Vernadsky-Brown Microsymposium 41
Climate Change in Mars History:
Geological Evidence and Implications for Climate Evolution

March 12-13, 2005
Lunar and Planetary Institute
3600 Bay Area Boulevard, Houston, Texas 77058

Saturday, March 12

1:00 PM: Noachian-Hesperian Environments and Climate Change

Rossman Irwin: A hiatus and brief intense reactivation of martian valley networks around the Noachian/Hesperian transition.

John Mustard and the OMEGA team: Syrtis Major: Evidence for changes in weathering styles with time.

Aline Gendrin and the OMEGA team: Evidence for sulfates from Mars Express OMEGA data.

Francois Poulet and the OMEGA team: Evidence for hydrated silicates from Mars Express OMEGA data.

Mark Bullock and Jeff Moore: Atmospheric conditions on early Mars and the lack of carbonate deposits.

2:15 PM: Posters: Two minute oral summary for each; posters displayed during poster/session reception.

1. Caleb Fassett: Observations on valley networks and climate change: Hecates snowpack melting and Noachian subaqueous delta formation.

2. Nicolas Mangold: Valley networks in the Valles Marineris region: An update.

3. Joseph Levy: Evidence for remnants of Late Hesperian ice-rich deposits in the Mangala Valles outflow channel.

4. Devon Burr Terrestrial pingos and application to Mars climate change.

2:25 PM: Amazonian Environments and Climate Change 1: Polar Deposits and Hydrogen-Related Deposits:

Jeff Plaut: SPLD crater population: Implication for climate.

Sarah Milkovich: Mars north polar deposits: Recognition of a fundamental climate signal and implications for polar accumulation rates and processes.

Francois Levrard: A GCM recent history of northern martian polar layered deposits.

Melinda Kahre: GCM simulations of the dust cycle at different obliquities: Evolution of surface dust deposits with time.

Yves Langevin and the OMEGA team: Evidence for gypsum in the north circumpolar dune deposits.

Steven Nelli et al.: Using GCMs to assess topographic control of hydrogen deposits at mid-to-low latitudes on Mars.

Ralph Milliken and the OMEGA team: Application of OMEGA data to estimation of total water content of the surface of Mars.

4:10 PM: Posters: Two-minute oral summary for each; posters displayed during poster/session reception.

1. Mikhail Kreslavsky: Mars at low obliquity: The role of surface topography in determining the distribution of CO2 deposits.

2. John Wilson: Effects of atmospheric opacity on the seasonal variation of martian surface temperature.

4:15 PM: Amazonian Environments and Climate Change 2: Glacial Deposits:

David Shean: Debris-covered glaciers with the Arsia Mons fan-shaped deposit: Implications for glaciation , deglaciation and the origin of lineated valley fill.

James Fastook: Ice sheet modeling: Mass balance relationships for map-plane ice sheet reconstruction: Application to Tharsis Montes glaciation.

James Head: Regional mid-latitude Late Amazonian valley glaciers on Mars: Origin of lineated valley fill and implications for recent climate change.

Ernst Hauber and the HRSC team: Glacial deposits in the Hecates Tholus region.

Francois Forget: Climate model simulations of past climate on Mars: Recent glacier formation and climate change resulting from a thicker CO2 atmosphere.

Carlton Allen: Ice-rich layer in the martian mid-latitudes: Cratering evidence of age and thickness.

Mary Chapman: Evidence for very young glacial deposits in central Candor Chasma, Mars.

Jorn Helbert: Beyond the equilibrium paradigm: Glacial deposits in the equatorial region of Mars.

William Hartmann: Continuing work on mantled and possible glacial surface timescales: Is there a link to obliquity cycle timescales?

Benjamin P. Weiss: Martian surface paleotemperatures from thermochronometry of meteorites.

6: 45 PM: Posters: Two-minute summary for each; posters displayed during poster/session reception.

1. Ken Tanaka: Climate history of the Amazonian Period on Mars deduced from the geology of the northern plains and polar regions.

2. Chris Woodworth-Lynas: Evidence for floating ice in the Echus Chasma/Kasei Valles valley system.

3. Rebecca Parsons: Ascraeus Mons fan-shaped deposit, Mars: Geological history and volcano-ice interactions of a cold-based glacier.

4. Claire Lackner and N.athan Bridges: Age-orientation relationships of northern hemisphere martian gullies and "pasted-on" mantling unit: Implications for near-surface water migration in Mars' recent history.

5. James Dickson: Detection of gullies on central peaks and crater rims on Mars: Implications for the origin of gullies.

6. Alexander Basilevsky: Evidence for the presence of water ice in Olympus Mons construct from analysis of HRSC and MOC data.

7:00 PM Posters and Reception: The Great Room

7:45 PM Adjourn for the Day.

Sunday, March 13, 2005: Summary and Overview:

8:30 AM
Gerhard Neukum and the HRSC team:
Synthesis of HRSC data on Mars climate change.

9:00 AM
Jean-Pierre Bibring and the OMEGA team:
Synthesis of Mars Express OMEGA results for Mars climate change.

9:30 AM
Francios Forget:
Mars climate with a thicker atmosphere: Applications to the Noachain and Hesperian.

10:00 AM:
William Boynton:
Odyssey GRS results on H distribution in high-latitude and polar regions and implications for depth to an ice-rich layer.

10:30 AM:
Michael Mischna
GCM simulations of the tropical hydrogen distribution observed by Mars Odyssey.

11:00 AM
Matthew Golombek and the Athena Science Team:
Climate change on Mars: From wet in the Noachian at Meridiani to dry and desiccating in the Hesperian/Amazonian plains of Gusev.

11:30 AM
Dave Marchant:
Equilibrium landforms in the Dry Valleys of Antarctica: Implications for landscape evolution and climate change on Mars.

12: 00 Noon:
Jim Head and Jack Mustard:
Geological evidence for climate change in the history of Mars: Synthesis.

12:30 PM: Adjourn.