铁岭地区气溶胶光学特性及其影响因素分析  

Analysis of Aerosol Optical Characteristics and Influencing Factors in Tieling Region

作　　者：董丽 张慧[1,2] 缪旭波 宫继萍[2] 

机构地区：[1]南京信息工程大学大气环境与装备技术协同创新中心,地理与遥感学院,江苏南京210044 [2]环境保护部南京环境科学研究所,江苏南京210042

出　　处：《环境科学与技术》2017年第11期81-88,共8页Environmental Science & Technology

摘　　要：气溶胶光学特性是研究区域大气污染特征的重要依据,也是研究气溶胶环境和气候效应的关键。利用2016年4-10月辽宁省铁岭地区的POM-02型太阳光度计观测资料和地面气象资料,分析了铁岭市大气气溶胶光学厚度(AOD)、Angstrom波长指数(α)和浑浊度指数(β)的变化特征,并基于广义相加模型(GAM)分析区域AOD与PM浓度以及气象因子间的相关关系。结果表明,4、5和7月的AOD与β相对较大,α较小;6、8-10月的AOD与β相对较小,α较大。GAM模型分析表明PM浓度、温度、风速、气压以及相对湿度对区域AOD影响显著,并与AOD间存在复杂的非线性关系。经广义交叉验证(GCV)得到GAM模型的调整R^2为0.740,表明该模型能够解释AOD 74.4%的变化。Aerosol optical characteristics, the important basis for studying regional air pollution, are the key to studying aerosol environment and climate effects. In this paper, atmospheric aerosol optical thickness（AOD）, Angstrom wavelength ex-ponent（α） and turbidity index（β） in Tieling region of Liaoning Province were analyzed by use of the POM-02 sun photome-ter observation data and ground meteorological data of Tieling region from April to October 2016, and the correlation between regional concentration of AOD/PM and meteorological factors was analyzed as well based on generalized additive model（GAM）. These analyses suggested that AOD and β were relatively large, while α was smaller in April, May and July; AOD and beta were relatively small, but α was large in June, August and October. The analysis by GAM model showed that factors such as PM concentration, temperature, wind speed, air pressure and relative humidity significantly affected regional AOD;meanwhile complex nonlinear relationship existed between the factors and AOD. Additionally, after the generalized cross vali-dation（GCV） verification, the adjustment R^2 of GAM model was 0.744, which indicated that the model could explain 74.4%changes of AOD.

关 键 词：气溶胶光学厚度 波长指数 广义相加模型(GAM) 气象因子 

分 类 号：X831[环境科学与工程—环境工程]