ATMOSPHERIC CARBON DIOXIDE AND RADIOCARBON: II 



133 



where i refers to the iteration, was repeated until the magnitude 



|[H + ] i+1 -[H + ]i 



[H + ] 



was less than 10 .A new value of P m was then calculated, and £ and <p were 

 evaluated. 



APPENDIX E: NUMERICAL VALUES OF MODEL PARAMETERS 



Unless otherwise indicated, all numerical values, together with their 

 references, are as given by Keeling. 



Parameter 



Pco 2 



M a 



W s 



Cd 



Cm 

 C org 



Parameter 



Pco 2 



M a 

 W s 

 Cd 



-m 

 -org 



ao 



N 



N U0 

 Nlo 



Nmn/N 



N 

 W 



mo 

 mo 



ao 



m 



Definition 



Preindustrial C0 2 partial pressure in atmosphere expressed as mixing ratio 



Total atmospheric mass excluding water vapor 



Total ocean volume 



Total carbon concentration in deep ocean 



Inorganic-carbon concentration in surface ocean 



Dissolved organic-carbon concentration in surface ocean 



Value or Equation for Calculating Value 



290 ppM (parts per million of C0 2 relative to dry air) 



5119 x 10 1 8 g of dry air 



1370 x 10 1 8 liters 



0.0284 g/liter 



(12.011 g/mole)(0.002057 mole/liter) 



0.001 g/liter 



1 ( 1 2.01 1 g/mole)/(28.946 g/mole)] p co M a = 6. 1 56 x 10' 8 g of C 



0. 1 5N ao (as given by Machta 3 9 ) 



N 



N, 



ao "uo 

 Variable parameter 



(N rn o/Nao)N ao 

 ^mo'^m + C or g) 



