Numerical Studies on Forecast Error Correction of GRAPES Model with Variational Approach

Table 4

Distribution of ratios of RMSE of corrected 24 h forecast of geopotential height on 500 hPa to the forecast of GRAPES model.

Correction process	0.4–0.5	0.5–0.6	0.6–0.7	0.7–0.8	0.8–0.9	0.9–1.0	>1.0
Systematic error	0	1	26	67	57	20	15
Nonsystematic error of DEM	0	9	32	67	49	23	6
Nonsystematic error	2	12	35	84	38	8	7