Data and Code
The latest version, MEGANv3.2, is illustrated in the above diagram
To run MEGAN3.2 you will need input data (landcover and environmental conditions) and code (preprocessor, emission factor processor, emission calculator and chemical mechanism mapper). Each of these are described below:
Geogridded input data (for the preprocessor Fortran code)
Use the preprocessor to regrid these data to your model domain
2. Soil nitrogen emission module inputs
Soil NO model inputs (Global)
3. Physical weather
Emission Factor Processor (Python code)
MEGAN3.2 Emission Factor Processor. This code integrates geogridded growth form and ecotype data (can be output from the FORTRAN preprocessor or generated using a GIS program or manually) with plant species composition and species-specific emission factor data to generate landscape average emission factors for a model domain. Download the Emission Factor Processor python code and input files.
Preprocessor, emission calculator and mechanism mapper (Fortran code)
Use the Preprocessor code to regrid input data to your domain, calculate biogenic emissions, and map the emissions to various chemical schemes.
MEGAN3 (Released in 2017) and MEGAN3.1 released in 2019. They have been replaced by version 3.2
MEGAN2.1: The MEGAN2.1 code was released in 2013. User guide, code, driving variables and a test case are still available.
MEGAN2.04 was released in 2007 on the UCAR Community Data Portal.