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TopoSol model

Impacts of topographic shading on direct solar radiation for valley glaciers in complex topography

Link to publication

Requires

  1. Digital Elevation Model (DEM)
  • should be in lat/lon projection
  • input full DEM, larger than shapefile (for cast shadow effect)
  1. Glacier shapefile (.shp)
  • with associated files
  1. Define dates of interest and paths to data
  • located in Toposol_Main.R

Output

  • The result of tf.models (tf) is a 4-dimensional Rasterstack.
  • Each layer is an individual raster including all pixels located within the glacier shapefile.

Values show the average change in direct solar radiation for the given time period due to:

tf[[1]] = Slope and aspect

tf[[2]] = Cast shadows (component of topographic shading)

tf[[3]] = Shaded relief (component of topographic shading)

tf[[4]] = Combined (total impact of all topographic attributes)

if a save_path is defined, an ESRI compatible geotiff file will be saved within a new folder called TopoSol

Note: Values do not show totals in direct insolation, but a change based on different topographic features.


New model!

Impacts of topography, DEM resolution, and different DEM products

Link to new publication

  • Model code available under TopoRad repository

TopoRad is a model that includes all shortwave componenets: direct, diffuse, and reflected solar radiation. Code is available, but may need to be updated.