Sensitivity Tests in the Dynamical and Thermal Part of the MRF-Urban PBL Scheme in the MM5 Model - Meteorological and Air Quality Models for Urban Areas - page 82

NOA Marousi

400 400

measurements
MRF-urban
MRF
MRF-dyn
MRF-ther

measurements
MRF-urban
MRF
MRF-dyn
MRF-ther

350 350

300 300

250

250

200 200

150 150

100

100

50 50

0

0

-50

-50

02468 0 2 4 6 8 0 2 4

02468 0 2 4 6 8 0 2 4

time (h) LT

time (h) LT

(a)

(b)

NOA

Marousi

0.7

0.7

measurements
MRF-urban
MRF
MRF-dyn
MRF-ther

0.6 0.6

mesurements
MRF-urban
MRF
MRF-dyn
MRF-ther

0.5 0.5

0.4 0.4

0.3 0.3

0.2

0.2

0.1 0.1

0

0

02 468 0 2 4 6 8 0 2 4

02 4 6 8 1012141618202224

time (h) LT time (h) LT

(d)

(c)

Fig. 10.4 Time series (local diurnal cycle) of sonic anemometer turbulence measurements of sen-
sible heat flux ( a and b ) and friction velocity ( c and d ) at the NOA and Marousi sites, at 15 m agl,
together with MRF, MRF-urban, -dyn and -ther modelling results on 14 September 1994

m/s
-1.50 to -1.25
-1.25 to -1.00
-1.00 to -0.75
-0.75 to -0.50
-0.50 to -0.25
-0.25 to 0.00
0.00 to 0.25
0.25 to 0.50
0.50 to 0.75
0.75 to 1.00
1.00 to 1.25
1.25 to 1.50
1.50 to 1.75
1.75 to 2.00
2.00 to 2.50

m/s
-1.50 to -1.25
-1.25 to -1.00
-1.00 to -0.75
-0.75 to -0.50
-0.50 to -0.25
-0.25 to 0.00
0.00 to 0.25
0.25 to 0.50
0.50 to 0.75
0.75 to 1.00
1.00 to 1.25
1.25 to 1.50
1.50 to 1.75
1.75 to 2.00
2.00 to 2.50

45 45

40 40

35 35

30 30

Marousi Marousi

25 25

NOA

Peiraias
NOA

Peiraias

20 20

15 15

10 10

5 5

5 0 5 0 5 0 5 0 5 0 5
(x 2km)

5 0 5 0 5 0 5 0 5 055
(x 2km)

(a) (b)

Fig. 10.5 The spatial distribution of horizontal wind speed differences in m s − 1 (at 10 m agl)
between the MRF-urban and 'no-city' run, at ( a )3:00LSTand( b ) 14:00 LST on 15 September
1994