Table 2 Descriptive statistics for environmental variables in northern China from January 2006 to December 2018
Environmental variables | Mean | Min | Max | Percentiles | ||
|---|---|---|---|---|---|---|
25 | 50 | 75 | ||||
Monthly precipitation (mm) | 48.72 | 0.00 | 486.40 | 7.90 | 27.69 | 70.56 |
Monthly average temperature (℃) | 9.97 | -23.21 | 31.96 | 1.00 | 11.43 | 20.52 |
Monthly relative humidity (%) | 60.09 | 27.43 | 86.30 | 51.03 | 60.60 | 69.37 |
Monthly wind speed(m/s) | 2.34 | 1.06 | 4.04 | 2.00 | 2.30 | 2.63 |
Monthly total sun hours (h) | 197.91 | 32.90 | 325.45 | 166.39 | 198.59 | 231.15 |
Monthly normalized vegetation index (%) | 36.11 | 2.90 | 83.90 | 20.00 | 31.85 | 50.03 |