摘要
对黑河中游非均匀地表区域地表能量通量和蒸发(或蒸散)的研究是一个十分重要但又是一个难点问题。文中提出了2个基于卫星遥感和地面观测的参数化方案,并把其用于黑河中游地区。同时利用2个景的陆地资源卫星LandsatTM资料进行了分析研究,得到了一些有关非均匀地表的沙漠化地区的区域地表特征参数、植被参数和地表能量通量的新概念。文章最后还讨论了所提出的参数化方案的适用范围和所需的改进之处。
Dealing with the regional land surface heat fluxes and evaporation (evapotranspiration) over inhomogeneous land surface of the middle reaches of the Heihe River is an important but not easy issue. In this study, two parameterization methods based on satellite remote sensing and field observations are proposed and tested for deriving the regional land surface heat fluxes over inhomogeneous landscapes. As cases study, the methods are applied to the middle reaches of the Heihe River. Two scenes of Landsat TM data used in this study are 9 July 1991 and 21 August 1995. The regional distributions of land surface variables, vegetation variables and land surface heat fluxes over inhomogeneous landscape of desertification area are obtained in this study. Further improvement of the methods is also discussed.
出处
《中国沙漠》
CSCD
北大核心
2004年第4期392-399,i001,i002,共10页
Journal of Desert Research
基金
中国科学院"知识创新工程"方向性项目(KZCX3 SW 329和KZCX3 SW 339)
中国科学院寒区旱区环境与工程研究所与日本三菱重工业公司合作研究课题以及日本"改革研究2002"(RR2002 6)资助
关键词
非均匀地表
地表能量通量
地面观测
黑河中游地区
LANDSAT
TM:
inhomogeneous land surface
land surface heat fluxes
Landsat TM
field observation
the middle reaches of the Heihe River
