Hello Francois Risacher,
I hope these references will be of use.  They are not directly relatedto
your question, but may
contain some helpful tidbits.  I'd be happy to send you copies of any of
these references.  Good Luck!

Aldaz, L. and S. Deutsch (1967). "On a relationship between air
temperature and oxygen isotope ratio of snow and firn in the South Pole
Region." Earth and Planetary Letters 3: 267-274.
Claassen, H. C. and J. S. Downey (1995). "A model for dueterium and
oxygen 18 isotope changes during evergreen interception of snowfall."
Water Resources Research 31(3): 601-618.
Deutsch, S., W. Ambach, et al. (1966). "Oxygen isotope study of snow and
firn on an alpine glacier." Earth and Planetary Science Letters 1:
197-201.
Friedman, I., C. Benson, et al. (1991). Isotopic changes during snow
metamorphism. Stable Isotope Geochemistry:  A Tribute to Samuel Epstein.
H. P. Taylor, Jr., J. R. O'Neill and I. R. Kaplan, The Geochemical
Society. Special Publication No. 3: 211-221.
Sommerfeld, R. A., C. Judy, et al. (1991). Isotopic changes during the
formation of depth hoar in experimental snowpacks. Stable Isotope
Geochemistry:  A Tribute to Samuel Epstein. H. P. Taylor, Jr. and J. R.
O'Neill, The Geochemical Society. Special Publication No. 3: 205-209.
Stichler, W. (1987). Snowcover and snowmelt processes studied by means
of environmental isotopes. Seasonal Snowcover:  Physics, Chemistry,
Hydroogy. H. G. Jones and W. J. Orville-Thomas, D. Reidel Publishing
Company: 673-726.
Whillans, I. M. and P. M. Grootes (1985). "Isotopic diffusion in cold
snow and firn." Journal of Geophysical Research 90(D2): 3910-3918.


Julie K. Sueker, Ph.D.
Hydrologist
Exponent Environmental Group
4940 Pearl East Circle, Suite 300
Boulder, CO  80301
phone: (303) 444-7270
fax:  (303) 444-7528
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