西北太平洋海水透明度遥感反演与融合方法  

Secchi Disk Depth Retrieval and Merging in the Northwest Pacific from Multiple Missions of Ocean Color Remote Sensing

作　　者：王晓菲[1] 张亭禄[1] 田林[1] 施英妮[1] WANG Xiao-Fei ZHANG Ting-Lu TIAN Lin SHI Ying-Ni(College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China)

机构地区：[1]中国海洋大学信息科学与工程学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2016年第12期133-141,共9页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(41276041)资助~~

摘　　要：海水透明度是描述海水光学特性的一个重要参数。论文首先利用现场测量的遥感反射率和透明度数据建立了西北太平洋的透明度遥感反演模型,并应用于Seawifs、MODIS-aqua、MOIDS-terra及MERIS Level 2反射率数据,获取西北太平洋的透明度数据。然后将平均法、最优插值法2种融合方法分别应用于上述4颗卫星的透明度数据进行数据融合,并用现场测量的同步透明度数据对融合后的产品进行了印证。另外,利用2种融合方法分别对西北太平洋2007年Seawifs、MODIS-aqua、MODIS-terra和MERIS4颗传感器的透明度数据进行了月融合,分析了融合的西北太平洋的时空分布特征。研究结果表明,融合数据大幅度提高了空间覆盖率,并具有较高可信度。平均法和最优插值法两种融合方法性能有较大的不同,平均法对细节特征保留的较好,且具有较高的运行速度,但有时空间覆盖率仍不能满足要求;最优插值法具有高的空间覆盖率,但其运行速度较慢。Secchi Disk Depth（SDD）is an important indicator which describes water visibility and optical property.Firstly,the inversion algorithm for estimating SDD in the Northwest Pacific Ocean was established using in situ data.Then,the inversion algorithm was applied to the satellites data from four satellite sensors（SeaWiFS,MODIS-Terra,MODIS-Aqua,and MERIS）to obtain the SDD data in the Northwest Pacific Ocean.Secondly,the two kinds of merging algorithm（Averaging algorithm and Optimal interpolation algorithm）were used to generate the merging data from the four satellite sensors,respectively.Meanwhile,the merged results were validated with the matchup in situ data.Finally,the monthly merged data were obtained using the two merging algorithms from the four satellite data in2007,respectively.The temporal and spatial variations of the SDD in the Northwest Pacific Ocean were analyzed.The results showed the coverage of the merged data products has been significantly improved,and the quality of the merged data products is reliability.In addition,the averaging algorithm has a higher accuracy and running speed,but the coverage of data is not enough sometimes.Optimal Interpolation has the highest spatial coverage,but its running speed is slower.

关 键 词：海水透明度 遥感反演方法 西北太平洋 数据融合 

分 类 号：P722[天文地球—海洋科学] P715