Add spatially heterogeneous soil colour maps for NoahMP #18
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This is the first commit to implement geographically variable soil colour initialisation in MONAN. First, the original Noah-MP table of albedo thresholds was replaced by the CLM-5, and the code was edited so the soil colour class is no longer hardcoded.
…and replaces the original classes in NoahMP (8 classes) with those defined in CLM-5 (20 classes). This has not been tested yet, so it is likely the first of a few commits until the new capability is fully functional.
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Hi @mpaiao, we will apply this PR to another branch (more up-to-date) which will be the new version of MONAN. So this PR is in the GCC Backlog. Thanks. We will keep you informed. |
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Pull Request Description
This pull request (1) replaces the original soil colour categories from NoahMP with those from CLM-5 and (2) implements the ability to initialise soil colours in NoahMP based on input maps. These changes addresses the issue that native NoahMP simulations have too little variation in reflectivity across sparsely vegetated regions known to have marked variation in albedo (e.g., Sahara, Namibian desert).
Most changes follow the steps to initialise soil texture in NoahMP, and were needed to ensure each grid cell sets the reflectivity parameter based on the input data. This pull request does not provide any data itself: users will need to generate the data themselves, and place the files (which share the same structure as soil texture data) into a path (
geog_sub_path) namedsoilcolour_30s. Scripts that read in CLM-5 data and translate them to NoahMP format are available at this git repository.Collaborators
@aomanzi @marcelopaivaramos @carlosrenatosouza2 @pkubota
Type of Change
Testing and Quality
Scientific Impact
This implementation should allow for better spatial representation of surface reflectivity at global scales. The results below show the differences in albedo (defined in the bulk form, i.e., ratio of average upwelling solar irradiance and downwelling solar irradiance, both integrated over a 48-hour period) between this pull request and the baseline version (feature/monan-631-GPU).