erg 
  
  
  
  
de 
  
  
Fig. 2a: Wind speed and wind direction at 10 stations in the 
urban area of Freiburg under the influence of the 
mountain wind system 
delimits the Black Forest - Rhine Valley boundary; 
see also Fig. l. 
Fig. 2b: 
(20.9.71, 5 h). The solid line 
Wind speed and wind direction at the 4 stations shown 
in Fig. | (1.4.76, 0 - 7 h) O 2 4 m/sec 
  
  
h 
Bremgarten 
Bad Krozingen 
      
Freiburg 
Feldberg