Forest Phenology Dynamics and Its Responses to Meteorological Variations in Northeast China

Table 4

The correlation coefficients between climate and forest phenology (SOS) (2000–2009).

	SOS and temperature				SOS and precipitation
	I	II	III	IV	I	II	III	IV
Annual average	0.44	−0.09	−0.29	0.00	−0.23	−0.33	0.66	−0.03
Spring	−0.30	−0.70*	−0.69*	−0.70*	0.00	0.37	0.43	−0.24
Winter	−0.03	−0.24	−0.35	−0.66	−0.11	0.37	0.00	0.30
February	0.00	−0.35	−0.28	−0.64	0.43	0.25	0.08	0.00
March	0.20	−0.22	−0.58*	−0.80**	0.13	−0.15	0.00	−0.55*
April	−0.45	−0.73**	−0.35	−0.27	0.09	0.27	−0.16	0.03
May	−0.72**	−0.55	−0.45	−0.33	0.37	0.34	0.44	0.45

Note. Trends are significant with ^∗∗P < 0.01, ^∗P < 0.05.
I: cool-temperate needleleaf forest region; II: temperate steppe region; III: temperate needleleaf and broadleaf mixed forest region; IV: warm-temperate deciduous broadleaf forest region.