Study on Microclimate Characteristics and Vertical Variation of Potential Evapotranspiration of the Robinia pseudoacacia Forest in the Loess Plateau of China

Table 2

Statistics of meteorological factors inside and outside the forest.

Month	Meteorological factor	Mean value		Maximum value		Minimum value
		Inside the forest	Outside the forest	Inside the forest	Outside the forest	Inside the forest	Outside the forest
4	Air temperature	12.7	12.0	19.7	19.4	3.1	4.9
	Relative humidity	57.5	48.0	99.0	59.5	21.9	38.1
	Wind speed	1.7	2.4	3.5	3.6	0.7	1.6
7	Air temperature	21.8	22.5	25.0	25.5	17.5	19.6
	Relative humidity	67.6	62.3	96.0	88.6	42.4	49.0
	Wind speed	1.1	1.7	1.5	2.5	0.8	1.1
10	Air temperature	10.9	10.9	15.5	17.0	2.9	4.4
	Relative humidity	65.2	64.6	93.6	90.7	32.3	51.9
	Wind speed	1.3	1.6	2.1	2.8	0.7	0.6
1	Air temperature	−5.8	−6.5	−2.2	−0.1	−13.8	−14.7
	Relative humidity	68.6	58.0	96.1	88.7	38.0	44.9
	Wind speed	1.1	1.5	2.1	2.4	0.4	0.0