Expert on climate variations (El Niño, tropical variations), climate change and climate change impacts in Wisconsin.
- Climate sciences, including climate variations and climate change
- El Nino / the Southern Oscillation (ENSO)
- Climate change impacts in Wisconsin, and the Wisconsin Initiative on Climate Change Impacts (WICCI)
- Member, Wisconsin Initiative on Climate Change Impacts (WICCI)
- Chair, WICCI Climate Working Group
- Member, WICCI Science Council.