MEGAN components and versions
I. FORTRAN code for calculating emissions
1. Off-line code. The MEGAN FORTRAN codes available from this web site are primarily used to generate biogenic emission inputs for air quality models, such as CMAQ or CAMx, and to investigate biogenic emission model sensitivity to input parameters.
Publicly available versions of this code include the following:
- MEGAN3: A beta version was released for testing (and available from this website) from July 2017 to March 2018. The final version (MEGAN3.0) was released in March 2018. User guide, code, driving variables and a test case are available. Some issues (and fixes) associated with MEGAN3.0 have been identified. A new version (MEGAN3.1) is expected to be released in late summer 2019.
- MEGAN2.1: The MEGAN2.1 code was released in 2013. User guide, code, driving variables and a test case are available.
- MEGAN2.1 parallelized version: A description and performance benchmark is available. Contact email@example.com to request the code.
- An earlier version (MEGAN2.04) was released in 2007 and was archived on the UCAR Community Data Portal (http://cdp.ucar.edu/) which has since been retired.
2. On-line code. MEGAN has been integrated into chemistry and transport models (CTMs) and used to generate on-line emission estimates and simulate coupled interactions (e.g., weather influences biogenic emissions which influence weather). Each model has somewhat different versions of the MEGAN algorithms and different weather and landcover driving variables. As a result, the predicted emissions can differ considerably. The MEGAN code for each model can be obtained by acquiring the CTM code from the links below and can be run as part of the CTM simulation. An incomplete list of links to models that have incorporated some version of MEGAN includes:
II. Emission Factor Processor Python code