The Community Atmosphere Model with Chemistry (CAM-chem) is a component of the NCAR Community Earth System Model (CESM) and is used for simulations of global tropospheric and stratospheric atmospheric composition.  CAM-chem uses the MOZART chemical mechanism, with various choices of complexity for tropospheric and stratospheric chemistry.  The first version of CAM-chem is described in Lamarque et al. (2012), CAM-chem as used for CCMI and HTAP is described in Tilmes et al. (2016), CAM-chem in CESM1.2 is described in Tilmes et al. (2015).

CESM2, including CAM6-chem, has recently been released.  This version includes a significantly updated tropospheric chemistry mechanism (MOZART-T1) [Emmons et al., submitted to JAMES], along with a volatility basis set (VBS) parameterization for the formation of secondary organic aerosols (SOA) [Tilmes et al., 2019].  

More information on downloading and using CAM-chem is available from the CESM Chemistry Climate Working Group webpage. 

To assist new users with CAM-chem, we are developing a wiki page.

CESM Working Group meetings are held each year in the winter and at the CESM Annual Workshop in June:
Annual workshops
Winter Working Group meetings

Surface O3 (white) and NO2 (orange). NCAR CAM-chem animation by Siyuan Wang;
created using 6-hour outputs of NCAR CAM-chem half-degree run (data courtesy of Louisa Emmons).




ACOM | Atmospheric Chemistry Observations & Modeling