Freiburg 
269 m 
   
Bad Krozingen 
  
E 
C 
238 m o v 
o o. 
Bremgarten © 
212 m i Feldberg 
m 
que—— Á 
AU | 0 4  6km 
      
  
o 
  
  
  
  
   
    
Fig. 1: Topographic sketch of the investigation area 
(circles: Windstations listed in Fig. 2b, 3 
shaded: Urban area of Freiburg i.Br. and area re- 
presented in Fig. 5)