1. a Research Branch, Agriculture and Agri-Food Canada , 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
2. b Geography Department, PO Box 450 , University of Ottawa , Ottawa, ON, K1N 6N5, Canada
3. c Department of Physics , University of Lethbridge , 4401 University Drive West, Lethbridge, AB, T1K 3M4, Canada
4. d Department of Geography and Environmental Studies , Carleton University , 1112 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada