Queen's University, Distinguished University Professor

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

Professor, Department of Geoscience, University of Wisconsin-Madison

Large Lakes Observatory and Department of Earth & Environmental Sciences, Univ. of …

Professor emeritus, University of Geneva

INRS Eau Terre Environnement

University of Manitoba

University of Innsbruck

University of Greifswald

Universität Bremen - Geopolar