1. the “natural” carbon cycle speciation of CO2 in seawater
Geol
week 2

2. natural carbon stocks and flows
ocean
DIC: 38,000
DOC: 600
living C: 1
land
living C: 500
dead C: 1500 90 90
60 GTC/y
atmosphere
700
metamorphism
CaCO3 + SiO2 CaSiO3 + CO2 <0.1 GTC/yr
weathering
CaSiO3 + CO2  CaCO3 + SiO2
<0.1 GTC/yr
sedimentary rocks
CaCO3 + OC: 50,000,000
fossil fuels: 5000
stocks in GTC (gigatons C = 1015 g C)
transfer fluxes in GTC/year
Archer ‘07

3. the long-term C-cycle organic inorganic CO2 + H2O CH2O + O2
CaSiO3 + CO CaCO3 + SiO2
Berner ‘03

4. what is c for different reservoirs?
ocean
DIC: 38,000
DOC: 600
living C: 1
land
living C: 500
dead C: 1500 90 90
60 GTC/y
atmosphere
700
metamorphism
CaCO3 + SiO2 CaSiO3 + CO2 <0.1 GTC/yr
weathering
CaSiO3 + CO2  CaCO3 + SiO2
<0.1 GTC/yr
sedimentary rocks
CaCO3 + OC: 50,000,000
fossil fuels: 5000
stocks in GTC (gigatons C = 1015 g C)
transfer fluxes in GTC/year
Archer ‘07

5. CO2 and temperature (Vostok, Ant.)
Petit et al. 1999

6. G-I perturbation budget (GtC)
atm
surface ocean
biota to +600
deep ocean to -800
~ Sundquist ‘93

7. glacial age physical perturbations
preindustrial
DIC+TA x 1.03
S x 1.03
T= -1 K
LGM
Zeebe & Wolf-Gladrow ‘01