1. Geophysical Institute, University of Alaska, Fairbanks, Alaska 99775-7320, U.S.A.
2. Department of Forest Sciences, University of Alaska, Fairbanks, Alaska 99775-6780, U.S.A.
3. Golder Associates, Inc. 1750 Abbott Road, Anchorage, Alaska 99507, U.S.A.
4. ABR, Inc., PO Box 80410, Fairbanks, Alaska 99708, U.S.A.
5. US Army Cold Regions Research and Engineering Lab., 72 Lyme Road, Hanover, New Hampshire 03755, U.S.A.
6. Dept. of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, California 93106, U.S.A.
7. Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska 99775, U.S.A.