Fig. 9: ACC for 500-hPa geopotential height prediction.

Time series of the ACC of the regional mean (relative to 20°N–50°N, 105°E–140°E) geopotential height zonal eddies at 500 hPa for a 2022, b 1995 and c 1983. The black dashed line denotes a skill of 0.6, and the red dashed line denotes the day of the 14th day of prediction.