| 三温模型与MODIS影像反演蒸散发 |
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| 引用本文： | 熊育久,邱国玉,陈晓宏,赵少华,田菲.三温模型与MODIS影像反演蒸散发[J].遥感学报,2012,16(5):969-985. |
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| 作者姓名： | 熊育久 邱国玉 陈晓宏 赵少华 田菲 |
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| 作者单位： | 中山大学 地理科学与规划学院水资源与环境系,广东 广州 510275;中山大学华南地区水循环与水安全广东省普通高校重点实验室,广东 广州 510275;北京大学 深圳研究生院环境与能源学院,广东 深圳 518055;中山大学 地理科学与规划学院水资源与环境系,广东 广州 510275;中山大学华南地区水循环与水安全广东省普通高校重点实验室,广东 广州 510275;环境保护部 卫星环境应用中心,北京 100094;北京师范大学 资源学院,北京 100875 |
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| 基金项目： | 高等学校博士学科点专项科研基金(编号: 20110171120001);中国博士后科学基金项目(编号: 20090460795);国家自然科学基金项目(编号: 91025008,41101313);国家重点基础研究发展计划(973计划)(编号: 2009CB421303). |
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| 摘 要： | 提出三温模型结合MODIS数据反演区域蒸散发的方法,在内蒙古草原开展案例研究,以2008年植被生长季(7—10月)的波文比系统观测数据为标准,对该方法进行检验。结果表明:三温模型反演的蒸散发量,平均值、最大、最小值分别为4.58mm/d、9.03mm/d、1.28mm/d;蒸散发反演结果在空间上分布较均匀,与草原的均一性相吻合,在时间上蒸散发的数值先逐渐增大,8月后逐渐减小,与观测结果相一致;三温模型反演的蒸散发量与观测值之间的最小、最大绝对误差分别为0.11mm/d、1.64mm/d,平均绝对误差为0.58mm/d、平均相对误差为17.10%。三温模型在1km空间尺度的反演精度较理想。
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| 关 键 词： | 三温模型 蒸散发 MODIS 波文比能量平衡法 |
| 收稿时间： | 2011/9/14 0:00:00 |
| 修稿时间： | 2012/1/19 0:00:00 |
Estimation of evapotranspiration using three-temperature model based on MODIS data |
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| XIONG Yujiu,QIU Guoyu,CHEN Xiaohong,ZHAO Shaohua and TIAN Fei.Estimation of evapotranspiration using three-temperature model based on MODIS data[J].Journal of Remote Sensing,2012,16(5):969-985. |
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| Authors: | XIONG Yujiu QIU Guoyu CHEN Xiaohong ZHAO Shaohua and TIAN Fei |
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| Institution: | Department of Water Resources and Environment, School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China;Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute, Sun Yat-sen University, Guangzhou 510275, China;School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, China;Department of Water Resources and Environment, School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China;Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute, Sun Yat-sen University, Guangzhou 510275, China;Environmental Satellite Center, Ministry of Environmental Protection, Beijing 100094, China;College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China |
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| Abstract: | Estimation of evapotranspiration (ET) is an obstacle in researches of both water and energy balance. In this paper, three-temperature (3T) model was revised for remote sensing application. A case study was performed in a semi-arid grassland from July to October in 2008 in Taibus Banner of Inner Mongolia, China. Eleven cloudless MODIS images at 1 km scale were used to estimate ET and data observed from two Bowen ratio systems in the corresponding period was adopted to validate the performance of the 3T model. Results showed that: (1) the modeled ET varied from 1.28 mm/d to 9.03 mm/d in the growing season, with a mean value of 4.58 mm/d; (2) the modeled daily ET distributed homogeneously in space, and temporally, ET value increased and then decreased gradually as the growing season changed from beginning to the end; (3) the mean absolute error between the observed and modeled ET was 0.58 mm/d, with maximum and minimum absolute errors of 1.64 mm/d and 0.11 mm/d, respectively, and the mean absolute percent error was 17.10%. All the performances indicated that the 3T model has a good potential in ET estimation. |
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| Keywords: | 3T model evapotranspiration MODIS Bowen ratio energy balance method |
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