Sensitivity Evaluation of Spectral Nudging Schemes in Historical Dynamical Downscaling for South Asia

Table 3

(a) Comparison of the root-mean-square error (RMSE) and spatial correlation (SCORR) of SSBC_Def and SSBC_New, compared with TRMM_3B43V7 monthly surface precipitation data (mm d⁻¹) for June-July-August (JJA), 2005 (the bold parts represent the best correlation and least error)

Domain	SSBC_Def		SSBC_New
	RMSE	SCORR	RMSE	SCORR
CORDEX-SA	3.730	0.630	3.170	0.740
SA	4.690	0.530	4.210	0.640
MN	5.210	0.810	7.610	0.650
EIO	8.010	−0.100	3.970	0.320
WG	7.360	0.700	5.790	0.820

(b) The same as (a) but with CMAP observations for JJA, 2005

Domain	SSBC_Def		SSBC_New
	RMSE	SCORR	RMSE	SCORR
CORDEX-SA	3.890	0.573	3.191	0.719
SA	5.005	0.415	4.266	0.580
MN	11.638	0.213	13.128	0.134
EIO	7.832	−0.099	3.782	0.421
WG	7.174	0.887	5.345	0.855