摘要
以甘肃省张掖绿洲为研究区域,基于双角度、多光谱AATSR数据,利用土壤—植被线性混合辐射传输模型反演了张掖绿洲整个生长季的植被和土壤组分温度,并对AATSR不同观测角度间配准前后反演的组分温度结果进行了比较。结果表明:在利用双角度数据进行组分温度反演时,不同观测角度间的配准对反演结果的影响不容忽视。进一步利用机载WIDAS观测数据反演的盈科附近植被与土壤组分温度及盈科站实测的地表辐射温度对AATSR数据反演得到的组分温度进行了验证,结果表明基于AATSR双角度数据和土壤—植被线性混合模型的结合反演得到的组分温度具有合理的时间和空间变化趋势,也能够较好地反映张掖绿洲植被生长以及组分温度的变化趋势。
A simple linear mixing model of heterogeneous soil-vegetation system was applied to bi-angular observations made by AATSR to retrieve soil and foliage component temperatures over heterogeneous land surface during the period of growing season records of component temperatures,from May 30th to August 24th in 2008in Zhangye Oasis.Comparison the retrieved component temperatures from the AATSR data with and without proper geo-registration between nadir and forward view images indicates that the registration between the nadir view and the forward view is an important process for obtaining reliable retrieval of soil and vegetation component temperatures.The retrieved component temperatures by AATSR were compared with the results retrieved from airborne measurements made by WIDAS and ground measurements of long-wave radiation for validation,and the validation results indicate that both vegetation and soil temperatures retrieved by AATSR can reflect the spatial and temporal trend of component temperatures correctly.
出处
《遥感技术与应用》
CSCD
北大核心
2014年第2期247-257,共11页
Remote Sensing Technology and Application
基金
国家自然科学基金项目(91025004)
中国科学院
国家外国专家局创新团队国际合作伙伴计划(KZZD-EW-TZ-09)
关键词
组分温度反演
线性混合模型
AATSR
Soil and vegetation component temperatures
Retrieval
Linear mixing canopy radiative transfer model
AATSR
