Variables and Description

Unit

Significance of variables

Bio1 = Annual Mean Temperature

˚C

Reflecting the average temperature variability

Bio2 = Mean Daily Diurnal Range

˚C

Reflecting the temperature difference

Bio3 = Isothermality (Bio2/bi07) (×100)

%

Reflecting the temperature difference

Bio4 = Temperature Seasonality (standard deviation × 100)

˚C

Reflecting the average temperature variability

Bio5 = Maximum Temperature of Warmest Month

˚C

Reflecting extreme temperature effects

Bio6 = Minimum Temperature of the Coldest Month

˚C

Reflecting extreme temperature effects

Bio7 = Temperature Annual Range (bio5 - bio6)

˚C

Reflecting the temperature difference

Bio8 = Mean Temperature of Wettest Quarter

˚C

Reflect whether the water heat is synchronized

Bio9 = Mean Temperature of Driest Quarter

˚C

Reflect whether the water heat is synchronized

Bio10 = Mean Temperature of Warmest Quarter

˚C

Reflecting extreme temperature effects

Bio11 = Mean Temperature of Coldest Quarter

˚C

Reflecting extreme temperature effects

Bio12 = Annual Precipitation

mm

Reflecting the characteristics of water resources

Bio13 = Precipitation of Wettest Monthly

mm

Reacting extreme moisture conditions

Bio14 = Precipitation of Driest Monthly

mm

Reacting extreme moisture conditions

Bio15 = Precipitation Seasonality (Coefficient of variation)

%

Reflect precipitation and seasonal distribution

Bio16 = Precipitation of Wettest Quarter

mm

Reacting extreme moisture conditions

Bio17 = Precipitation of Driest Quarter

mm

Reacting extreme moisture conditions

Bio18 = Precipitation of Warmest Quarter

mm

Reflect whether the water heat is synchronized

Bio19 = Precipitation of Coldest Quarter

mm

Reflect whether the water heat is synchronized

Alt = Altitude

m

Reflecting altitude differences

Att0 = ≥0˚C Accumulated Temperature (≥0˚C∙d, ×10)

˚C

Reaction heat resource characteristics

Ai = Aridity Index (×1000)

-

Reaction climate dryness and humidity

Im = Humid Index (×100)

-

Reaction climate dryness and humidity