中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2014年
6期
1866-1873
,共8页
雷少刚%卞正富%John L. DANIELS%刘东烈
雷少剛%卞正富%John L. DANIELS%劉東烈
뢰소강%변정부%John L. DANIELS%류동렬
土壤水含量%土壤温差%热惯量%遥感%空间分辨率
土壤水含量%土壤溫差%熱慣量%遙感%空間分辨率
토양수함량%토양온차%열관량%요감%공간분변솔
soil water content%soil temperature difference%thermal inertia%remote sensing%spatial resolution
基于热传导理论建立土壤日温差模型，可实现基于TM影像提取特定深度的土壤日温差信息。利用该模型获取的土壤日温差与ATI的分辨率可达到120 m (TM)或60 m (ETM+)。荒漠矿区实验表明，实测土壤水分与MODIS得到的ATI的相关系数仅为0.264，而与改进模型得的高分辨率ATI 相关系数为0.789，监测的土壤水分均方根误差为1.90%(m3/m3)。提出的方法同样还适用于其他具有热红外波段的高分辨率影像结合ATI的土壤水分提取。
基于熱傳導理論建立土壤日溫差模型，可實現基于TM影像提取特定深度的土壤日溫差信息。利用該模型穫取的土壤日溫差與ATI的分辨率可達到120 m (TM)或60 m (ETM+)。荒漠礦區實驗錶明，實測土壤水分與MODIS得到的ATI的相關繫數僅為0.264，而與改進模型得的高分辨率ATI 相關繫數為0.789，鑑測的土壤水分均方根誤差為1.90%(m3/m3)。提齣的方法同樣還適用于其他具有熱紅外波段的高分辨率影像結閤ATI的土壤水分提取。
기우열전도이론건립토양일온차모형，가실현기우TM영상제취특정심도적토양일온차신식。이용해모형획취적토양일온차여ATI적분변솔가체도120 m (TM)혹60 m (ETM+)。황막광구실험표명，실측토양수분여MODIS득도적ATI적상관계수부위0.264，이여개진모형득적고분변솔ATI 상관계수위0.789，감측적토양수분균방근오차위1.90%(m3/m3)。제출적방법동양환괄용우기타구유열홍외파단적고분변솔영상결합ATI적토양수분제취。
A surface soil moisture model with improved spatial resolution was developed using remotely sensed apparent thermal inertia (ATI). The model integrates the surface temperature derived from TM/ETM+image and the mean surface temperature from MODIS images to improve the spatial resolution of soil temperature difference based on the heat conduction equation, which is necessary to calculate the ATI. Consequently, the spatial resolution of ATI and SMC can be enhanced from 1 km to 120 m (TM) or 60 m (ETM+). Moreover, the enhanced ATI has a much stronger correlation coefficient (R2) with SMC (0.789) than the surface reflectance (0.108) or the ATI derived only from MODIS images (0.264). Based on the regression statistics of the field SMC measurement and enhanced ATI, a linear regression model with an RMS error of 1.90%was found.
