Ken Ferschweiler (CBI) used climate data from the PRISM group
(Chris Daly, Oregon State University) at 4kmx4km spatial grain across
the conterminous USA to generate a climatology or baseline. He then
created future climate change scenarios using statistical downscaling
and created anomalies from the Hadley CM3 General Circulation Model
(GCM) run through the A2 emission scenario (SRES - special report on
emission scenarios published in 2000).
To run the MAPSS model (Neilson 1995), average
monthly temperatures were calculated for the period 2045-2060. This
dataset shows the mean anomaly (difference) in the annual mean
temperature for that period with respect to the 1971-2000 baseline
period.