20 



:z 



E 



O 

 (_> 



_J 

 < 



10 . 



200 



CH 4 . nM 



400 



Figure 7. Total C0 2 versus CH 4 concentrations measured at Pele's 

 Vent. The linear regression analysis was: COo = 2.235 + 

 4.514CH 4 . 



211 



