基于地基遥感的杭州地区气溶胶光学特性  

Column-integrated Aerosol Optical Properties Determined Using Ground-based Sun Photometry Measurements in the Hangzhou Region

作　　者：齐冰[1,2] 车慧正 徐婷婷[4] 杜荣光 胡德云[1] 梁卓然[1] 马千里[5] 姚杰 QI Bing;QI Bing;XU Ting-ting;DU Rong-guang;HU De-yun;LIANG Zhuo-ran;MA Qian-li;YAO Jie(Hangzhou Meteorological Bureau, Hangzhou 310051,China;Key Laboratory of Atmospheric Chemistry, China Meteorological Administration,Beijing 100081,China;Chinese Academy of Meteorological Sciences, Beijing 100081,China;Shanghai Baosteel Industry Technological Service Co.,Ltd.,Shanghai 201900,China;Lin'an Regional Background Station, Lin'an 311307,China)

机构地区：[1]杭州市气象局,杭州310051 [2]中国气象局大气化学重点开放实验室,北京100081 [3]中国气象科学研究院,北京100081 [4]上海宝钢工业技术服务有限公司,上海201900 [5]临安区域大气本底站,临安311307

出　　处：《环境科学》2019年第4期1604-1612,共9页Environmental Science

基　　金：中国气象局大气化学重点开放实验室开放课题项目(2017B03);国家重点研发计划项目(2016YFA0601900);国家自然科学基金重大项目(41590874);浙江省自然科学基金项目(LY16D010006);浙江省气象局科技计划项目(2018YB02)

摘　　要：利用2012年杭州、桐庐、建德、淳安CE-318太阳光度计的观测资料,反演获得了气溶胶光学厚度(AOD)、?ngstr?m波长指数(AE)、单次散射反照率(SSA)和气溶胶粒子谱(ASD)等参数,分析了杭州地区气溶胶光学特性的变化规律.结果表明,2012年杭州、桐庐、建德、淳安AOD_(440nm)年均值分别为0. 94±0. 16、0. 84±0. 17、0. 82±0. 22、0. 71±0. 20,呈现出自东北向西南逐渐下降的变化趋势,是长三角地区AOD高值地区之一. AE_(440-870nm)年均值分别为1. 24±0. 12、1. 19±0. 17、1. 06±0. 04、1. 04±0. 10,表明杭州地区以半径较小的气溶胶粒子为主控模态. 3～4月AE相对偏低与来自北方的沙尘粒子远距离输送有关.除淳安外,杭州、桐庐和建德AOD有明显的日变化特征.不同地区细模态粒子峰值半径春季、秋季和冬季均在0. 15μm左右,由于气溶胶粒子的吸湿增加导致夏季细模态粒子的峰值半径在0. 25μm左右;粗模态粒子峰值半径夏季、秋季和冬季均在2. 94μm左右,高于春季(1. 7～2. 2μm). SSA_(440nm)年均值分别为0. 91±0. 01、0. 92±0. 03、0. 92±0. 02、0. 93±0. 02,说明杭州地区气溶胶粒子为中等强度吸收性气溶胶.对气溶胶类型进行分类表明,杭州以生物质燃烧/城市工业型为主,而桐庐、建德和淳安以混合型为主.To investigate the optical properties of aerosols in the I langzhou region ( Hangzhou, Tonglu, J iande, and Chun'an), the aerosol optical depth ( AOD), Angstrom exponent ( AE), single scattering albedo ( SSA), and aerosol size distribution ( ASD ) were measured using C1MEL sun-photometers in 2012. The results showed that the annual average values of A()D440nm in Hangzhou, Tonglu, Jiande, and Chun'an were 0. 94 ± 0. 16 , 0. 84 ±0. 17 , 0. 82 ± 0. 22 , and 0. 71 ± 0. 20, respectively. The values generally decreased from the northeast to the southwest, and represented one of highest AOD districts in the Yangtze River Delta, China. The annual average values of AE440 870nra were 1.24 ± 0. 12 , 1. 19 ± 0. 17 , 1.06 ± 0. 04 , and 1.04 ± 0. 10, respectively, indicating that particles with small average effective radii were predominant. The relatively lower AE values in March and April were generally attributed to the long-range transport of dust aerosols from Northwest China. Obvious diurnal variations in the AOD were found in Hangzhou, Tonglu, and Jiande, but not in Chun'an. An average fine-mode effective radius of ~ 0. 15 |im was observed in spring, autumn, and winter, while a value of - 0. 25 pini was observed in summer, in conjunction with aerosol hygroscopic growth. An average coarse-mode effective radius of - 2. 94 jxm was observed in summer, autumn, and winter, which was higher than the value in spring. The annual average values of SSA440nm were 0. 91 ±0.01 , 0. 92 ± 0. 03 , 0. 92 ± 0. 02 , 0. 93 ± 0. 02 , respectively, indicating that the particles had relatively strong to moderate absorption. Characterization of the aerosol types showed the predominance of biomass burning and urban industrial type aerosols in Hangzhou, while mixed type aerosols were observed in Tonglu, Jiande, and Chun'an.

关 键 词：气溶胶光学厚度 Angstr9m波长指数 单次散射反照率 气溶胶粒子谱 杭州地区 

分 类 号：X513[环境科学与工程—环境工程] X87