Queen's University, Distinguished University Professor

Nanjing Institute of Geography & Limnology, Chinese Academy of Science

Professor Emeritus, Earth and Environmental Sciences, University of Michigan

Scientist, NIOZ

Director, Retired, St. Croix Watershed Research Station

Professor of Geological Sciences, University of Florida

University of Regina

University of Bern

Research Professor, Pyrenean Institute of Ecology, Spanish National Research Council

Professor of Geosciences, University of Arizona