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基于FY-2C数据的地表温度反演验证——以黄河源区玛曲为例

DOI: 10.6046/gtzyyg.2015.04.11, PP. 68-72

Keywords: 地表温度,FY-2C,劈窗算法,MODIS

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Abstract:

地表温度是气候、水文和生态等研究领域的基本参数,在地表水量和能量平衡的研究和应用中发挥着十分重要的作用。强烈的异质性是地表温度反演精度不高的主要原因之一。该文以黄河源区玛曲为研究区,评估FY-2C数据的地表温度反演精度,为将来温度反演算法和产品的进一步发展提供依据。首先,以与FY-2C相同空间分辨率的MODIS地表温度产品(MOD11B1)为地表温度真值,对反演的地表温度进行了验证;然后,利用研究区内20个采样点的土壤温度(5cm)实测数据对反演结果进行验证。结果表明,FY-2C地表温度与MODIS温度产品具有较好的相关性,相关系数在0.72~0.95之间,均方根误差在0.44~3.87K之间,平均均方根误差为1.90K;反演结果和实测数据的相关系数为0.69。

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