Table 1 Covariates used in generalized additive models (GAMs) to assess variation in post-fire fuels nine years after the Storrie Fire
Model covariate | Mean (min–max) or class (n) | Source |
|---|---|---|
Elevation (m) | 1440 (838–1989) | US Geological Survey (2013) |
Topographic position index | Canyon (21), flat slope (6), steep slope (117), ridge (58) | Derived from the digital elevation model using CorridorDesigner Toolbox (Majka et al. 2007) |
Slope steepness (%) | 51.1 (4.7–136.5) | Derived from the digital elevation model |
Solar radiation (WHm−2 × 105) | 13.1 (5.7–16.8) | Derived from the digital elevation model using the Solar Radiation Toolbox in ArcGIS 10.3 (ESRI 2014) |
Slope aspect (transformed) | 1.03 (0–2) | Derived from the digital elevation model, transformed as 1 + cos(45−A)(π ÷ 180), where A is the aspect in degrees |
Actual evapotranspiration | 385 (293–534) | The basin characterization model downscaled climate and hydrology datasets (Flint et al. 2013) |
Climatic water deficit | 582 (359–703) | The basin characterization model downscaled climate and hydrology datasets (Flint et al. 2013) |