or 

 O 



h- 

 o 

 < 



LL 

 I 



H 



O 



cc 



< 



h- 



g 



00 



20 



40 



60 



80 



100 



C0 2 FRACTION, % 



Fig. 22 Biota growth factor vs. fraction of industrial C0 2 remaining in the 

 lower atmosphere, for various atmosphere-to-ocean transfer times and ocean- 

 surface-layer sizes. The observed fraction in 1970 (42%) is indicated by a 

 vertical line in this figure. Atmosphere-to-ocean transfer time: — , 5 years; 

 -, 7 years. 



0.8 | 



STANDARD 

 RELATIVE SIZE OF TROPOSPHI E (N 



1.0 



lo /N ao» 



Fig. 23 The underestimate of the fraction of industrial C0 2 remaining in the 

 lower atmosphere (troposphere) owing to neglect of the finite transfer time 

 between the upper and lower atmospheres. 



