Environmental Engineering Reference
In-Depth Information
5
5
GKSS MM5
GKSS Cosmo
4
4
3
3
2
2
1
1
0
0
0
6
12
18
24
0
6
12
18
24
Time (hour)
Time (hour)
5
UPM MM5
5
UPM WRF
4
4
3
3
2
2
1
1
0
0
0
6
12
18
24
0
6
12
18
24
Time (hour)
Time (hour)
Fig. 2.
Wind speed at 10 m height, explanation is given in the text
It can be seen (
Fig. 1)
that at the 100 m level for three of the models the predictions
fall inside the representativeness bars of the measurements in the morning.
However for the same period at the 10 m level
(Fig. 2)
, the model prediction is
higher than the measurements and the measurements are outside the range of the
predictability.
It is thus interesting to note that an evaluation study solely at the 100 m level
would suggest good agreement, but including the 10 m level would show that the
prediction of the profile is not good, emphasizing the importance of performing
the evaluation on profiles and not single level measurements.
4. Conclusions
•
Progress in model developments is based on comparison with data.
•
It is essential to evaluate the models on profile measurements, not just
traditional surface measurements.
•
The representativeness of the measurements should be taken into account
in any model evaluation against measurements.
