Measuring Meteorology in Urban Areas – Some Progress and Many Problems - Meteorological and Air Quality Models for Urban Areas - page 115

200

Fig. 12.4 Mean wind
direction above a 25 m high
forest

160

120

80

40

188 189 190 191 192

Mean wind direction (degrees)

10.8

10.4

10

9.6

9.2

20 30 40 50 60

Distance from mast (m)

2.2

2

1.8

1.6

1.4

20 30 40 50 60

Distance from mast (m)

Fig. 12.5 Horizontal variability of the mean wind speed at 40 m above the ground in a 25 m high
forest: high wind conditions ( upper panel ) and low wind conditions ( lower panel )