Table 1. Significant correlations (α < 0.05) between the Callitris columellaris ring-width chronology and monthly and seasonal total precipitation and average scPDSI (1910–2012) during the growing season of Callitris columellaris (ca. Dec–May) in semi-arid northwest Australia.
| Total Rainfall | Average PDSI | ||
|---|---|---|---|
| Monthly | December | 0.45 | 0.41 |
| January | 0.54 | 0.58 | |
| February | 0.41 | 0.62 | |
| March | 0.55 | 0.72 | |
| April | 0.39 | 0.72 | |
| May | 0.16 | 0.66 | |
| Seasonal | Summer (Dec-Feb) | 0.67 | 0.57 |
| Autumn (Mar-May) | 0.64 | 0.73 | |
| Growing Season | Dec-May | 0.81 | 0.68 |
Precipitation and scPDSI are the CRU version 3.22 0.5° gridded datasets area-averaged over the 5° study region (117–122°E, 21–26°S, Fig 1). All p-values associated with correlation (r) values are <0.0001 except where NS is shown. NS indicates non-significant correlation values (i.e., p > 0.05).