1. Alaska Geobotany Center Institute of Arctic Biology & Department of Biology and Wildlife University of Alaska Fairbanks Alaska 99709 USA
2. Arctic National Wildlife Refuge U.S. Fish and Wildlife Service Fairbanks Alaska 99701 USA
3. Alaska Ecoscience Fairbanks Alaska 99709 USA
4. Institute of Northern Engineering University of Alaska Fairbanks Fairbanks Alaska 99775 USA
5. University of Alaska Fairbanks Fairbanks Alaska 99775 USA
6. Woods Hole Research Center Falmouth Massachusetts 02540 USA
7. Fairbanks Fodar Fairbanks Alaska 99708 USA
8. Geophysical Institute University of Alaska Fairbanks Fairbanks Alaska 99775 USA