Fig. 6: Trends in the concurrences of TC rainfall and drought terminations.

Numbers in the grids show the changing rate (% per year) of the number of drought termination (DT) events and those caused by high rainfall (TC-DT), and the proportion of the number of TC-DT events to the total DT events. The changing rate is derived from the Poisson regression of the number of TC-DT and DT events, and the proportion value of the number of TC-DT events to those of the DT events. Color filled grids show the changing rate is statistically significant, while the unfilled frames show that the changing rate in those grids are not statistically significant. Orange and blue colors show increases and decreases, respectively. Each column shows values derived from SPI of two-time scales (SPI-6 and SPI-12) using specific precipitation datasets (CMORPH, PERSIANN-CDR, and ERA5-Land) of specific time periods (1999–2021, 1985–2022, and 195–2022). Each row shows values for a variable (the number of TC-DT and DT events, and the proportion of the number of TC-DT to DT events as well) in the four hotspot regions shown in Figs. 3, 4, including the Arabian Peninsula and South Asia, the Southeast and East Asia, the east and west of North and Central America, and the northwest of Australia.