摘要
该研究在新疆地区选取了3个典型环境下的气溶胶地基遥感观测站点——喀什、精河和乌鲁木齐,利用地基遥感观测的气溶胶光学厚度(AOD)数据,探讨MODIS 1 km和10 km AOD产品在新疆地区的适用性。结果表明:(1)MODIS 1km和10 km AOD产品与地基观测站点的产品相关系数均>0.51,相对平均偏差分别为0.74和0.78,均<1,说明MODIS AOD产品在新疆地区存在一定的低估现象;(2)从不同季节来看,2种产品夏秋两季表现良好,MODIS 1 km AOD产品在夏、秋、冬3季表现优于MODIS 10 km AOD产品,春季则相反;(3)综合来看,MODIS 1 km AOD产品总体精度较高,具有良好的空间差异性,在新疆地区表现更好。对比2种产品多年的时空分布特征,可为后续的AOD研究和利用提供参考。
In this study,three ground-based aerosol remote sensing observation stations,Kashi,Jinghe and Urumqi,were selected in Xinjiang.The applicability of MODIS 1 km and 10 km AOD products in Xinjiang was discussed by using the aerosol optical depth(AOD)data observed by ground-based remote sensing.The results show that:(1)The correlation coefficient of MODIS 1 km and 10 km AOD products with the ground-based observation stations is greater than 0.51,and the relative average deviation is 0.74 and 0.78 respectively,both less than 1,which indicates that MODIS AOD products are underestimated in Xinjiang;(2)From different seasons,the two products perform well in summer and autumn,MODIS 1 km AOD products are better than MODIS 10 km AOD products in summer,autumn and winter,but the opposite is true in spring.(3)Generally speaking,MODIS 1 km AOD products have higher overall accuracy,good spatial differences and better performance in Xinjiang.The comparison of the spatial and temporal distribution characteristics of the two products provides a reference for the subsequent AOD research and utilization.
作者
张燚
丁建丽
马雯
陈香月
玛依拉·热西丁
ZHANG Yi;DING Jianli;MA Wen;CHEN Xiangyue;MAYILA Rexiding(Key Laboratory of Smart City and Environment Modelling of Higher Education Institute,College of Resources&Environmental Science,Xinjiang University,Urumqi 830046,China;Key Laboratory of Oasis Ecology,Xinjiang University,Urumqi 830046,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2021年第S02期21-31,共11页
Environmental Science & Technology
基金
国家自然科学基金项目(41771470,41961059)
自治区重点实验室专项基金项目(2020D04038)
关键词
AOD
地基遥感
太阳光度计
AOD产品验证
AOD
ground based remote sensing
solar photometer
AOD product validation
