CONTENTS 



SESSION I: The Cycle of Carbon 



Chairman: George M. Woodwell 



The Biosphere 1 



Daniel A, Livingstone 



The C Cycle and Its Implications for Mixing 



Rates in the Ocean-Atmosphere System 6 



Minze Stuiver 



Prediction of C0 2 in the Atmosphere 21 



Lester Machta 



Factors Controlling C0 2 Content in the Oceans 



and Atmosphere 32 



Wallace S. Broecker 



SESSION II: The Atmosphere 



Chairman: William W. Kellogg 



Atmospheric Carbon Dioxide and Radiocarbon 

 in the Natural Carbon Cycle 



I. Quantitative Deductions from the Records at 



Mauna Loa Observatory and at the South Pole .... 51 

 Carl A. Ekdahl, Jr., and Charles D. Keeling 



II. Changes from A.D. 1700 to 2070 as Deduced 



from a Geochemical Model 86 



Robert Bacastow and Charles D. Keeling 



Atmospheric Carbon Monoxide 136 



Richard D. Cadle 



