长三角卫星气溶胶光学厚度的空间插值研究  

Study on Spatial Interpolation of Aerosol Optical Depth in Yangtze River Delta Based on Remote Sensing Data

作　　者：王细元[1,2] 吉婷婷 谢俊毅[1] WANG Xi-yuan;JI Ting-ting;XIE Jun-yi(School of Urban and Environmental Sciences,Huaiyin Normal University,Huaian,Jiangsu 223300,China;Jiangsu Provincial Engineering Research Center for Intelligent Monitoring and Ecological Management of Pond and Reservoir Water Environment,Huaian,Jiangsu 223300,China)

机构地区：[1]淮阴师范学院城市与环境学院,江苏淮安223300 [2]江苏省塘库智能监测与水环境生态治理工程研究中心,江苏淮安223300

出　　处：《环境监测管理与技术》2023年第1期20-25,共6页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学青年基金资助项目(41801075);淮安市自然科学研究计划(指导性)基金资助项目(HABZ202024);江苏省高校哲学社会科学基金资助项目(2021SJA1781)。

摘　　要：以长三角为研究区域,从数据采样密度、实测数据和空间分布等方面探讨空间插值方法插补气溶胶光学厚度(AOD)的适用性。研究结果表明,随着采样密度降低,AOD空间插值结果与原始影像的拟合优度R 2呈幂函数递增,拐点在5%附近,自然邻域插值法表现最好;插值后卫星AOD有效数据天数比例提高到约70%,相关系数R>0.8,年均值由0.48升高到0.66,从西北往东南逐渐减低。标准差由0.27升高到0.38,从北往南逐渐降低;有效数据天数比例随降水量由南到北递减呈现相反递增趋势,水面和山地有效数据天数比例低。数据采样密度为5%时,插值结果与原始影像的空间自相关、标准差和均值的相关系数分别为0.74、0.73和0.69。Taking the Yangtze River Delta as the research area,the applicability of spatial interpolation method for aerosol optical depth interpolate was discussed from sampling density,measured data and spatial distribution.The results showed that with the decrease of sampling density,the goodness of fit R 2 between AOD spatial interpolation results and original image increased as power function,the inflection point was around 5%.Natural neighborhood interpolation was the best method.After interpolation,the proportion of days with valid AOD data from satellite increased to about 70%,the correlation coefficient R>0.8,and the annual mean value increased from 0.48 to 0.66,showing a gradual decreasing trend from northwest to southeast.The standard deviation increased from 0.27 to 0.38,showing a gradual decreasing trend from north to south.The proportion of days with valid data showed an increasing trend with the precipitation decreasing from south to north.The proportion of days with valid data on water surface and mountain area was low.When the sampling density was 5%,the correlation coefficients between interpolation results and the spatial autocorrelation of original image,standard deviation and mean value were 0.74,0.73 and 0.69,respectively.

关 键 词：气溶胶光学厚度 空间插值 采样密度 自然邻域插值法 长三角 

分 类 号：X513[环境科学与工程—环境工程] X87