、J[O^(1)D]随SSA的增加而增加,但二者无显著相关性。In this paper,the optical characteristics of aerosol and its effect on photochemical reactions in Shenyang were analyzed based on the optical characteristics of particulate matter observed at Shenyang Combined Atmospheric Pollution Monitoring Superstation from November 2018 to October 2021.The optical data of photodecomposition spectrometer and PM2.5 and O3 concentration data at 11 national control sites were also used to anaylze.The results showed that the scattering coefficient and the absorption coefficient of PM2.5 in Shenyang were winter>autumn>spring>summer.Scattering aerosols were dominant in autumn,while absorption aerosols increased in summer.Aerosol particles were mainly fine modal particles in summer,autumn and winter.Spring pollution was caused by both coarse and fine modal particles.When PM2.5>150,the maximum values of J[NO_(2)]and J[O^(1)D]were 0.005 s−1 and 1.45e-5 s−1,respectively,decreasing by 16.3%and 35.3%compared with PM2.5≤35.When SSA was constant,J[NO_(2)]and J[O^(1)D]decreased with the increase of AOD,and there was a negative correlation between them.When SSA≈1.0(aerosol is strongly scattering aerosol),the correlation between them was most significant.When AOD was constant,J[NO_(2)]and J[O^(1)D]increased with the increase of SSA,but there was no significant correlation between them.

关 键 词：观测 气溶胶光学特性 J[NO_(2)] [O^(1)D] 沈阳市 

分 类 号：X823[环境科学与工程—环境工程]