Research Interests

I am an ecologist at the University of Alaska Fairbanks with broad interests in the Arctic natural sciences. Our research
describes the impacts of climate warming during the 20th century on various components of the Arctic ecosystem, including the snow, vegetation, permafrost, hydrology, wildlife, and people. My interests lie more in the linkages between these components than in any isolated component. Recently we used satellite images to show that beavers are moving from the forest and colonizing tundra regions, so we are studying the profound implications for Arctic stream and riparian ecosystems, including permafrost and fish. In 2020 I founded the Arctic Beaver Observation Network to integrate circumarctic efforts to understand this complex and exciting issue (contact me if you'd like to join).

I have used repeat photography to document landscape change in northern Alaska, which appears in my book (The Changing Arctic Landscape) and traveling museum exhibit (Then & Now, The Changing Arctic Landscape), which traveled nationally 2010-2020. I teach a course called Climate Variability and Northern Ecosystems, as well as Snow in the Environment. I enjoy boating, skiing, snowmachining, dog-mushing, photographing, studying, and writing about the Arctic environment.

For more about my research interests, please peruse my Google Scholar list of publications or my active projects.

Recent Press:

National Geographic Magazine (Sep 2019): Graphic designers worked with us to represent a host of changes occurring in the tundra.