PP23C:
What Processes Regulate Atmospheric Carbon Dioxide, and Stabilize Climate, on Earth and Other Planets II Posters

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Session ID#: 12973

Session Description:
It is generally thought that a negative feedback mechanism involving silicate mineral dissolution and carbonate precipitation regulates atmospheric carbon dioxide levels on Earth to maintain a habitable climate over geologic time. The same is likely to be true on rocky exoplanets. However, despite decades of research, there is still debate about how this feedback mechanism works. For example, the relative importance for carbon dioxide consumption of the dissolution of silicate minerals on the continents versus at the seafloor is debated, as is the importance of organic carbon burial. Similarly, the processes that modify global weathering feedbacks, such as changes in lithology at the planet’s surface, are poorly constrained. This session invites contributions that address our understanding of the long-term carbon cycle and climate on Earth and other planetary bodies from a diverse range of approaches and time periods. Contributions from laboratory, field or modeling studies are welcome
Primary Convener:  Laurence A Coogan, University of Victoria, Victoria, BC, Canada
Conveners:  David C. Catling, University of Washington, Department of Earth and Space Sciences, Seattle, United States, John A Higgins, Princeton University, Princeton, United States and A. Joshua West, University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States
Chairs:  David C. Catling, University of Washington, Department of Earth and Space Sciences, Seattle, United States, John A Higgins, Princeton University, Princeton, United States and Laurence A Coogan, University of Victoria, Victoria, BC, Canada
OSPA Liaison:  Laurence A Coogan, University of Victoria, Victoria, BC, Canada

Cross-Listed:
  • B - Biogeosciences
  • EP - Earth and Planetary Surface Processes
  • OS - Ocean Sciences
  • P - Planetary Sciences
Index Terms:

0325 Evolution of the atmosphere [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0428 Carbon cycling [BIOGEOSCIENCES]
1030 Geochemical cycles [GEOCHEMISTRY]
5220 Hydrothermal systems and weathering on other planets [PLANETARY SCIENCES: ASTROBIOLOGY]

Abstracts Submitted to this Session:

The Carbonate-Silicate Cycle on Earth-like Planets Near The End Of Their Habitable Lifetimes (149589)
Andrew Jon Rushby, University of California Irvine, Department of Physics and Astronomy, Irvine, United States, Benjamin Mills, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, Martin Johnson, Centre for Environment, Fisheries & Aquaculture Science (Cefas), Lowestoft, United Kingdom and Mark Claire, University of St Andrews, Department of Earth and Environmental Sciences, St Andrews, KY16, United Kingdom
Limit cycles at the outer edge of the habitable zone (123324)
Jacob D Haqq-Misra, Blue Marble Space Institute of Science, Seattle, WA, United States, Ravi Kopparapu, NASA Goddard Space Flight Center, Solar System Exploration Division, Greenbelt, MD, United States, Natasha E Batalha, Pennsylvania State Univ, University Park, PA, United States, Chester Harman, Columbia University, New York, NY, United States and James F Kasting, Pennsylvania State University Main Campus, Geosciences, University Park, PA, United States
Serpentinization processes: Influence of silica (140103)
Ruifang Huang1,2, Weidong Sun1, Xing Ding1, Maoshuang Song1 and Wenhuan Zhan3, (1)GIG Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China, (2)SCSIO South China Sea Institute of Oceanology, Chinese Acaademy of Sciences, Guangzhou, China, (3)SCSIO South China Sea Institute of Oceanology, Chinese Acaademy of Sciences, Key Laboratory of Marginal Sea Geology, Guangzhou, China
Buffering of potassium in seawater by alteration of basalt in low-temperature, off-axis, hydrothermal systems (153297)
Christiaan Thomas Laureijs and Laurence A Coogan, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada
Using Calcium Isotopic Composition of Calcium Carbonate Veins to Assess the Roles of Vein Formation and Seafloor Alteration in Regulation of the Carbon Cycle (174530)
Florence Chen1, Rosalind M. Coggon2, Damon A H Teagle3 and Alexandra v Turchyn1, (1)University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, (2)University of Southampton, School of Ocean and Earth Science, National Oceanography Centre Southampton, Southampton, United Kingdom, (3)University of Southampton, School of Ocean and Earth Science, Southampton, United Kingdom
Bottom seawater temperature plays a primary role in controlling the dissolution rate of seafloor basalts (142367)
Kathryn M Gillis and Laurence A Coogan, University of Victoria, Victoria, BC, Canada
Seafloor alteration, oxygen isotopes and climate (132498)
Yoshiki Kanzaki1, Lee Robert Kump2 and James F Kasting1, (1)Pennsylvania State University Main Campus, Geosciences, University Park, PA, United States, (2)Pennsylvania State University Main Campus, Department of Geosciences, University Park, PA, United States
The Li-content and isotopic composition of altered upper oceanic crust and the hydrothermal carbonate within it (153365)
Michaella Janelle Yakimoski, Margo Ramsay and Laurence A Coogan, University of Victoria, Victoria, BC, Canada
Seawater Chemistry Across Cretaceous-Tertiary Boundary (180080)
Sambuddha Misra and Alexandra v Turchyn, University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom
Li-isotopic composition of upper oceanic crust: Implications for the link between global change in climate and seawater chemistry over the past 120 Myr  (124576)
Minasadat Seyedali, Laurence A Coogan and Kathryn M Gillis, University of Victoria, Victoria, BC, Canada
Weathering Feedbacks and Atmospheric CO2 during a Silurian Icehouse World: Insights from Os and Li Isotopes (172226)
David S Selby1, Adam David Sproson2, Philip Pogge von Strandmann3, Jindrich Hladil4, Emilia Jarochowska5, Jiri Fryda6, David Loydell7 and Ladislav Slavik4, (1)Durham University, Department of Earth Sciences, Durham, United Kingdom, (2)University of Durham, Durham, United Kingdom, (3)University College London, London, United Kingdom, (4)Institute of Geology of the CAS, Prague, Czech Republic, (5)GeoZentrum Nordbayern, Erlangen, Germany, (6)Czech University of Life Sciences, Prague, Czech Republic, (7)University of Portsmouth, Portsmouth, United Kingdom
Sensitivity of the Marine Strontium Budget and of the Long Term Carbon Cycle to the Composition of Young Igneous Rocks (131846)
Clement Bataille, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States, Amy Willis, Cornell University, Department of Statistical Science, Cornell University, Ithaca, New York 14853, Ithaca, NY, United States, Xiao Yang, University of North Carolina at Chapel Hill, Department of Earth, Marine and Environmental Sciences, Chapel Hill, United States and Xiaoming Liu, University of North Carolina at Chapel Hill, Chapel Hill, United States
Modeling Silicate Weathering for Elevated CO2 and Temperature (187179)
Edward W Bolton, Yale University, Department of Earth and Planetary Sciences, New Haven, United States

See more of: Paleoceanography and Paleoclimatology