Variation of Main Phenophases in Phenological Calendar in East China and Their Response to Climate Change

Table 4

Parameters of regression for phenological trends.

Season	Station	1987–1996			2003–2012
		Slope (days/year)			Slope (days/year)
Spring	Shanghai	−0.04	0.01	0.97	0.67	0.09	0.46
	Nanjing	−1.02	0.08	0.46	1.88	0.65	0.05
	Hefei	0.54	0.04	0.59	2.98	0.46	0.05
Summer	Shanghai	0.45	0.14	0.32	0.40	0.11	0.35
	Nanjing	−0.99	0.20	0.23	0.48	0.20	0.26
	Hefei	−0.66	0.28	0.11	0.69	0.12	0.34
Autumn	Shanghai	−1.17	0.16	0.50	2.19	0.54	0.02
	Nanjing	−1.56	0.10	0.41	1.06	0.11	0.39
	Hefei	−2.96	0.22	0.29	−0.21	0.02	0.07
Winter	Shanghai	−0.54	0.04	0.56	1.70	0.65	0.01
	Nanjing	1.32	0.15	0.35	1.85	0.44	0.07
	Hefei	−1.82	0.16	0.25	0.21	0.01	0.88