1. Meteorological Service of Canada, 4905 Dufferin Street, Downsview, Ontario M3H 5T4, Canada
2. 885 North Hubbard Road, Lowellville, OH 44436
3. Department of Chemistry, Chatham College, Woodland Road, Pittsburgh, PA 15232
4. Department of Chemistry, Environmental Chemistry, Umeå University, SE-901 87 Umeå, Sweden
5. Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
6. Department of Geography, University of Toronto, Toronto, Ontario M5S 3G3, Canada
7. Hawaii Department of Agriculture, 1428 South King Street, Honolulu, HI 96814