How to obtain the online emission of DMS in CCTM

CMAQ
1

Hello. I’m running CMAQ5.3 and trying to get the online emissions of DMS as an output file.
Is there any option in the runscript of CCTM to get it?
In the output files, I only see DMS as a concentration in the CCTM_ACONC file, but I need DMS emissions calculated.
Best

2

I don’t recall for certain and haven’t tried this myself, but I think in CMAQv5.3 you can enable the output of marine gaseous emissions by setting the run script variable MG_EMIS_DIAG to TRUE, as documented here.

In CMAQv5.4, you should be able to accomplish this by editing the Desid_Diag section of the DESID Control File to output emissions for stream MGEM.

2 Likes
3

Dear Christian. Thanks a lot for your quick reply. The issue was solved and now I can see the emissions.
Best regards

4

Dear Pinoc.
I have similar problem in output MG emissions in CMAQv5.3.2. My mechanism is cb6r3m_ae7_kmtbr, MG_EMIS_DIAG is set to True and CTM_MGEMDIAG is set to Yes in my run script.

I modeled the output file name setting after SSEMIS, but from Log files reply, it seems that my CCTM_MGEM file cannot be detected or created like CCTM_SSEMIS file. This results in my output files not containing CCTM_MGEM file. Where did I set it wrong or miss something?

I would be grateful if you or anyone else familiar with this setup could give me some advice.

Here are my run script and one of Log files.
run.csh (36.4 KB)
CTM_LOG_000.v532_mpi_pgi_test_20190621.txt (399.3 KB)

Liu
2024.6.14

5

Hi Liu,

Quick question: does the value of MECHNAME in RXNS_DATA_MODULE.F90 agree with the name of the gas-phase mechanism in your runscript? If not, this could be the issue.

Cheers,
Ben Murphy

1 Like
6

Hi Murphy,

Thanks for your advice, I found that the mechanism of my RXNS file and runscript is not consistent. Now the model can output what I want.

Best wishes!
Liu