Dr. Giles M. Marion

Affiliate Associate Research Professor

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 of Interest and Expertise

  • Soil Chemistry
  • Global Climate Change
  • Biogeochemical Process Modeling
  • Planetary Geochemistry

Research Projects


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

Publications & Presentations


Marion, G. M., Murray, A. E., Wagner, B., Fritsen, C. H., Kenig, F., Doran, P. (2013). Carbon Sequestration and Release from Antarctic Lakes: Lake Vida and West Lake Bonney (McMurdo Dry Valleys), Aquatic Geochemistry, 19, (2), 135-145, Springer Netherlands


Verburg, P. S., Young, A. C., Stevenson, B. A., Glanzmann, I., Arnone, J. A., Marion, G. M., Holmes, C., Nowak, R. S. (2012). Do increased summer precipitation and N deposition alter fine root dynamics in a Mojave Desert ecosystem?, Global Change Biology, 19, 948-956, doi: 10.1111/gcb.12082


Caldwell, T. G., McDonald, E. V., Young, M. H., Bacon, S. N., Marion, G. M. (2008). Numerical Simulations of Salt Accumulation in a Hyper-Arid Soil Chronosequence In the Sonoran Desert, Am. Soc. Agron. National Meetings: Houston, TX, Paper 335-9.


Marion, G. M., Pelton, D. K. (2000). Frozen soil barriers for explosives containment, 13 p., CRREL Special Report