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Summary

CARBINE is a forest carbon accounting model developed by Forest Research to address questions about the carbon and greenhouse gas balances of forestry systems.

CARBINE is a region-scale forest carbon accounting model that works by aggregating stand-scale estimates. CARBINE can model carbon stocks for 19 different tree species at a range of growth rates and under a variety of management settings. The model outputs the carbon stocks in trees, roots, litter, deadwood, soil and harvested wood product pools.

CARBINE-R is the latest version of the model and is available on request.

Background on CARBINE

The CARBINE model has been in development since 1988 (Thompson & Matthews, 1989), having been first developed in response to the recognised importance of forests for carbon balances in the first meeting of the IPCC.

Since then, the model has undergone significant further development to answer a range of policy questions relating to carbon impacts of forests and harvested wood products in the UK and worldwide. CARBINE has been the model used by the UK for reporting GHG emissions and removals from forests and harvested wood products for the UK Greenhouse Gas Inventory from forests and harvested wood products since 2014.

Further Information on CARBINE.

What is CARBINE-R

CARBINE-R is the latest iteration of the model, where it has been re-written in the ‘R’ language to facilitate the model becoming openly accessible. CARBINE-R relies on two C++ models which have been adapted into R packages.

These models are M1R and ScotiaR:

  • M1R is a stand-level growth model which CARBINE-R uses to estimate stand volume growth and yield from harvest.
  • ScotiaR is a soil hydrology and carbon model, adapted from the ECOSSE model, capable of representing carbon stocks and changes for all major UK soil types.

How to access CARBINE-R

The CARBINE-R model has been made available by Forest Research free of charge.

Access to the model is granted by sending a request with a completed CARBINE Software Access Agreement to ghgi@forestresearch.gov.uk.

The agreement you will need to sign can be downloaded online.

Once we have reviewed your completed form, you will be sent a zipped copy of the RStudio project by file transfer.

How to install CARBINE-R

CARBINE-R runs on the open-source software known as ‘R’. We recommend running ‘R’ using an interface called ‘RStudio’. CARBINE-R is contained as an ‘RStudio project’. The project folder contains all required input files for a CARBINE-R run.

  • R can be installed from: https://cran.r-project.org (v4.4.2 or newer is required).
  • R tools is needed to install bespoke R packages integral to the running of CARBINE-R (M1R and ScotiaR). It is important to install the same version of R tools (i.e. v4.4) as the version of R (e.g. v4.4.2).
  • RStudio can be installed from: https://posit.co/download/rstudio-desktop/ (v2024.12.1+563 or later is recommended)

Further details can be found in the CARBINE-R User Guide and Technical Guide.

Current Applications

The primary aim of the release of the CARBINE-R is to support the transparency and resilience of its application to the UK Greenhouse Gas Inventory. The current functionality supports the ability to run:

  • Test cases: A number of test cases are supplied along with the CARBINE-R project. These can be used as dummy runs as well as ‘master’ files to compare the impact of any changes to carbine code or inputs.  
  • GHGI: The UK GHG inventory is set up to run for each broadleaf and conifer tree type within each nation. As running CARBINE for an entire nation’s forest can be lengthy, they are set up to be run independently so eight instances of CARBINE-R can be run simultaneously. This requires substantial computing power and memory to run in parallel. For this testing period, data for Northern Ireland is provided to demonstrate a GHG inventory run. Note that these take many hours to run.
  • User-defined runs: The user can define their own forest and management scenarios to investigate carbon stock change.

Further Development

Please get in touch to discuss further application, collaboration, and development of CARBINE-R.

Contact

For technical support and enquiries relating to CARBINE-R, please contact Forest Research at ghgi@forestresearch.gov.uk

Funding and partners

The upgrade and rewrite of CARBINE in R was funded by DESNZ through the DESNZ-FR Memorandum of Understanding Programme (2022-2025).