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A TEMPERATURE REGULATED ORGANIC CARBON CAPACITOR ON EARTH’S SURFACE Gerald R. Dickens PowerPoint Presentation
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A TEMPERATURE REGULATED ORGANIC CARBON CAPACITOR ON EARTH’S SURFACE Gerald R. Dickens Rice University (and Nemanja Komar , Benjamin Slotnick , Christopher Hollis, Richard Zeebe ). Glomar Challenger. Lower Paleogene DSDP Site 577. [ Dickens & Backman , News. Strat ., 2013 ].

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A TEMPERATURE REGULATED ORGANIC CARBON CAPACITOR ON EARTH’S SURFACE Gerald R. Dickens


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    1. A TEMPERATURE REGULATED ORGANIC CARBON CAPACITOR ON EARTH’S SURFACE Gerald R. Dickens Rice University (and NemanjaKomar, Benjamin Slotnick, Christopher Hollis, Richard Zeebe )

    2. Glomar Challenger

    3. Lower Paleogene DSDP Site 577 [Dickens & Backman, News. Strat., 2013]

    4. ~100m Mead Stream, New Zealand [ Hollis et al., 2004 ]

    5. Late Paleocene- Early Eocene Carbon Isotope Records [Slotnick et al., Journal of Geology, 2012]

    6. PETM at Mead Stream, New Zealand [Nicoloet al.,Paleoceanography, 2010]

    7. A Carbon Input to the Phanerozoic Carbon Cycle Anthropogenic F = 8.00 Ant Inputs = -30.0 d Ant F = 0.60 In = -5.0 d In M = 1400 M = 3400 Atm Bio = -7 = -28.5 d d Atm Bio Outputs Volcanoes Atmosphere Biosphere F = 0.60 Out = -5.0 d Out F = 0.072 Vol = -5.0 d Vol Organics Weathering F Org = 0.13 = -28.5 d Org F = 0.12 Weat = -22 d Weat Carbonate Rivers Ocean F Carb = 0.47 = 1.5 d F = 0.408 M = 51200 Carb Riv Oc = 0.0 d Riv = 0.5 d Oc M = 56000 = -1.45 Ex d Ex [adapted from Kump & Arthur, Chem. Geol., 1999]

    8. Theoretical Carbon Inputs for Rapid, Global Negative d13C Excursions 0 dAdd = -5 ‰ dAdd = -5 ‰ -1 100,000 dAdd = -22 ‰ dAdd = -22 ‰ Exogenic Composition, dEx (‰) Carbon Injection, MEx (Gt) dAdd = -60 ‰ -2 10,000 IPCC dAdd = -60 ‰ -3 1,000 -4 100 300 300 0 100 200 0 100 200 Time (kyr) Time (kyr) [ Dickens, Geol. Soc. London, 2001 ]

    9. Ken Caldeira

    10. Dickens, Bull. Soc. Geol. France, 2000

    11. PETM at Walvis Ridge Zachos et al., Proc ODP Inti. Repts., 208, 2004

    12. Predicted Change in Pacific Dissolved Oxygen by AD 2680 (mmol/km3) [ Hollis et al., 2004 ] [ Matear & Hirst, Global Biogeochemical Cycles, 2003 ]

    13. PETM at Mead Stream [Nicoloet al., Paleoceanography, 2010]

    14. [ IPCC, 2007 ]

    15. [Slotnick et al.,Journal of Geology, 2012]

    16. Figure 7.3: Global Carbon Cycle [IPCC, 2007]

    17. A Simple Capacitor for Global Carbon Isotope Excursions Seafloor Methane (Peat/Permafrost) [ adapted from Dickens, EPSL, 2003]

    18. Carbon Isotope Records at DSDP Site 577 Carbon Release (long-term & short-term) Carbon Storage (long-term) [Dickens and Backman, News. Strat., 2013]

    19. Sulfur Isotopes (Correct Age) [original sulfur data from Paytan et al., 1996]

    20. Gas Hydrate, AOM and Sulfur Cycling 12CH4 + SO42- ---> H12CO3- + HS- + H2O 2CH2O ---> 12CH4 + 13CO2 [ Snyder et al., Deep-Sea Res., 2007 ]

    21. Alkalinity (HCO3-) SO42- Solid S [ Snyder et al., Deep-Sea Res., 2007 ]

    22. Welcome to the Dark Side: Lee’s Paleogene Machine [Dickens, Climate of Past, 2011]

    23. Long-term Model Results [Komar et al., Paleoceanography, in press]

    24. DSDP Site 259 (Indian Ocean) [Hancock et al., 2007]

    25. [Expedition 346 Scientists, 2014]

    26. Back to the Future? Absolutely. The Eocene is forcing future science forward.