Table 1 Statistical description of the LTPP climatic data
From: Classification of pavement climatic regions through unsupervised and supervised machine learnings
Variables | Definition | Max. | Min. | Ave. | Std. |
|---|---|---|---|---|---|
MEAN_ANN_TEMP_AVG | Average of daily mean air temperatures for a year (°C) | 25.9 | −4.1 | 13.3 | 4.7 |
MAX_ANN_TEMP_AVG | Average of daily maximum air temperatures for a year (°C) | 32.6 | 1.8 | 19.8 | 5.0 |
MIN_ANN_TEMP_AVG | Average of daily minimum air temperatures for a year (°C) | 22.1 | −10 | 6.9 | 4.7 |
MAX_ANN_TEMP | Absolute maximum air temperature for a year (°C) | 52.2 | 21.4 | 37.1 | 3.3 |
MIN_ANN_TEMP | Absolute minimum air temperature for year (°C) | 10.1 | − 69.1 | −16.8 | 9.3 |
DAYS_ABOVE_32_C_YR | Number of days when daily maximum air temperature was above 32.2 °C for a year | 197 | 0 | 44.4 | 40.4 |
DAYS_BELOW_0_C_YR | Number of days when daily minimum air temperature was below 0 °C for a year | 271 | 0 | 94.6 | 56.0 |
FREEZE_INDEX_YR | Sum of negative daily temperatures lower than 0 °C for a year | 3369 | 0 | 252.3 | 326.4 |
FREEZE_THAW_YR | Number of freeze–thaw cycles for year | 236 | 0 | 74.2 | 41.0 |
MAX_ANN_HUM_AVG | Average of daily maximum humidity for a year (%) | 100 | 0 | 84.7 | 14.5 |
MIN_ANN_HUM_AVG | Average of daily minimum humidity for a year (%) | 84 | 0 | 44.7 | 11.0 |
TOTAL_ANN_PRECIP | Total annual precipitation (mm) | 3658.1 | 0 | 909.8 | 431.6 |
INTENSE_PRECIP_DAYS_YR | Number of days precipitation was greater than 12.7 mm for a year | 84 | 0 | 21.4 | 12.1 |
WET_DAYS_YR | Number of days precipitation was greater than 0.25 mm for a year | 261 | 0 | 124.3 | 40.8 |
TOTAL_SNOWFALL_YR | Total snowfall for a year (mm) | 10,674 | 0 | 525.4 | 693.2 |
SNOW_COVERED_DAYS_YR | Number of days for which snow cover data were available for year | 184 | 0 | 1.6 | 11.3 |