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).

CESM2.0, including CAM6-chem, has just been released.  This version includes a significantly updated tropospheric chemistry mechanism (MOZART-T1) [Emmons et al., in preparation for JAMES], along with a volatility basis set (VBS) parameterization for the formation of secondary organic aerosols (SOA).  

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.

Featured Research

CAM-chem with DART (Data Assimilation Research Testbed), assimilating MOPITT CO, has provided a number of insights on atmospheric composition: Gaubert et al., 2016Gaubert et al., GRL, 2017

CAM-chem is being used in the Hemispheric Transport of Air Pollutants (HTAP) studies.  Published works from this study include: Huang et al., ACP, 2017, etc...

CAM-chem is a participant in the Chemistry Climate Modeling Initiative (CCMI): e.g., Strode et al. (2016).

CAM-chem output for Regional Model Boundary Conditions

Output from a simulation of CAM-chem in CESM2.0 (Jan 2001-Jun 2017) is available to the community, with the goal of providing time-varying boundary conditions for regional models such as WRF-Chem.  Please see the CAM-chem wiki page for access instructions. 


Collected CAM-chem publications, and CAM-chem publications by UCAR authors at OpenSky.




ACOM | Atmospheric Chemistry Observations & Modeling