Table 3. Simple linear regression coefficients of the monthly climatic variables over the time (1997–2008) in western Chongqing.

Month	T	RH	Rainfall	SD
January	0.4585	–0.4722	0.1430	0.4112
February	1.6264	–0.4861	1.3353	1.3497
March	3.1344**	–2.4113*	2.2005*	3.5753**
April	2.8649*	–2.5246*	1.0391	4.0579***
May	1.8619	–2.7487*	0.5696	2.7538*
June	0.2456	–0.0648	2.5497*	1.4173
July	–0.6162	–1.2621	–0.1114	–0.8580
August	–1.4706	–0.2045	–0.7345	–0.8212
September	–4.4359***	–0.0739	–3.7010***	–2.1121
October	–3.6409**	–0.2576	–2.6563*	–3.3652*
November	–1.2812	–0.0475	–2.4575*	–1.8904
December	–0.0778	–0.2924	–0.4476	–1.1672

T: average temperature; RH: relative humidity; SD: sunshine duration. *p≤0.05, **p≤0.01, ***p≤0.001.