Current meteorological data
Air temperature: 43.34 (°F)
6.3 (°C)
Wind speed:11.2 (km/h)
Wind direction: W, 277.5 °
Global radiation: 79.6 (W/m²)
Precipitation: 0.0 (ltr/m²)
(Updated: 12/10/2018, 11:00,
S-Mitte, Schwabenzentrum)
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5. Wind conditions
5.4 Calculated wind roses



Fig. 5-10: Synthetic wind roses in Stuttgart
The representation of the laminar distribution of the wind statistics provides an outline of the average wind conditions in the area under consideration.

The synthetic wind roses result from the combination of the wind field models (chapter 5.3), the calculation of the cold-air flows (chapter 5.2) and the integration of measured wind roses. Synthetic wind roses allow for a direct comparison with recorded wind roses.

Figure 5-10 shows a selection of synthetic wind roses in the region of Stuttgart, figure 5-11 depicts wind roses in the proximity of the plan area for Stuttgart 21. What you can see clearly is the well-known fact that wind roses can differ significantly from one place to another.


Fig. 5-11: Synthetic wind roses in Stuttgart
What you can perceive in figure 5-10 is the strong canalisation of the wind in the Nesenbach valley. The prevailing wind directions here are Southwest and Northeast, while at nearby locations, other wind directions also occur frequently.

The canalisation of the wind in the Nesenbach valley can no longer be recognised in the plan area for Stuttgart 21, as shown in figure 5-11. This effect is narrowly confined to the valley axis. All wind directions are documented several times for the calculated wind roses in the plan area. The influence of cold air flowing in from the Neckar valley is identified on the eastern side of the plan area. What also influences the wind distribution there is the local cold air that flows off from the western elevations (Kriegsberg).




 
 

© City of Stuttgart, Office for Environmental Protection, Section of Urban Climatology