Table 1 Overview of the variable categories, the source and names of the variables, the number of source layers in each category, the unit of measurement, the naming convention of the netCDF files (Data Citation 1), and the metrics calculated for each variable
From: Near-global freshwater-specific environmental variables for biodiversity analyses in 1 km resolution
Category | Source | Variable name | Number of source layers | Unit | Variable naming convention | Metric of upstream environment (number of layers) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Min | Max | Range | Average | Sum | Distance weighted average | Distance weighted sum | ||||||
Climate | WorldClim6 | Minimum monthly air temperature | 12 | [°C] *10 | monthly_tmin_*.nc | 12 | 12 | 12 | 12 | − | 12 | − |
Climate | WorldClim6 | Maximum monthly air temperature | 12 | [°C] *10 | monthly_tmax_*.nc | 12 | 12 | 12 | 12 | − | 12 | − |
Climate | WorldClim6 | Monthly sum of precipitation | 12 | [mm] | monthly_prec_*.nc | − | − | − | − | 12 | − | 12 |
Climate | WorldClim6 | Long-term hydroclimatic variables | 36 | [°C] *10 and [mm] | hydroclim_*.nc | − | − | − | 11 | 8 | 11 | 8 |
Topography | HydroSHEDS12 | Elevation | 1 | [m] | elevation.nc | 1 | 1 | 1 | 1 | − | − | − |
Topography | HydroSHEDS12 | Slope | 1 | [°] * 100 | slope.nc | 1 | 1 | 1 | 1 | − | − | − |
Topography | HydroSHEDS12 | Flow length (upstream cells) | 1 | count of grid cells | flow_acc.nc | − | − | − | − | 1 | − | − |
Topography | HydroSHEDS12 | Flow accumulation (watershed size) | 1 | count of grid cells | flow_acc.nc | − | − | − | − | 1 | − | − |
Land cover | Consensus land-cover8 | Land cover | 12 | Percent cover | landcover_*.nc | 12 | 12 | 12 | 12 | − | 12 | − |
Surface geology | USGS20 | Geological age | 92 | count of grid cells | geology_weighted_sum.nc | − | − | − | − | − | − | 92 |
Soil | ISRIC 21 | Soil type | 10 | %, cmol/kg, kg/m3, cm | soil_*.nc | 10 | 10 | 10 | 10 | − | 10 | − |
