A NEW LOOK AT THE SIMPLIFIED METHOD FOR REMOTE-SENSING OF DAILY EVAPOTRANSPIRATION

被引:240
作者
CARLSON, TN [1 ]
CAPEHART, WJ [1 ]
GILLIES, RR [1 ]
机构
[1] PENN STATE UNIV,CTR EARTH SYST SCI,UNIVERSITY PK,PA 16802
关键词
D O I
10.1016/0034-4257(95)00139-R
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A modification of the so-called ''Simplified Method'' used to obtain the integrated daily evapotranspiration from surface radiant temperature over variable vegetation cover is proposed. Mathematically, the simplified equation takes the form Rn-24 - LE(24) = B(T-013 - T-a13)(n), where Rn-24 and LE(24) are, respectively, the integrated net radiation and evapotranspiration over a 24-h period and T-013 and Ta-13 are, respectively, the surface radiant and the 50-m air temperatures at 1300 local time. B and n are pseudo constants given as functions of the normalized difference vegetation index (NDVI), expressed as a scaled index N*. Both N* and T-a13 are obtained with the aid of remotely determined measurements, which are viewed on scatterplots of T-013 versus NDVI.
引用
收藏
页码:161 / 167
页数:7
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