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Cerling and Quade, Stable carbon and oxygen isotopes in soil carbonates.

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Presentation on theme: "Cerling and Quade, Stable carbon and oxygen isotopes in soil carbonates."— Presentation transcript:

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5 Cerling and Quade, 1993. Stable carbon and oxygen isotopes in soil carbonates

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8 Anthropogenic CO2

9 Carbonate solution chemistry
CaCO3 + H2O + CO2  Ca2+ + 2HCO3-

10 Romanek, Grossman, and Morse, 1992 Faure and Mensing

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13 Biological Carbon Pump

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17 Diagenesis

18 Diagenesis

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20 Paleo-CO2 proxy?

21 d13C of terrestrial carbonates in equilibrium with various carbon sources
Final d13C value is a result of mixing of the four various reservoirs Dominated by Soil-respired CO2 and hence vegetation type contributing OM to soils

22 Dorale et al. 1998. Science, Vol 282, Issue 5395, 1871-1874

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25 Extra slides

26 Bradley, 1999. Paleoclimatology

27 Bradley, 1999. Paleoclimatology

28 From: Koch, P.L., 1998. Ann. Rev. Earth Plan. Sci., 26: 573-613

29 From: Koch, P.L., 1998. Ann. Rev. Earth Plan. Sci., 26: 573-613

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31 From: Koch, P.L., 1998. Ann. Rev. Earth Plan. Sci., 26: 573-613

32 Evolution of horses and C4 vegetation

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