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)

2. Glacier shapefile (.shp)

• with associated files

3. 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.