GCBM implementation in Belize, initially with a focus on DOM modelling.
This project is based on the Standalone Template for the GCBM, downloaded from https://carbon.nfis.org/cbm
Disclaimer: The calculations performed in this repository are not official and do not represent the Government of Belize in any way.
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Clone the repository
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Download the installation tools from releases: install_tools, and unzip them into Standalone_GCBM/tools folder.
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Follow the installation instructions, located in Standalone_GCBM/readme.txt
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Modify the Standalone_GCBM/run_all.bat file to activate or deactivate the custom parameter modifications (explained below), as default, all custom configurations are enabled
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Execute the run_all.bat
This codebase was tested using a Windows 10 system, the Standalone_GCBM/readme.txt file contains further explanation on the GCBM usage, and tutorials on the model can be found in the moja.global Youtube Channel
This implementation of the GCBM includes several parameter changes, that were included to adapt the model to Belize´s local conditions
the Standalone_GCBM/run_all.bat file includes all the steps that were taken to adapt the model:
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A custom Generic Tropical species in created (input_database\add_species_vol_to_bio.py) using a linear volume to biomass conversion factor and proportions of stem, bark, foliage and branches extracted from local literature.
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A custom set of root parameters (to convert from AGB to BGB) is applied (input_database\modify_root_parameters.py)
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A set of decay parameters that was compiled from the scientific literature (input_database\custom_parameters\decay parameters.py) and is used to mofify the default ones (input_database\modify_decay_parameters.py)
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A sensitive turnover parameter (tree mortality) was modified (input_database\modify_turnover_parameters.py)
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The disturbance regime of the spinup procedure was changed to "Generic mortality 40%" every 10 years to reflect the effect of Hurricanes in Belize (input_database\modify_spinup_parameters.py)
Steps 3, 4 and 5 can be enabled/disabled in the run_all.bat file to perform a sensitivity analysis on the DOM pools
Postprocessing codes using R are included in the Postprocessing folder for reference purposes.
If you are going to use this coded, we recommend to use Rstudio and open the Postprocessing/GCBM_Belize_Sensitivity.Rproj file, the renv package was used for library management, and a renv.lock file with the required packages is included
In order to perform sensitivity analysis, the Standalone_GCBM folder can be duplicated with another name (e.g. Standalone_GCBM_decaymod) and the run_all.bat can me modified and run. Then, the Postprocessing/Summarize_DOM_Stocks.R code has to be modified to generate graphs and tables with this new configuration (instructions in the code)
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