Remote Sensing Parameterization of Meso-scale ...
FluxWm- 2
600
:: ............. : ........................................................... .
:: ~ .. , .. ~~:~:-:~;::~:~~.,.~
Or-~--------~~~~---------4~~
-100 '--'---'--'--'---'----'_-'-_.J.......--'_-'---.5
6
7
8
9
10 11
12 13 14 15 16 17
...•... Net radiation
~ Sensible heat flux
GMT (hour)
- • - Soil heat flux
- -0- - Latent heat flux
421
Figure 15.13: Daytime surface energy balance of a heterogeneous and partially vegetated
landscape with a 4 km horizontal scale near Tomelloso, June 29, 1991. UTM (x,y) 591168.0,
4334868.0.
FluxWm- 2
Evaporative fraction (-)
400
A
0.8
.B
0.7
300
0.6
0.5
200
0.4
- - Sensible heat flux
0.3
- 0 -
Latent heat flux
0.2
. . .
0.1
. I
0
0
7 8 9 10 11 12 13 14 15 16
6 7 8 9 10 11 12 13 14 15 16 17
GMT (hour)
GMT (hour)
Figure 15.14: Daytime surface energy balance for the entire EFEDA grid-square with a 85
km x 125 km horizontal scale, June 29, 1991.
Part B of Fig. 15.14 shows the Bowen-ratio and evaporative fraction. Although Shuttleworth
et al. (1989) found A to be temporally stable for homogeneous land surfaces, we conclude that
the same holds true for heterogenoues land surfaces at a horizontal length scale of 100 km. Fig.
15.14 indicate that temporal stability especially emerges between 10:00 and 14:00 GMT.