USDA, Forest Service, Forest Inventory and Analysis, Rocky Mountain Research Station, 507 25th Street, Ogden, UT 84401, United States Department of Geography, 690 SWKT, Brigham Young University, Provo, UT 84602, United States Plant, Soil, and Climate Department, 4820 Old Main Hill, Utah State University, Logan, UT 84322-4820, United States d Tree Ring Lab, Room 108, Lamont-Doherty Earth Observa...