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当前位置: 首页 > 文章 > MODIS/FAPAR在呼伦贝尔草原区的精度验证与分析 农业工程学报 2010,26 (12) 217-224+8
Position: Home > Articles > Validation of MODIS FAPAR in the Hulunber grassland of China Transactions of the Chinese Society of Agricultural Engineering 2010,26 (12) 217-224+8

MODIS/FAPAR在呼伦贝尔草原区的精度验证与分析

作  者：
李刚;张华;范闻捷;张宏斌;辛晓平
单  位：
呼伦贝尔草原生态系统国家野外科学观测研究站;中国农科院资源区划所;中国农业科学院农业资源与农业区划研究所;农业部资源遥感与数字农业重点开放实验室呼伦贝尔草原生态系统国家野外科学观测研究站中国农业科学院农业资源与农业区划研究所北京大学遥感与地理信息系统研究所
关键词：
遥感;草地;MODIS;FAPAR;NDVI;验证;呼伦贝尔
摘  要：
验证MODIS/FAPAR产品在温性草原地区的精度,以提高NPP估算精度,为区域碳平衡监测及合理安排草地畜牧业生产提供服务。该文选取两块2km×2km温性草甸类草地设计和进行FAPAR实测试验。以分辨率为32m的北京-1号卫星遥感数据对样地进行异质性分析,然后进行尺度上推,利用地面实测数据对1km的MODIS/FAPAR草原地区产品进行验证。结果表明,在草地生长季,MODIS/FAPAR产品的草地FAPAR季节变化与实测FAPAR季节变化趋势基本一致,但总体要比实测FAPAR要高,针茅样地MODIS/FAPAR值比实测值要高约13.7%,羊草样地为18.7%。MODIS/FAPAR算法对于局部区域过于粗糙,对草地类型多样的中国来说,需更多的野外试验资料,以反演适合不同草地类型的FAPAR算法。
译  名：
Validation of MODIS FAPAR in the Hulunber grassland of China
作  者：
Li Gang1,2,3,Zhang Hua3,Fan Wenjie4,Zhang Hongbin1,2,3,Xin Xiaoping1,2,3 (1. Hulunber State Station of Grassland Ecosystem Field Observation and Scientific Research,Beijing 100081,China; 2. Key Lab of Resource Remote Sensing and Digital Agriculture,Ministry of Agriculture,Beijing 100081,China; 3. Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China; 4. Institute of Remote Sensing and GIS,Peking University,Beijing 100871,China)
关键词：
remote sensing,grassland,MODIS,FAPAR,NDVI,validation,Hulunber
摘  要：
The accuracy validation of the MODIS/FAPAR product is a prerequisite for using it to estimate local net primary production (NPP),and to supply service for monitoring the balance of region carbon and arranging production of grassland animal husbandry rationally. For this purpose,we designed and carried out in-situ measurements of FAPAR in two 2 km×2 km areas within the temperate meadow-steppe grassland in Hulunber during growing season in 2008,and analyzed heterogeneity of the two sites using image of Beijing-1 satellite with resolution of 32 m,and then scaled up and validated MODIS/FAPAR products with in-situ measured data in grassland area. The results showed that the MODIS FAPAR product reflected very well the seasonal dynamics of in-situ FAPAR,but tended to overestimate the value with averaged relative error of 13.7% in the Stipa Baicalensis site and 18.7% in the Leymus Chinensis site. The MODIS/FAPAR algorithm was derived based on the global land cover map,which may be too broad for local areas. More fieldworks for various types of the grasslands are necessary.

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