Comprehensive Evaluation of GPM-IMERG, CMORPH, and TMPA Precipitation Products with Gauged Rainfall over Mainland China

Table 3

Statistical metrics for seasonal daily mean precipitation over the 8 subregions in China.

Index	Seasons	Type	XJ	TP	XB	YG	DB	HB	CJ	HN
R	Spring	R-IMERG V05B	0.77	0.9	0.96	0.85	0.82	0.938	0.96	0.938
		R-IMERGV04A	0.59	0.72	0.91	0.73	0.8	0.936	0.953	0.94
		TRMM 3B42	0.68	0.93	0.93	0.82	0.77	0.94	0.955	0.95
		CMORPH-CRT	0.1	0.74	0.81	0.61	0.48	0.87	0.92	0.9
	Summer	R-IMERG V05B	0.622	0.9	0.9	0.73	0.78	0.87	0.87	0.86
		R-IMERGV04A	0.41	0.68	0.9	0.66	0.77	0.9	0.88	0.84
		TRMM 3B42	0.62	0.95	0.93	0.78	0.79	0.88	0.88	0.87
		CMORPH-CRT	0.46	0.91	0.87	0.61	0.83	0.88	0.85	0.67
	Autumn	R-IMERG V05B	0.75	0.94	0.93	0.68	0.78	0.92	0.7	0.88
		R-IMERGV04A	0.567	0.8	0.91	0.64	0.8	0.92	0.71	0.87
		TRMM 3B42	0.57	0.96	0.94	0.71	0.68	0.92	0.66	0.85
		CMORPH-CRT	0.39	0.9	0.92	0.44	0.55	0.85	0.63	0.74
	Winter	R-IMERG V05B	0.69	0.78	0.5	0.77	0.86	0.94	0.95	0.78
		R-IMERGV04A	0.57	0.73	0.47	0.69	0.79	0.96	0.96	0.81
		TRMM 3B42	0.59	0.64	0.56	0.48	0.87	0.78	0.83	0.77
		CMORPH-CRT	−0.22	0.38	0.14	0.22	−0.16	0.51	0.55	0.31
RB (%)	Spring	R-IMERG V05B	−0.8	3.95	10.43	1.42	19.5	17	6.57	1.77
		R-IMERGV04A	−31.41	−69.78	−2.46	−3.67	15.73	16.18	5.7	2.37
		TRMM 3B42	−8.35	10.12	6.21	2.73	4.51	6.65	6.33	5.53
		CMORPH-CRT	62.96	9.24	8.44	−2.09	2.77	8.08	−0.47	−3.89
	Summer	R-IMERG V05B	3.72	3.62	10.55	6.65	14.17	9.03	4.68	−0.54
		R-IMERGV04A	−0.39	−33.99	8.33	6.06	15.69	9.42	3.63	−0.44
		TRMM 3B42	−3.28	4.17	6.43	4.59	11.47	8.64	2.14	2.19
		CMORPH-CRT	13.12	2.75	4.69	−0.32	6.37	3.25	1	−6.48
	Autumn	R-IMERG V05B	10.4	2.75	8.5	4.1	13.04	6.94	8.29	2.83
		R-IMERGV04A	−34.01	−52.7	0.85	1.44	7.47	4.95	7.04	2.38
		TRMM 3B42	−28.72	4.25	1.26	0.53	6.46	−0.66	3.36	0.13
		CMORPH-CRT	23.28	11	2.78	−0.37	−0.61	−2.07	1.58	−6.79
	Winter	R-IMERG V05B	13.5	−28.4	−28.86	−12.75	25.16	21.34	14.35	−1.89
		R-IMERGV04A	−77.79	−89.63	−72.46	−21.34	−17.15	3.36	10.31	2.33
		TRMM 3B42	31.67	10.78	7.72	−24.91	42.46	−11.64	−4.35	−8.38
		CMORPH-CRT	−34.64	79.89	19.06	16.5	−65.76	35.76	−2.94	−13.94
RMSE (mm/day)	Spring	R-IMERG V05B	0.31	0.26	0.16	0.59	0.35	0.36	0.63	0.908
		R-IMERGV04A	0.41	0.8	0.2	0.79	0.32	0.35	0.62	0.88
		TRMM 3B42	0.35	0.24	0.18	0.65	0.28	0.25	0.62	0.89
		CMORPH-CRT	1.34	0.49	0.29	0.97	0.45	0.35	0.72	1.13
	Summer	R-IMERG V05B	0.63	0.58	0.46	1.2	0.74	0.68	0.96	1.16
		R-IMERGV04A	0.73	1.37	0.45	1.35	0.79	0.633	0.91	1.19
		TRMM 3B42	0.62	0.49	0.38	1.1	0.7	0.7	0.93	1.09
		CMORPH-CRT	0.8	0.55	0.48	1.39	0.6	0.58	1.05	1.75
	Autumn	R-IMERG V05B	0.28	0.25	0.25	0.65	0.27	0.33	0.64	0.67
		R-IMERGV04A	0.36	0.81	0.26	0.7	0.22	0.32	0.62	0.69
		TRMM 3B42	0.35	0.22	0.22	0.63	0.28	0.31	0.63	0.74
		CMORPH-CRT	0.55	0.34	0.26	1.3	0.29	0.43	0.72	0.98
	Winter	R-IMERG V05B	0.19	0.07	0.08	0.28	0.14	0.13	0.33	0.42
		R-IMERGV04A	0.21	0.14	0.11	0.35	0.13	0.11	0.27	0.44
		TRMM 3B42	0.17	0.08	0.06	0.56	0.18	0.17	0.52	0.438
		CMORPH-CRT	0.28	0.18	0.12	2.02	0.36	0.39	1	0.89
RRMSE (%)	Spring	R-IMERG V05B	66.34	26.42	20.06	24.89	25.97	23.72	13.65	14.18
		R-IMERGV04A	88.06	79.86	24.36	33.29	23.79	23.51	13.5	13.77
		TRMM 3B42	75.21	23.74	22.68	27.55	21.4	16.76	13.52	13.95
		CMORPH-CRT	286.2	48.64	36.37	40.92	34.14	23.41	15.52	17.72
	Summer	R-IMERG V05B	65.22	19.2	22.27	20.31	20.75	18.21	14.8	14.65
		R-IMERGV04A	76.22	45.27	21.48	22.27	21.97	16.9	14	15.05
		TRMM 3B42	65.18	16.07	18.1	18.09	19.62	18.74	14.3	13.8
		CMORPH-CRT	82.99	18.01	23.03	22.93	16.67	15.51	16.22	22.11
	Autumn	R-IMERG V05B	58.57	19.36	20.43	21.05	21.81	15.03	18.09	15.5
		R-IMERGV04A	76.04	62.77	20.97	22.86	17.62	14.3	17.47	15.91
		TRMM 3B42	73.97	17.06	17.45	20.47	22.59	13.84	17.58	17.13
		CMORPH-CRT	115.8	26.59	20.86	42.14	23.06	19.24	20.2	22.84
	Winter	R-IMERG V05B	93.91	58.73	57.91	38.43	43.2	32.12	21.81	17.76
		R-IMERGV04A	111.2	115.7	86.18	48.23	39.77	27.04	17.89	18.58
		TRMM 3B42	91.39	64.61	47.22	77.27	53.99	40.92	34	18.45
		CMORPH-CRT	146.2	149.9	87.95	276.6	111	93.15	65.05	37.6