基于MODIS数据的溧阳地区气溶胶光学厚度特性研究  

MODIS data based study on optical depth characteristics of aerosol in Liyang city

作　　者：陈雪薇 谢勇 纪睿 苏逸 李凯云 邵雯 CHEN Xuewei;XIE Yong;JI Rui;SU Yi;LI Kaiyun;SHAO Wen(School of Geography&Science,Nanjing University of Information Science and Technology,Nanjing 210044,China;Nanjing Research Center,National Engineering Laboratory for Remote Sensing Satellite Applications,Nanjing 210044,China)

机构地区：[1]南京信息工程大学地理科学学院,江苏南京210044 [2]遥感卫星应用国家工程实验室南京研究中心,江苏南京210044

出　　处：《现代电子技术》2022年第5期152-156,共5页Modern Electronics Technique

基　　金：国家自然科学基金项目(41671345);广西创新驱动发展专项(科技重大专项)(桂科AA18118038);高分辨率对地观测系统共性指南(50-Y2A07-0508-15/16);国家重点研发计划(2016YFB0502500);南京信息工程大学人才启动基金(2243141601074)和国家民用空间基础设施项目“陆地观测卫星共性应用支撑平台”共同资助。

摘　　要：为了探究溧阳地区的光学厚度特性,本研究采用地基太阳分光光度计的实测数据对MODIS C6 AOD三种产品进行了精度检验,评估气溶胶产品在溧阳地区的适用性。先将地基观测数据进行插值,然后通过确定时间窗口和空间范围完成地基遥感观测数据与卫星气溶胶光学厚度数据间的匹配,研究显示深蓝算法(DB)整体反演精度略优于其他两种算法,其产品在该区域具有很好的适用性。其中,Terra卫星DB算法的线性相关性最好,相关系数可以达到0.87。因此,进一步选用2010—2019年的Terra DB AOD产品分析溧阳地区的近十年气溶胶光学厚度变化情况,发现溧阳气溶胶光学厚度的时间变化具有较为明显的季节性,夏季AOD值最高,而冬季AOD值最低,同时近十年溧阳地区的AOD值总体趋势变小。In order to explore the optical depth characteristics of aerosols in Liyang city,the accuracy of the products of MODIS(moderate-resolution imaging spectroradiometer),C6 and AOD(aerosol optical depth)are checked by the measured data of ground-based sun-photometer(CE318)to evaluate the applicability of aerosol products in Liyang city.The ground-based observation data are subjected to interpolating first,and then the ground-based remote sensing observation data and the satellite AOD data are matched on the basis of determining the time window and spatial range.The research shows that the overall inversion accuracy of the deep blue(DB)algorithm is slightly better than that of the other two algorithms,and its products have good applicability in this region.Among the algorithms,the DB algorithm based on the Terra satellite has the best linear correlation,and its correlation coefficient can reach 0.87.Therefore,the Terra DB AOD product made in 2010—2019 is adopted to analyze the optical depth change of aerosol in Liyang in recent decade.It is found that the temporal change of the optical depth of aerosols in Liyang shows obvious seasonality(the highest AOD value in summer and the lowest AOD value in winter),and the general trend of AOD value in Liyang has become smaller in the past ten years.

关 键 词：气溶胶光学厚度 MODIS 地基遥感观测 产品精度检验 数据匹配 适用性评估 

分 类 号：TN29-34[电子电信—物理电子学] X87[环境科学与工程—环境工程]