Air: 



C0 2 , 10 2 moles,m 2 



Erosion and 

 metamorphism 



Sediment: 



CaC0 3 , MgCafCO^ 



7 9 



and kerogen, 10 moles m 



Sea: 



C0 2 + HC0 3 + CO 2 ", 10 4 moles m : 



Plate " Organism 



tectonics debris 



Sediment 10 years 



10 3 



7 2 c 



10 moles/m M se diment 



T 5 



Air and sea 1 years 



10 4 moles/m 2 ^a.r an 



and sea 



Ocean economics 



Fig. 1 The carbon cycle of the earth. 



IC0 2 = 2.00 moles m 3 

 5 13 C = 2.0"™ 



Warm surface 



r~ = 1500 years 



Deep sea 



SC0 2 = 2.45 moles/m 3 

 5 13 C = 0.0%« 

 5 14 C = -200%„ 



ZC0 2 = 2.25 moles/m 3 

 5 13 C= 1.0%o 

 o 14 C = -100°/oo 



Fig. 2 The carbon cycle of the ocean. 



