Education
| Ph.D |
1974 |
University of California, Berkeley |
Soil Chemistry |
| M.S. |
1968 |
Syracuse University |
Forest Soils |
| B.S. |
1965 |
Syracuse University |
Forestry |
| A.A.S. |
1963 |
Paul Smith's College |
Forestry |
Professional Interests
Dr. Marion is currently refining a computer model known as FREZCHEM (FREeZing CHEMistry), which simulates and predicts the behavior of substances at extremely cold temperatures. His interest in thermodynamics led him to develop FREZCHEM, which allows researchers to look at and predict geochemical processes at sub-zero temperatures. The potential applications are numerous, including examining the possibility of life on other planets, mine reclamation in cold regions, gas hydrate stability in oceans, and commercial refrigeration processes.
Marion is currently working on a project for the National Aeronautics and Space Administration (NASA), adding acid chemistry to the model to make it applicable to the behavior of acidic solutions in extremely cold conditions. This research will aid NASA’s understanding of Europa, a frigid moon of Jupiter where patches of ice and frozen sulfuric acid may overlay a briny ocean. Future work includes the use of FREZCHEM to examine microbial life in extreme environments, iron chemistry on Mars, and gas hydrate chemistry on Earth, Mars, and Europa.
Research Areas
- Soil Chemistry
- Global Climate Change
- Biogeochemical Process Modeling
- Planetary Geochemistry
Selected Publications
- Marion, G.M., and J.S. Kargel, 2008:
- Cold Aqueous Planetary Geochemistry with FREZCHEM: From Modeling to the Search for Life at the Limits, Springer, 251 p.
- Gaidos, E. and G.Marion, 2003:
- Geological and geochemical legacy of a cold early Mars. Journal of Geophysical Research 108(E6) pp. 9-1 to 9-19.
- Marion, G.M., 2002:
- A molal-based model for strong acid chemistry at low temperatures (< 200 to 298 K). Geochimica et Cosmochimica Acta 66: 2499-2516.
- Marion, G.M., 2001:
- Carbonate mineral solubility at low temperatures in the Na-K-Mg-Ca-H-Cl-SO4-OH-HCO3-CO3-CO2-H2O system. Geochimica et Cosmochimica Acta 65(14):1883-1896.
- Rustad, L.E., J.L. Campbell, G.M. Marion, R.J. Norby, M.J. Mitchell, A.E. Hartley, J.H.C. Cornelissen, J.
- Gurevitch, and GCTE-NEWS, 2001: A meta-analysis of the response of soil respiration, net nitrogen mineralization, and aboveground plant growth to experimental ecosystem warming. Oecologia 126:543-562.
- Kargel, J.S., J.Z. Kaye, J.W. Head III, G.M. Marion, R. Sassen, J.K. Crowley, O.P. Ballesteros, S.A. Grant,
- and D.L. Hogenboom, 2000: Europa's crust and ocean: Origin, composition, and the prospects of life. Icarus 148:226-265.
- Marion, G.M., R.E. Farren, and A.J. Komrowski, 1999:
- Alternative pathways for seawater freezing. Cold Regions Science and Technology 29:259-266.
- Marion, G.M. and R.E. Farren, 1999:
- Mineral solubilities in the Na-K-Mg-Ca-Cl-SO4-H2O System: A re-evaluation of the sulfate chemistry in the Spencer-Møller-Weare model. Geochimica et Cosmochimica Acta 63:1305-1318.
- Morse, J.W. and G.M. Marion, 1999:
- The role of carbonates in the evolution of early martian oceans. American Journal of Science 299:738-761.
- Arft, A.M., M.D. Walker, J. Gurevitch, and others (26), 1999:
- Responses of tundra plants to experimental warming: Meta-analysis of the International Tundra Experiment. Ecological Monographs 69:491-511.
- Marion, G.M., G.H.R. Henry, D.W. Freckman, J. Johnstone, G. Jones, M.H. Jones, E. Levesque, U. Molau, P.
- Molgaard, A.N. Parsons, J. Svoboda, and R.A. Virginia, 1997:Open-top designs for manipulating field temperature in high-latitude ecosystems. Global Change Biology 3(suppl. 1):20-32.
- Marion, G.M., 1997:
- A theoretical evaluation of mineral stability in Don Juan Pond, Wright Valley, Victoria Land. Antarctic Science 9:92-97.
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