大气臭氧总量卫星反演产品地基验证的空间异质性特征  

Spatial Heterogeneity of Ground-based Verification to Total Ozone Column from Satellite Retrieval Products

作　　者：吕春光 王玉萍 张悦[1,2] 耿君 史云飞 LV Chunguang;WANG Yuping;ZHANG Yue;GENG Jun;SHI Yunfei(College of Resources and Environment,Linyi University,Linyi,Shandong 276000,China;Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection,Linyi,Shandong 276000,China;College of Civil Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]临沂大学资源环境学院,山东临沂276000 [2]山东省水土保持与环境保育重点实验室,山东临沂276000 [3]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《遥感信息》2021年第5期8-17,共10页Remote Sensing Information

基　　金：国家自然科学基金项目(41601555);安徽省自然科学基金项目(1808085QD105);山东省自然科学基金项目(ZR2016DB06、ZR2017BD018)。

摘　　要：在卫星遥感大气臭氧总量的地基验证过程中,针对空间异质性特征问题研究的不足,文章以SBUV/2传感器的大气臭氧总量产品为例,选取多个典型地基站点为研究区,通过相关性、风速风向和空间热点的分析,以揭示卫星-地基臭氧总量观测相关性的空间变化以及观测偏差的空间变异分布格局。结果表明,风速风向对观测偏差大于4.45%的高值区具有重要影响,可通过小于6.5分钟的时间差指标去除其效应。地基站点类型对观测值的相关性及偏差,在空间距离和方位上表现出明显的关联和指向。其中,乡村型站点区域观测偏差具有较高的空间梯度变化格局,而都市型站点区域的高值斑块破碎程度较高。本研究可在大气臭氧总量卫星反演产品真实性检验方面提供理论参考和技术支持。For accurate understanding of the spatial variation of total ozone observation by satellite sensor,in this study,several ground-based stations are selected as the research area for comparison of the total ozone column from the SBUV/2 sensor.By means of correlation analysis,wind speed and direction,and hot-spot analysis,the study reveals the linear correlation between satellite-and ground-based total ozone measurements as well as the spatial distribution pattern and spatial variability of the observation deviations.The results show that,the wind speed and direction play key roles in the high value region of observation deviations(>4.45%),the effect of which can be removed by setting a 6.5 minute observation time interval.The stations types categorized by the latitude zone of ground station,atmospheric and underlying surface conditions are associated with the correlation and relative deviation between satellite-and ground-based total ozone measurements.The observation deviation patterns of rural type stations have a high spatial gradient variation pattern.Meanwhile,the high-value patches of urban stations reflect a high degree of fragmentation.Whereas,the spatial variation pattern of suburban stations displays a transition state between fine gradient and predominant patchy status.The results can provide a useful theoretical reference for improving the availability of total ozone remote sensing products in the relevant environmental and ecological researches.

关 键 词：空间异质性 热点分析 SBUV/2 地基站点 臭氧总量 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]