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Current climate-related research includes both basic research on climate change and impacts of climate change. With colleagues Arritt and Gutowski, I am co-PI on the North American Regional Climate Change Assessment Program. Research on climate-change impacts includes assessing the interactive roles of climate and land-manager choices on land-use/land-cover change in agricultural area, development and evaluation of downscaling tools for near-surface flow and impacts of climate change on wind power, evaluating effects of climate changes on Midwest agroecosystems using a climate-crop coupled model, and assessment of variability and trends in Iowa climate data on pavement performance by use of a mechanistic-empirical...
Research emphasis focuses on the design and function of riparian management systems that reduce the movement and remediate the impact of non-point source pollutants from croplands and pastures to adjacent streams. Presently we are also studying the impact of riparian buffers on stream bank stability and quantifying the proportion of stream sediment that originates from bank erosion and surface erosion. We are also studying carbon sequestration in and evolution of greenhouse gases from buffers and other communities. Most of our buffer designs use perennial woody and forb species that are functionally effective and provide potential alternative income to land owners. An area of study includes quantifying the biomass...
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