摘要
遥感反演的地表温度是研究全球气候变化和区域水分与能量交换的关键参数,准确获取地表温度对诊断地球环境变化意义重大。然而在异质性下垫面,像元尺度地表温度相对真值获取困难,导致遥感反演的地表温度的不确定性难以准确评估,影响了遥感反演的地表温度的深入应用。梳理了基于地面观测数据的异质性下垫面像元尺度地表温度模拟研究进展,依据模型是否构建真实空间分布,归纳了修正几何投影模型、真实结构三维模型和其他模型等,并对比了几种模型的优缺点。最后,指出了异质性下垫面像元尺度地表温度模拟中尚待解决的问题,并探讨了以后的研究方向。
Remotely sensed Land Surface Temperature （LST） is a key parameter for studying the global cli- mate changes and the exchanges of water and energy. Acquiring LST accurately is important to diagnose the change of environment on earth. Quantifying the uncertainty of remotely sensed LST is the first step of its application. How- ever, due to the difficulties in obtaining the ground truth of LST at the pixel scale, it is difficult to validate the re- motely sensed LST. Here, methods for simulating the LST at the pixel scale based on ground measurements over heterogeneous area were reviewed. From the way to construct the ground scene, these methods were classified into three types, including the Modified Geometric Projection model （ MGP ）, realistic structural three-dimensional model, and other model. The advantages and disadvantages of these models were examined and compared. Finally, some issues in simulating LST at the pixel scale over heterogeneous area needed to be solved and on-going directions in the future were summarized.
出处
《地球科学进展》
CAS
CSCD
北大核心
2016年第5期471-480,共10页
Advances in Earth Science
基金
国家自然科学基金面上项目"基于三维建模与组分发射辐射分离的异质性场景像元尺度表面温度模拟研究"(编号:41371341)
国家重点基础研究发展计划项目"复杂地表遥感信息动态分析与建模"(编号:2013CB733406)资助~~
关键词
地表温度
像元尺度
异质性
遥感
Land Surface Temperature
Pixel scale
Heterogeneous surface
Remote sensing.
