Fig. 1: Precipitation patterns associated with the preceding IOD and ENSO.

Partial correlations of precipitation during the ensuing summer with the DMI of the preceding autumn after removing the linear relationship with Niño 3.4 of winter based on a station precipitation data, and b GPCP data during 1979–2021. c and d as in a and b, but with Niño 3.4 of winter after deducing the linear relationship with the DMI of the preceding autumn. Variance fraction of summer precipitation (%) accounted for by e and f the DMI in autumn and g, h Niño 3.4 in winter based on e, g station data, and f, h GPCP data. Dotted areas in a–d represent statistical significance at the 95% confidence level.