Model of Emissions of Gases and Aerosols from Nature (MEGAN)

MEGAN is a modeling system for estimating the net emission of gases and aerosols from terrestrial ecosystems into the atmosphere. It is driven by landcover, weather, and atmospheric chemical composition. MEGAN is a global model with a base resolution of ~ 1 km. It can run as a stand-alone model for generating emission inventories but is also being incorporated as an on-line component of chemistry/transport and earth system models.

Alex Guenther developed the initial versions of MEGAN while at NCAR/ACOM and now continues the development and support of MEGAN at University of California - Irvine.

The MEGAN algorithms have been incorporated into NCAR community models. MEGAN-v2.1 is embedded in the CESM Community Land Model, and so the biogenic emissions it calculates are available in CAM-chem.

An early version of MEGAN calculations of isoprene and monoterpenes emissions was incorporated in MOZART-4 and WRF-Chem.