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Table 5

Statistics of calibration and verification test results

Calibration			Verification
Time span	R	R²	Time span	r	RE	CE	ST
1969–1989	0.71**	0.50	1990–2013	0.64**	0.40	0.41	16+/5−*
1990–2013	0.56*	0.31	1969–1989	0.71**	0.36	0.35	17+/5−*
1969–2013	0.62**	0.38

Calibration			Verification
Time span	R	R²	Time span	r	RE	CE	ST
1969–1989	0.71**	0.50	1990–2013	0.64**	0.40	0.41	16+/5−*
1990–2013	0.56*	0.31	1969–1989	0.71**	0.36	0.35	17+/5−*
1969–2013	0.62**	0.38

r, Pearson's correlation coefficient; R², explained variance; RE, reduction of error; CE, coefficient of efficiency; ST, sign test.

*Denotes significance at p(a) < 0.05.

**Denotes significance at p(a) < 0.01.