CMAQv5.4 Release Notes: Emissions Updates: Model of Emissions of Gases and Aerosols from Nature (MEGAN) Biogenic Emissions - fisidi/CMAQ GitHub Wiki
New Biogenic Emissions Option, The Model of Emissions of Gases and Aerosols from Nature (MEGAN)
Jeff Willison, U.S. Environmental Protection Agency
Type of update: Science Update
Release Version/Date: CMAQv5.4
Description:
MEGAN 3.2 is available in CMAQv5.4 as an additional option for inline biogenic emissions. Input files will be available for several domains at release, but users can download the MEGAN preprocessor to create their own (https://bai.ess.uci.edu/megan/data-and-code). Soil NO can be calculated using the Berkeley-Dalhousie Soil NOx Parameterization (BDSNP) or an implementation of Yinger and Levy (YL95) when MEGAN is enabled.
Users may enable MEGAN and BEIS emission streams simultaneously to select species from a given stream through the emission control file. This approach allows the use of BDSNP with BEIS, the use of BEIS-YL95 with MEGAN, etc. See Chapter 4 of the user guide for more information about required inputs, and Chapter 6 for more information about configuration options and recommendations.
References: Guenther, A., Jiang, X., Shah, T., Huang, L., Kemball-Cook, S., and Yarwood, G., Model of Emissions of Gases and Aerosol from Nature Version 3 (MEGAN3) for Estimating Biogenic Emissions: Air Pollution Modeling and its Application XXVI, edited by Mensink, C., Gong, W., and Hakami, A., pp. 187–190, Springer International Publishing, Cham, 2020.