Simulated Change in Warm Spell Duration Index, CLIMDEX
Simulated change in warm spell duration index (WSDI) 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. Note: values for
Hawai‘i lie off the scale, with multi-model means ranging from 184.4 days for the RCP2.6 scenario, to 271.3
days for RCP8.5.