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遥感技术与应用  2006, Vol. 21 Issue (6): 483-487    DOI: 10.11873/j.issn.1004-0323.2006.6.483
研究与应用     
针对MODIS 数据的地表温度非线性迭代反演方法
姜立鹏1, 3, 覃志豪1, 2, 谢 雯3
( 1. 南京大学国际地球系统科学研究所, 江苏南京 210093; 2. 中国农业科学院农业资源与农业区划研究所, 北京 100081; 3. 南京大学城市与资源学系, 江苏南京 210093)
A Nonlinear Iterative Method for Retrieving Land Surface Temperature by Using MODIS Data
JIANG Li-peng 1, 3, QIN Zhi-hao1, 2, XIE Wen3
( 1. International Institute for Earth System Science of Nanjing University , Nanjing 210093, China;2. Institute of Natural Resources and Regional Planning , Chinese Academy of Agricultural Sciences,Beijing 100081, China; 3. Urban and Resource Department of Nanjing University,Nanjing 210093, China)
 全文: PDF 
摘要:

 地表温度是气象、水文、生态等研究领域中的一个重要参数。构建了MODIS31/ 32 波段的热辐射传输方程, 讨论了方程的数值迭代解法, 提出了针对MODIS 数据地表温度的非线性迭代反演方法, 并介绍了大气透过率和地表比辐射率这两个中间参数的估计方法。误差及敏感性分析表明,提出的方法对大气透过率和地表比辐射率都不敏感, 反演精度优于传统的线性分裂窗算法。

关键词:  MODIS 地表温度 迭代 非线性    
Abstract:

Land surface temperature ( LST ) is an important parameter in meteorology , hydrology , ecology and so on. This paper has proposed a nonlinear iterative method for retrieving land surface temperature ( LST ) from MODIS data which needs two parameters ( land surface emissivity and atmospheret ransmittance). At first , two radiance transfer equations for MODIS band 31 and 32 had been built , which involves two unknowns ( landsurface temperature and average atmosphere temperature) . Because of complexity , a numerical algorithm has been developed to solve the equations using iterative approach. Then, the estimation of the two essential parameters of the nonlinear iterative method has been extensively discussed. The atmospheric transmittance can be estimated on the basis of the relationship between atmospheric transmittance and water content which can be retrieved from the visible and infrared bans of MODIS data. As MODIS image has the lower resolution, the pixels of MODIS for most natural surfaces can be viewed as composed of three land cover patterns: vegetatio , bare soil and water. The composition ration of vegetation and bare soil can be estimated from NDVI, and the land surface emissivity of MODIS31 and MODIS32 can be estimated by using the land surface thermal radiation equations of composed pixel and the known emissivity of land cover patterns. Finally , the sensitivity of parameters is analyzed and the results indicate that the parameters are not sensitive to the LST retrieval method we have proposed. The retrieved LST in Jiangsu province indicated the space difference, urban heat island effect and different ground object types.

Key words: MODIS    Land surface temperature    Iter ative    Nonlinear
收稿日期: 2006-01-16 出版日期: 2011-09-27
:  TP 79  
基金资助:

国家自然科学基金“用MODIS 数据反演地表温度的算法及其参数”项目( 40471096) ; 国家自然科学基金“我国农业旱灾机理与监测方法研究”项目( 30571078) 。

作者简介: 姜立鹏( 1982- ) , 男, 硕士生, 主要从事热红外遥感理论与应用、数字图像处理、地理信息系统应用研究。
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引用本文:

姜立鹏, 覃志豪, 谢 雯. 针对MODIS 数据的地表温度非线性迭代反演方法[J]. 遥感技术与应用, 2006, 21(6): 483-487.

JIANG Li-peng , QIN Zhi-hao, XIE Wen. A Nonlinear Iterative Method for Retrieving Land Surface Temperature by Using MODIS Data. Remote Sensing Technology and Application, 2006, 21(6): 483-487.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2006.6.483        http://www.rsta.ac.cn/CN/Y2006/V21/I6/483

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