Community Model (WRF-Chem)
The Weather Research and Forecasting (WRF) model is a community mesoscale meteorological model being developed collaboratively among several agencies. WRF-Chem, the modeling component of the Aerosol Modeling Testbed, simulates trace gases and particulates simultaneously with the meteorological fields. Since WRF employs domain nesting, chemistry and aerosol treatments can be evaluated over multiple spatial scales (local, regional, synoptic) relevant for chemical evolution.
This model was selected because 1) the on-line coupling of meteorology, chemistry, and aerosols permits the representation of aerosol direct and indirect radiative forcing and 2) there are already a large number of users and developers in the atmospheric science community.
Modularity and interoperability in the Aerosol Modeling Testbed are a key issue since it enables various treatments of specific aerosol processes to be systematically compared, while all other atmospheric processes remain the same. The isolation of aerosol processes provides a better means of assessing the performance of specific aerosol treatments than traditional model inter-comparisons studies.
Code maintenance is required to manage and document the changes made to WRF-Chem.