CCWG | Chemistry Climate Working Group
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 schemes are now fully incorporated into the CESM, e.g. options for super-fast chemistry, full troposphere chemistry, troposphere and stratosphere chemistry, bulk aerosol, and modal aerosols that fully interact with the clouds and radiation. CAM-chem was used extensively to perform 1850-2100 (all RCPs) simulations to define atmospheric composition (and deposition fields) for use in CCSM4.
CAM-chem can also be run as an offline version (specified dynamics, SD) using GEOS5 and MERRA meteorological fields so as to simulate specific dates.
- Recent Publications including model results from CAM-Chem.
Topics of Development and Research
Testing the representation of chemistry and aerosols in CESM and evaluating existing and forthcoming CAM configurations, see Development Plans. These configurations include:
- CAM5 physics, especially the coupling of interactive gas-phase chemistry and the modal aerosols and the impact of the new planetary-boundary layer parameterization.
- Improved modeling capabilities for new chemistry to allow for better process understanding. Current applications include isoprene oxidation mechanisms and tropospheric halogen chemistry.
- Improved modeling capabilities for different dynamical cores and horizontal resolutions.
The announcements section of the forum contains guides of general use to CCWG users, including:
Detailed instruction on how to run CESM with chemistry can be found here: Community & User Support.
CCWG Liaison Information
CCWG Co-Chair Information
Dr. Xiaohong Liu
3/1/2016 - 2/28/2018
University of Wyoming, Department of Atmospheric Science, Dept. 3038 - 1000 E. University Ave., Laramie, WY 82071
Dr. Louisa Emmons
2/10/2014 - 12/31/2019
NCAR-ACD, P.O. Box 3000, Boulder, CO 80307-3000