These files contain the climate-dissimilarity results reported in Williams et al. 2007, PNAS.
The zip file includes downscaled CCSM3 paleoclimate simulations for North America for every 1000 years from 21,000 years ago to the present. They represent the paleoclimate simulations used in the references below.
References
Veloz, S.D., Williams, J.W., Blois, J.L., He, F., otto-Bliesner, B. and Liu, Z. (2012), No-analog climates and shifting realized niches during the late quaternary: implications for 21st-century predictions by species distribution models. Glob Change Biol, 18: 1698-1713. doi:10.1111/j.1365-2486.2011.02635.x
Blois, J.L., Williams, J.W., Fitzpatrick, M.C., Ferrier, S., Veloz, S.D., He, F., Liz, Z., manion, G. and otto-Bliesner, B. (2013), Modeling the climatic drivers of spatial patterns in vegetation composition since the Last Glacial Maximum. Ecography, 36:460-473. doi: 10.1111/j.1600-0587.2012.07852.x
Contact: Jack Williams, jww@geography.wisc.edu