[1] Univ Manitoba, Dept Geog, CEOS, Winnipeg, MB, Canada
[2] Royal Mil Coll Canada, Kingston, ON, Canada
[3] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33149 USA
[4] Univ British Columbia, Dept Earth & Ocean Sci, Vancouver, BC V5Z 1M9, Canada
[5] Univ Laval, GIROQ, Quebec City, PQ, Canada