Table 1. Monthly precipitation and mean temperatures during the course of experiment in polluted and reference site.

Year	Month	Precipitation (mm)		Temperature (°C)
		Site type:
		polluted	reference	polluted	reference
2010	1	43.4	40.3	−6.2	−6.6
	2	28.0	25.2	−1.3	−1.5
	3	31.0	31.0	3.8	3.5
	4	45.0	39.0	8.9	8.8
	5	232.5	217.0	12.8	12.6
	6	66.0	60.0	17.0	16.8
	7	108.5	108.5	20.4	20.3
	8	102.3	102.3	18.6	18.6
	9	99.0	87.0	12.5	12.4
	10	6.2	6.8	6.3	6.2
	11	69.0	72.0	6.5	6.2
	12	49.6	46.5	−5.2	−5.5
2011	1	28.2	27.9	−0.6	−0.6
	2	12.0	11.2	−2.2	−2.5
	3	37.5	31.0	4.1	4.0
	4	24.3	21.0	10.7	10.7
	5	72.5	62.0	13.6	13.6
	6	51.3	54.0	18.3	18.1