Dear All,

     I want to run RegCM4 with the DUST module enabled. Is there a tutorial about running RegCM4 with DUST ?  Can someone answer these questions.

If I want to run RegCM4 with DUST enabled, do I need to re-compile RegCM with chemistry options. Do I need emissions data (e.g., RETRO, POET, EDGAR, GFED) to run RegCM4 with dust enabled?  If I set chemsimtype = ’DUST ’ to enable 4-bin dust scheme or set chemsimtype='DUSS' to include 2 additional bins for sea salt. What is the difference in computation time between these two options? Is the DUSS option better than DUST?  Do I also need to set ichem = 1 (Use active aerosol chemical model) to use chemsimtype = ’DUST ’. 

Best Regards

Asma