- Working Groups
The goal of the Chemistry-Climate WG is to continue the development of the representation of chemical gas and aerosol species in the CESM and to further our understanding of the interactions between chemistry/aerosol and climate. Scientific motivations include advancing knowledge on past, present and future atmospheric composition, interactions between atmospheric composition and the Earth System, stratosphere-troposphere coupling, aerosol direct and indirect effects on the Earth's energy balance, aerosol effects on precipitation, and impacts of global chemistry/aerosol and climate on air quality.
The chemistry and aerosol are now fully incorporated into the CESM, e.g. Options for super-fast chemistry, full troposphere chemistry, bulk aerosol, and modal aerosol that fully interact with the clouds and radiation. CAM was used extensively to perform 1850-2100 (all RCPs) simulations to define atmospheric composition (and deposition fields) for use in CCSM4. CAM can also be run as an offline version using GEOS5 and MERRA data to support aircraft campaigns and other observations and with stratospheric chemistry.
Testing the representation of chemistry and aerosols in CESM and evaluating existing and forthcoming CAM configurations, see Development Plans. These configurations include: