Table 1 Variables and their descriptions used for random forest models annual normalized burn ratio models. Variables are grouped by year-of-fire (i.e., factors that occurred between fire date and 12/31 of the fire year) and growing season (i.e., factors that occurred between April and October of the post-fire year being analyzed)
Variable | Source | Description |
|---|---|---|
Normalized burn ratio years 1, 2, 3, 4, 5 | Landsat + LandTrendr (30 m) | Normalized burn ratio for years 1 through 5 |
Year-of-fire effect variables | ||
 Soil erodibility (K-factor) | gSSURGO, processed in ArcMap | Unitless factor denoting a soils susceptibility to erosion and rate of runoff |
 Slope length factor (LS-factor) | DEM (National Map 10 m) | Unitless factor representing the ratio of soil loss per unit area to the loss from a 22.1-m long plot with a 9% slope |
 Precipitation total, fire date to end of year | Daymet (daily, 1000 m) | Sum of daily precipitation between fire date and end of year (mm) |
 Precipitation seasonality (coefficient of variability), fire date to end of year | Daymet (daily, 1000 m) | Coefficient of Variation of daily precipitation between fire date and end of year (mm) |
Growing season variables | ||
 Growing season VPD | Terraclimate (monthly, 4000 m) | Mean vapor pressure deficit, April through October, model year (kPa) |
 Growing season tmax | Terraclimate (monthly, 4000 m) | Mean temperature maximums, April through October, model year (C°) |
 Growing season PPT | Terraclimate (monthly, 4000 m) | Total monthly precipitation, April through October, model year (mm) |
 Growing season CWD | Terraclimate (monthly, 4000 m) | Mean climatic water deficit, April through October, model year (mm) |
Other | ||
 Month of fire | MTBS |  |