HJ-1CCD与Landsat-8OLI在呼伦贝尔草原区FPAR反演中的比较分析  

Comparative analysis in retrieved FPAR from HJ-1CCD and Landsat-8OLI Data in Hulunber grassland

作　　者：李晓宇[1,2,3,4] 包玉海[2] 吴琼[1,2,3,4] 海全胜[3,4,5] 李振旺[3,4] 张保辉[3,4] 闫瑞瑞[3,4] 辛晓平[3,4] 

机构地区：[1]内蒙古师范大学地理科学学院,内蒙古呼和浩特010022 [2]内蒙古师范大学内蒙古自治区遥感与地理信息系统重点实验室,内蒙古呼和浩特010022 [3]呼伦贝尔草原生态系统国家野外科学观测研究站,北京100081 [4]中国农业科学院农业资源与农业区划研究所,北京100081 [5]内蒙古科技大学包头师范学院,内蒙古包头014030

出　　处：《草业科学》2015年第2期151-159,共9页Pratacultural Science

基　　金：国家高技术研究发展计划(863计划)(2012AA102003-4);国家高技术研究发展计划(863计划)(2012AA12A305-5-3);国家高技术研究发展计划(863计划)(2012AA120905);国家科技支撑计划项目(2012BAC19B04);国家科技支撑计划项目(2013BAC03B02);国家现代农业产业技术体系建设专项(cars-35)

摘　　要：光合有效辐射吸收比率(Fraction of Absorbed Photosynthetically Active Radiation,FPAR)是主要的植物生理参数之一。本研究根据地面实测数据和由HJ-1CCD(Charge-coupled Device,CCD)及Landsat-8OLI(Operational Land Imager,OLI)影像提取的NDVI,分别建立研究区FPAR估算模型,对比分析和评价了CCD和OLI数据在反演研究区FPAR的精度。结果表明,基于CCD和OLI数据计算的NDVI与实测FPAR之间均呈现良好的正相关关系;针对每个基本采样单元(Elementary Sampling Units,ESU),两种数据反演的FPAR具有显著的一致性,且反演值相差甚少;剔除影像中受到云和云影影响的区域,整个研究区利用CCD与OLI数据反演的FPAR相关性好、分布趋势一致,且反演值均值差很小。本研究结果对该区域FPAR的进一步研究具有借鉴和指导意义,在以后的研究中可以尝试使用HJ-1CCD数据。FPAR(Fraction of Absorbed Photosynthetically Active Radiation)is one of the main plant physiological parameters.FPAR estimation models were established based on both ground measured data and NDVI extracted from HJ-1CCD(Charge-coupled Device,CCD)and Landsat-8OLI(Operational Land Imager,OLI)image,respectively.And then,the differences in retrieved FPAR from CCD and OLI data were comparatively analyzed and quantitatively assessed.There was a outstanding positive correlation between measured FPAR and NDVI from CCD and OLI data.For each ESU(Elementary Sampling Units),FPAR retrieved from CCD and OLI data were significantly consistent with each other only with small difference.FPAR retrieved from CCD data was consistent with that retrieved from OLI data with similar distribution trends and small difference if excluded the area being affected by clouds and cloud shadow in the entire study area.The results provided reference and guidance for further FPAR research in the studied area.

关 键 词：FPAR CCD OLI NDVI 统计模型 

分 类 号：S812[农业科学—草业科学]