Dr. Sonnentag is Associate Professor and holds the Canada Research Chair in Atmospheric Biogeosciences in High Latitudes at the Université de Montréal. His research aims to understand changes in land surface-atmosphere interactions in response to increasing natural and anthropogenic pressures. Sonnentag has established a transect of towers for micrometeorological measurements (e.g., eddy covariance) along a 2000-km permafrost and climate gradient across the boreal forest of northwestern Canada. He also uses remote sensing and modelling techniques to study changes in Arctic-boreal ecosystem composition, structure, and function. In addition, Sonnentag leads a training network to build local Indigenous capacity in the Northwest Territories for community-based monitoring of ecosystem changes.