ON THE USE OF SATELLITE THERMAL DATA FOR DETERMINING EVAPOTRANSPIRATION IN PARTIALLY VEGETATED AREAS

被引:18
作者
CASELLES, V
SOBRINO, JA
COLL, C
机构
[1] Department of Thermodynamics, University of Valencia, Burjassot
关键词
D O I
10.1080/01431169208904071
中图分类号
TP7 [遥感技术];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
The use of satellite data for determining daily evapotranspiration over completely vegetated areas has been analysed by different authors. However, if the soil surface is partially covered by vegetation the problem becomes more complicated, because in this case the value of the temperature measured by the satellite varies with the viewing geometry. In this work we have studied the influence of the satellite observation angle for crops with different cover degree, field geometry and ground emissivity. For this purpose we have used the simplified relation proposed by Jackson et al. LET(d)=R(nd)-B(T(s)-T(a))i where ET(d) and R(nd) are the daily values of evapotranspiration and net radiation respectively, (T(s)-T(a))i is the difference between crop surface and air temperatures measured at midday, B is a semi-empirical parameter, and L is the latent heat of vaporization of water. And we have concluded that the imposition of a single value of B is unacceptable and specific values must be chosen according to certain broad categories of the viewing geometry, whose number will depend on the geometry of each crop.
引用
收藏
页码:2669 / 2682
页数:14
相关论文
共 51 条
[1]   DIRECTIONAL THERMAL INFRARED EXITANCE DISTRIBUTIONS FROM A LEAFLESS DECIDUOUS FOREST [J].
BALICK, LK ;
HUTCHINSON, BA .
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 1986, 24 (05) :693-698
[2]   AERIAL THERMAL SCANNER TO DETERMINE TEMPERATURES OF SOILS AND OF CROP CANOPIES DIFFERING IN WATER STRESS [J].
BARTHOLIC, JF ;
WIEGAND, CL ;
NAMKEN, LN .
AGRONOMY JOURNAL, 1972, 64 (05) :603-+
[3]   MEASUREMENT OF ANGULAR EMISSIVITY BY REFLECTION IN THERMAL INFRARED - IMPLICATIONS FOR TELEDETECTION [J].
BECKER, F ;
NERRY, F ;
RAMANANTSIZEHENA, P ;
STOLL, MP .
INTERNATIONAL JOURNAL OF REMOTE SENSING, 1986, 7 (12) :1751-1762
[4]  
BECKER F, 1981, P INT C SPECTRAL SIG, V5, P57
[5]  
Carlson T. N., 1986, REMOTE SENS ENVIRON, V1, P197, DOI DOI 10.1080/02757258609532069
[6]   ON ESTIMATING TOTAL DAILY EVAPOTRANSPIRATION FROM REMOTE SURFACE-TEMPERATURE MEASUREMENTS [J].
CARLSON, TN ;
BUFFUM, MJ .
REMOTE SENSING OF ENVIRONMENT, 1989, 29 (02) :197-207
[7]  
CARNAHAN B, 1979, APPLIED NUMERICAL ME
[8]   DETERMINATION OF THE EFFECTIVE EMISSIVITY AND TEMPERATURE UNDER VERTICAL OBSERVATION OF A CITRUS ORCHARD - APPLICATION TO FROST NOWCASTING [J].
CASELLES, V ;
SOBRINO, JA ;
BECKER, F .
INTERNATIONAL JOURNAL OF REMOTE SENSING, 1988, 9 (04) :715-727
[9]   A SIMPLE-MODEL TO ESTIMATE THE DAILY VALUE OF THE REGIONAL MAXIMUM EVAPOTRANSPIRATION FROM SATELLITE TEMPERATURE AND ALBEDO IMAGES [J].
CASELLES, V ;
DELEGIDO, J .
INTERNATIONAL JOURNAL OF REMOTE SENSING, 1987, 8 (08) :1151-1162
[10]   DETERMINATION OF FROSTS IN ORANGE GROVES FROM NOAA-9 AVHRR DATA [J].
CASELLES, V ;
SOBRINO, JA .
REMOTE SENSING OF ENVIRONMENT, 1989, 29 (02) :135-146