P23E:
The Early Mars Environment: Warm and Wet, Cold and Wet, or Cold and Icy? II

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Session ID#: 14996

Session Description:
Geological, geochemical and mineralogical evidence indicative of flowing and ponding liquid water on the surface of ancient Mars appears abundantly across most of the Martian landscape. However, the presence of liquid water on the surface of early Mars is difficult to reconcile with the reduced solar luminosity at 3.8 Ga. and before, unless greenhouse warming is considered. But the scarcity of carbonate rocks on the martian surface and the absence of evidence for vigorous recycling of volatiles cause many researchers to regard warming mechanisms as speculative. This leaves still open the question of how the observed fluvial features could have formed. We invite contributions from climate modeling, geomorphology, geochemistry and mineralogy that address the question of whether early Mars climate was “warm and wet”, “cold and wet” or “cold and icy”. This session will focus on both sharing new results from different perspectives and fostering communication among the community.
Primary Convener:  Alberto G. Fairén, Cornell University, Ithaca, NY, United States; Centro de Astrobiologia, Madrid, Spain
Conveners:  Stephen M Clifford, Lunar and Planetary Institute, Houston, TX, United States and James F Kasting, Pennsylvania State University Main Campus, Geosciences, University Park, PA, United States
Chairs:  Stephen M Clifford, Lunar and Planetary Institute, Houston, TX, United States, Alberto G. Fairén, Cornell University, Ithaca, NY, United States; Centro de Astrobiologia, Madrid, Spain and James F Kasting, Pennsylvania State University Main Campus, Geosciences, University Park, PA, United States
OSPA Liaison:  Alberto G. Fairén, Cornell University, Ithaca, NY, United States; Centro de Astrobiologia, Madrid, Spain

Cross-Listed:
  • EP - Earth and Planetary Surface Processes
Index Terms:

5405 Atmospheres [PLANETARY SCIENCES: SOLID SURFACE PLANETS]
5419 Hydrology and fluvial processes [PLANETARY SCIENCES: SOLID SURFACE PLANETS]
6225 Mars [PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS]

Abstracts Submitted to this Session:

The Frustrating Lives of Climate Scientists – 45 Years of Warm, Cold, Wet and Dry (Invited) (122160)
Owen B Toon, University of Colorado at Boulder, Boulder, CO, United States, Victoria Hartwick, University of Colorado at Boulder, Boulder, United States and Richard A Urata, NASA Ames Research Center, Moffett Field, CA, United States
The climate of early Mars: New insights from climate modeling and geological intercomparisons (Invited) (129245)
Robin Wordsworth, Harvard University, School of Engineering and Applied Sciences, Cambridge, MA, United States
Extensive Noachian fluvial systems in Arabia Terra: Implications for early martian climate (158841)
Peter M Grindrod, University College London, London, United Kingdom, Joel Davis, Imperial College London, Department of Earth Science and Engineering, London, United Kingdom, Matthew R Balme, The Open University, School of Physical Sciences, Milton Keynes, United Kingdom, Rebecca M. E. Williams, Planetary Science Institute, Tucson, United States and Sanjeev Gupta, Imperial College London, London, SW7, United Kingdom
Predictions and Tests of the “Late Noachian Icy Highlands” Climate Model: Can Evidence for Fluvial/Lacustrine Systems Be Reconciled? (174494)
James W Head III, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, United States
The Case For A Warm Wet Early Mars (150904)
Robert Anthony Craddock, Smithsonian Institution, Center for Earth and Planetary Studies, National Air and Space Museum, Washington, DC, United States, Alan D Howard, University of Virginia, Charlottesville, VA, United States and Rossman P Irwin III, Smithsonian Institution, Washington, DC, United States
An Outrageous Geological Hypothesis for the Early Mars Hydro-climatic Conundrum (160615)
Victor R Baker, University of Arizona, Department of Hydrology and Atmospheric Sciences, Tucson, AZ, United States
A Narrowing Target for Early Mars Climate Models: Which Models Survive Confrontation with Improved Hydrology Constraints? (163697)
Edwin S Kite, University of Chicago, Department of the Geophysical Sciences, Chicago, IL, United States, Dr. Colin Goldblatt, PhD, University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada, Peter Gao, Carnegie Institution for Science, Earth & Planets Laboratory, Washington, DC, United States, David P Mayer, USGS Astrogeology Science Center, Flagstaff, AZ, United States, Jonathan Sneed, University of Chicago, Chicago, IL, United States and Sharon A. Wilson, Smithsonian National Air and Space Museum, Center for Earth and Planetary Studies, Washington, DC, United States

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