热红外与L波段土壤温度的数值模拟及差异分析  

The Numerical Simulation and Difference Analysis of Soil Temperature on Thermal Infrared and L Bands

作　　者：马红章[1,2] 柳钦火[2] 闻建光[2] 施建[2] 

机构地区：[1]中国石油大学(华东)物理科学与技术学院,山东266555 [2]中国科学院遥感应用研究所遥感科学国家重点实验室,北京100101

出　　处：《国土资源遥感》2011年第2期26-32,共7页Remote Sensing for Land & Resources

基　　金：国家自然科学基金重点项目"光学与微波遥感的模型协同与联合反演研究"(编号:40730525);国家重点基础研究计划项目(973计划)"陆表生态环境要素主被动遥感协同反演理论与方法"(编号:2007CB714401)

摘　　要：L波段微波对土壤具有较强的穿透性,所获得的土壤辐射亮温包含了穿透深度内各层土壤的温度信息,因此其所获得的土壤等效温度与红外地表温度具有不同的物理意义,且在数值上也有较大的差异。在应用长时间序列的土壤温度廓线实测数据对水热耦合模型(Simultaneous Heat And Water,SHAW)进行验证的基础上,利用怀来试验区2006～2009年的气象观测数据驱动SHAW模型,模拟了4a的土壤温湿度廓线小时数据,并计算了对应时刻L波段的土壤等效温度,并在不同时段上对L波段土壤等效温度与热红外地表温度之间的差异进行了初步分析,为进一步探讨微波等效温度与热红外地表温度之间的定量关系模型奠定了基础,为用热红外与被动微波数据协同反演土壤温度提供了理论支持。L band microwave can penetrate the soil, and its bright temperature data contain layers of soil temperature information within the penetration depth. L band effective soil temperature and infrared soil temperature have different physical significances and values. The SHAW model was verified by using the observed data of the automatic weather station in Huailai and was driven to simulate the soil temperature and humidity profile data by using 2006 ~ 2009 meteorological observation data from Huailai experimental area. The L band effective soil temperature was computed using the soil temperature and humidity profile data in an hour interval. An analysis of the difference between infrared soil temperature and L band effective soil temperature was made tentatively. The result constitutes a basis for further exploration of the relationship between infrared soil temperature and L band effective soil temperature and also provides a theoretical support for concerted inversion of soil temperature combining infrared and passive microwave data.

关 键 词：热红外遥感技术 微波遥感 土壤等效温度 协同反演 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置] P237[自动化与计算机技术—控制科学与工程]