CLIMATIC DIAGRAMS 



DOUALA (13m) 

 1 10) 



26,^ 39A8 



353 

 30- 



-72 



/ 



( 1 



k 



-JO 



Fig. 5 



Figures 1-5. Explanation of climatic diagrams. 

 a-Station. 

 b -Altitude, 

 c- Number of years of observation (the first stands for temperature, the second for 



precipitation). 

 d-Mean annual temperature in °C. 

 e-Mean annual amount of precipitation in mm. 



f-Mean daily minimum of the coldest month. 



g- Absolute minimum. 



h-Mean daily maximum of the hottest month. 



i- Absolute maximum. 



j-Mean daily range of temperature. 



k- Monthly means of temperature (thin line) in °C. 



1-Monthly means of precipitation (thick hne) in mm. 

 m-Arid period (dotted area), 

 n- Humid period (hatched area). 



o-Perhumid area (black area), mean monthly rainfall over 100 mm (scale reduced 

 ten times). 



p-Additional precipitation curve (io°C=30 mm) showing the less extreme dry 



period. 

 q-Months with a mean daily minimum below o°C. 

 r-Months with an absolute minimum below o°C. 

 s-Mean number of frost-free days. 



