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
  1. Here, the numbers correspond to the number of calculated variables (Data Citation 1), the ‘−’ indicates that no variables were created for the given metric.