Simulated Change in Cold Spell Duration Index, CLIMDEX
Simulated change in cold spell duration index (CSDI) for each region and the contiguous United
States, for 2046–2065 with respect to the reference period of 1981–2000. The upper panel shows values for
the CLIMDEX SRES B1 (blue), A1B (green), and A2 (red) scenarios. The lower panel shows values for the
CLIMDEX RCP2.6 (dark teal), 4.5 (light teal), 6.0 (yellow), and 8.5 (dark red) scenarios. Bars indicate the
interquartile ranges of model values and circles depict the multi-model means.