MEGAN3.2

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  

1. Landcover

• Leaf Area Index of vegetation covered surfaces:  LAIdata 

• Growth form and ecotypes: GFecotypedata

2. Soil nitrogen emission module inputs

• Soil NO model inputs (Global)

3. Physical weather

These data are typically generated by the user using a regional or global model such as WRF or CESM-CAM although it is possible to take other weather/climate data and convert it to the WRF format.

Emission Factor Processor (Python code)

• MEGAN3.21 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.

Download the Preprocessor code 

Download the calculator and mechanism mapper code