Spatiotemporal variability and trends of rainfall and its association with Pacific Ocean Sea surface temperature in West Harerge Zone, Eastern Ethiopia

Table 3 Mean monthly, seasonal, and annual time scale statistical analysis of rainfall for the meteorological station and CHIRPS rainfall data

Monthly Time Scale	Asebe Teferi	Asebot	Bedessa	Gelemso	Hirna	Kora	Meiso
R	0.98	0.91	0.99	0.98	0.99	0.98	0.98
NSE	0.93	0.82	0.92	0.96	0.98	0.87	0.96
MAE	9.13	14.18	13.26	7.52	6.61	11.70	5.90
MBE	3.11	− 5.31	− 11.36	2.87	− 2.54	10.07	− 1.18
RMSE	12	20	17	12	10	15	8
Bega (October–January)
R	0.87	0.90	0.77	0.84	0.95	0.45	0.80
NSE	0.73	0.75	0.57	0.54	0.87	0.21	0.60
MAE	10.37	8.14	13.23	9.07	5.15	9.33	10.16
MBE	3.04	− 1.26	− 4.34	6.12	0.53	0.17	− 1.55
RMSE	13	13	17	11	6	14	15
Belg (February–May)
R	0.68	0.77	0.89	0.83	0.84	0.72	0.84
NSE	0.45	0.55	0.74	0.68	0.69	0.26	0.68
MAE	19.10	19.31	13.49	15.74	15.68	16.28	14.37
MBE	− 2.87	− 5.39	− 5.21	− 1	− 0.53	16.28	2.18
RMSE	24	25	20	20	19	28	20
Kiremt (June–September)
R	0.63	0.26	0.61	0.88	0.33	0.37	0.53
NSE	0.31	0.02	0.08	0.727	0.04	0.07	0.25
MAE	22.25	27.63	31.91	10.38	26.80	44.05	17.37
MBE	− 9.5	− 9.27	− 24.53	3.50	− 7.62	13.75	− 2.20
RMSE	29	35	36	12	38	53	22
Annual Time Scale
R	0.56	0.37	0.68	0.81	0.395	0.568	0.689
NSE	0.29	0.021	0.035	0.594	0.017	0.092	0.46
MAE	14.74	15.747	13.16	6.202	9.601	18.855	8.689
MBE	− 3.112	− 5.308	− 11.36	2.87	− 2.539	10.066	− 1.18
RMSE	17	19	17	8	13	21	11