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Ken Tape - MS degree in Geology - I am interested in how changes in climate manifest themselves in the surficial processes and distribution of vegetation over a landscape. In the late 1940s several thousand low-altitude oblique aerial photographs were taken covering all the major drainages in arctic Alaska. We have repeated 250 of those old photographs from helicopter and have concluded that the shrub cover has increased dramatically. I am also using NDVI derived from Landsat imagery to map the distribution of alder in arctic Alaska.