98 



BACASTOW AND KEELING 



O 



CO 

 CO 



CO 



14 



J'7 e r ' dt 



Total industrial co 



2000 1000 



500 



250 



r dm , YEARS 



b) 



Fig. 2) instead of the considerably larger exponentially rising production values 

 of Bolin and Eriksson (nearly 50% higher near 1954) further reduces the 

 predicted Suess effect; including borate in the calculations and stepping £ 

 reduces it still further. After all these changes are made, the predicted Suess 

 effect is close to the observed value, but the predicted C0 2 increase agrees with 

 the expected value of about 5% only if the deep-ocean to surface-layer transfer 

 time, Td m , is about 100 years, a time that is much too short. 



