苏州城市气溶胶和臭氧相互作用的观测分析  

Observation Analysis on Aerosol and Ozone Interaction in Suzhou

作　　者：李佳慧[1] 刘红年[1] 王学远[1] 胡森林[2] LI Jia-hui;LIU Hong-nian;WANG Xue-yuan;HU Sen-lin(School of Atmospheric Science, Nanjing University, Nanjing, Jiangsu 210023, China;Hefei Meteorological Service, Hefei, Anhui 230041, China)

机构地区：[1]南京大学大气科学学院,江苏南京210023 [2]合肥市气象局,安徽合肥230041

出　　处：《环境监测管理与技术》2019年第1期29-33,共5页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(41575141);国家重点研发计划基金资助项目(2017YFC0209600);国家重点基础研究发展规划"九七三"基金资助项目(2014CB441203);江苏省气候变化协同创新中心基金资助项目

摘　　要：利用2014年苏州地区观测资料对城市气溶胶与O_3之间的相互作用进行研究,结果表明:苏州市晴空指数(CI)与PM_(10)、PM_(2.5)呈显著负相关; PM_(10)、PM_(2.5)质量浓度每增加1μg/m3,晴天条件下白天向下短波辐射(DSR)分别下降1. 48 W/m2和1. 52 W/m2; DSR与O_3呈显著正相关; O_3与PM_(10)、PM_(2.5)呈负相关,表明气溶胶对O_3浓度存在衰减作用。2014年11月10日—12日个例研究表明,在到达地面的DSR几乎不变的情况下,气溶胶与O_3之间发生非均相化学反应,造成O_3浓度降低。2014年12月13日—14日个例研究表明,气溶胶通过对太阳辐射的消光作用,造成到达地面的DSR减弱,O_3浓度降低。The observation data from Suzhou were studied on the interaction between aerosol and ozone. The results showed that PM 10 and PM2.5 were negatively correlated with clearness index. On average, in the daytime of fine weather, a 1 μg/m^3 increase in PM10 or PM2.5 concentration was associated with 1.48 W/m^2 or 1.52 W/m^2 decrease in downward shortwave radiation (DSR), respectively. Ozone was significantly positive correlated with DSR, and negative correlated with PM10 or PM2.5 . Aerosol had the effect on O3 reduction. Case study showed that during the research period of November 10th to 12th, 2014, when the DSR reaching to the ground was almost unchanged, heterogeneous chemical reaction happened between aerosol and O3 , resulting in decreasing of O3 concentration. According to case study through December 13th to 14th, 2014, the DSR on the ground and ozone decreased by aerosol's extinction for solar radiation.

关 键 词：气溶胶 臭氧 向下短波辐射 非均相化学反应 苏州 

分 类 号：X515[环境科学与工程—环境工程]