Model of Emissions of Gases and Aerosols from Nature

MEGAN

MEGAN Versions and Guides


MEGANv2.04 (released October 29, 2007)

User Guides:

  1. FORTRAN code User Guide: Describes how to download and run a FORTRAN code that generates biogenic emission estimates for CMAQ.
  2. Data Portal User Guide: Describes how to access the code and input data.
  3. This version has been incorporated into the WRF-Chem model.
    Landcover datasets that can be used as inputs for the FORTRAN code v2.04. include version 2.0 and version 2.1
    • Leaf Area Index version 2.0
    • Plant Functional Type version 2.1
    • Emission Factors version 2.1

 

MEGAN2.1

  1. MEGAN2.1 User Guide: Describes how to install and run a FORTRAN code that generates biogenic emission estimates for CMAQ or CAMx. Weather and landcover driving variables are also described.
  2. MEGAN2.1 code: MEGANv2.1 FORTRAN code.
  3. Input variables preprocessor tool: A tool that can be used to generate input files for MEGANv2.1. You will need download the files from 4, 5, and 6 and put all the files in "megan_inputdata" folder.
  4. North America Leaf Area Index (version 2011) input files: 30 arc-second 8-day average LAI input files for North America for years 2003 to 2011 based on NASA MODIS data. Files are in netcdf format with a file naming convention of lainaYYYYDDD.nc where YYYY is year and DDD is day of year.
  5. North America Plant Functional Type (version 2011) input files: 30 arc-second (aggregated from 30 m data) PFT (CLM 16 PFT classification system) input file for year 2008. Files are in netcdf format with a file naming convention of pftNNdddYY.nc where NN is CLM PFT number, ddd is description and YY is year (08 for 2008).
  6. Global emission factor input files (version 2011): Emission factor input files. Files are in netcdf format with a file naming convention of cccc.nc where cccc is compound class. Note that this file is optional- the alternative is to have MEGAN generate emission factors from PFTs.
  7. MEGAN2.1 test case: MEGANv2.1 input and output data for U.S. test case to see if you are able to run MEGAN2.1 correctly.
  8. There are newly developed global MODIS LAI data that can be used in MEGAN2.1. Details will be provided later.
  9. The online version of MEGANv2.1 has been incorporated into the Community Land Model (CLM) of the Community Earth System Model (CESM).
  10. CLM/MEGANv2.1 output files for 2000-2010 can be downloaded here. The model was driven by 0.5-degree CRU-NCEP reanalysis data.
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