Figure-6.14: Annual Palmer Drought Severity Index for four selected Canadian locations, 1900–2007

Annual Palmer Drought Severity Index (PDSI) values from 1900 to 2007 for (a) Kamloops, British Columbia, (b) Saskatoon, Saskatchewan, (c) Sherbrooke, Quebec, and (d) Yarmouth, Nova Scotia. Solid lines represent 10-year running means. Positive values indicate wetter conditions, negative values indicate drier conditions.

Source

Bonsal et al. (2011).