I am an ecosystem ecologist and member of the Environmental Studies Program faculty interested in how rapid environmental change affects ecosystems and society. My emphasis is on understanding how climate change alters vegetation and soil and the ecological services they provide. My current research examines carbon and nitrogen cycling in the polar deserts of Antarctica and in the tundra of western Greenland. I am also interested in the relationships between the disciplines of ecology, ecosystem science, and environmental law. I am active in Arctic policy and global environmental issues as past director of Dartmouth's Institute of Arctic Studies, Dickey Center for International Understanding, and as co-director of the University of the Arctic Institute for Arctic Policy. As one of two distinguished lead scholars for the U.S. Department of State Fulbright Arctic Initiative I was priviledged to bring together thematic teams of researchers from the eight Arctic nations to focus on issues of community resilience and sustainability under rapid social, political, and environmental change.