PTEMARB.DAT species list and molecular weights?

[Lauri Myllyvirta]

Hi,

I'm trying to set up CALPUFF (v7.2.1) runs with hourly varying emissions. I have two questions:

-what should I specify as the molecular weight for particulate emissions (PM2.5, PM10 etc)?

-will the simulations use the species chemical and physical parameters specified in CALPUFF.INP, if the names match? (I'm confused by the fact that molecular weights are required in PTEMARB.DAT while they are not required in CALPUFF.INP, and it doesn't say anywhere that the pollutant lists in the two files must match).

Thank you for any help. best

Lauri Myllyvirta

[Lauri Myllyvirta]

I was able to resolve this; sharing here in case helpful for others:

-the list of emitted species in PTEMARB.DAT must match that in CALPUFF.INP

-the molecular weights have no effect on particle concentrations at least when CALPOST output units are ug/m3 - I ran two short test runs that were otherwise identical but with molecular weights set to 1 and 1000, and verified that the CALPOST outputs were identical.

[anel20...@gmail.com]

Thank you very much Lauri for share us your results!

regards,

A