1. U.S. Geological Survey National Research Program Denver Federal Center MS413 Denver Colorado 80225 USA
2. National Research Program U.S. Geological Survey 3215 Marine Street Boulder Colorado 80303 USA
3. School of Environmental and Forest Sciences and Civil & Environmental Engineering University of Washington – Seattle Box 325100 Seattle Washington 98195 USA
4. U.S. Geological Survey Colorado Water Science Center Denver Federal Center MS415 Denver Colorado 80225 USA
5. U.S. Geological Survey Alaska Science Center 4210 University Drive Anchorage Alaska 99508 USA
6. Tree Ring Lab Lamont‐Doherty Earth Observatory 61 Route 9W ‐ PO Box 1000 Palisades New York 10964 USA
7. Institute of Arctic Biology University of Alaska – Fairbanks 902 Koyukuk Drive Fairbanks Alaska 99775 USA