1. Department
of Biological Sciences, University of Alberta T6G 2E9, Edmonton, Alberta, Canada
2. Department of Civil & Environmental Engineering, University of Alberta T6G 1H9, Edmonton, Alberta, Canada
3. Department of Physics and of Earth & Atmospheric Sciences, University of Alberta T6G 2E1, Edmonton, Alberta, Canada
4. School
of Public Health, University of Alberta T6G 1C9, Edmonton, Alberta, Canada