Up to this point we have been addressing  mostly short-term objectives concerning the incorporation of fundamental processes into chemical transport models.  Many additional processes have not been fully addressed, because we, as a community, are simply not sure how to incorporate them into our models, or because we are not sure of their importance. In this discussion I would like to focus on these processes.

The community needs to determine the importance of these processes and how to implement them in chemistry transport models.  I will begin a  discussion on the following topics:

1. subgrid scale chemistry: including emission plume modeling, and  the parameterization of reactive turbulent mixing (e.g., in the boundary layer);

2. aqueous and aerosol chemistry, and methods to incorporate these processes more accurately;

3. pollutant forecasting, and what is needed to obtain useful forecasts;

4. data assimilation, and its possible use in chemical forecast modeling;

5. chemical boundary and initial conditions and how to effectively implement them;
6. the use of adjoint methods;

7. how to evaluate models with data;

8. the use of mesoscale models in evaluating chemistry-climate interactions on the regional scale (e.g., over China).