Analysis of vegetation distribution in Interior Alaska and sensitivity to climate change using a logistic regression approach

Greenhouse gases released by human activities are the dominant forcing in anomalously high latter twentieth century temperatures in the Northern Hemisphere, overriding a millennial-scale cooling trend due to astronomical forcing (Briffa et al., 1995; Mann et al., 1998). At northern high latitudes this results in winter and spring warming accompanied Institute of Arctic Biology, University of Alaska, Fairbanks, AK, USA, US Geological Survey, Alaska Cooperative Fish and Wildlife Research Unit, University of Alaska, Fairbanks, AK, USA, Department of Environmental Sciences, University of Virginia, Charlottesville, VA, USA and Department of Forest Sciences, University of Alaska, Fairbanks, AK, USA