Hi, I am currently running CMAQv5.4.0.1/HDDM with the chemistry mechanism cb6r5_ae7_aq. My objective is to calculate the sensitivity of VOCs to O3 (ozone). The VOCs included in my analysis are: AACD, ALD2, FORM, MEOH, FACD, ALDX, ETHA, ETOH, KET, PAR, ACET, PRPA, ETHY, ETH, OLE, IOLE, ISOP, APIN, …

That list is for use in CMAQ ISAM for a specific chemical mechanism. The list was populated manually mainly taking into account ozone production considerations. CO was added because it was important for this purpose. I honestly don’t remember why the others were omitted, and it could be a mistake. …

Hi FengLiu, The importance of individual VOCs is something that you will need to decided on your own in probably depends on your application and goals. But to clarify, do you plan to calculate sensitivity of VOCs to O3 or the sensitivity of O3 to VOCs? Both are possible, but there are normally no…

Hi Sergey, I intend to calculate the sensitivity of O3 to total VOCs which should be listed in sensinput.dat. In order to proceed with my CMAQ/DDM3D run using the cb6r5_ae7_aq chemistry mechanism, I have reviewed all 27 VOC species listed in CMAQv5.4/CCTM/node/BLD_CCTM_v54_DDM3D_pgi/SA_DEFN.F, as m…

Hi Sergey, Thank you for your response. I appreciate it. You are correct that the species of volatile organic compound (VOC) components depend on specific chemical mechanisms. Carbon monoxide (CO) is considered an ozone precursor, but it is not classified as a VOC species. Similarly, ethane (ECH4) …

Honourable Professor. Hello, I would like to ask a question, I am currently using CMAQ5.4 version, but I have to input the emission list is CB05, because CMAQ5.4 inside the CB6 mechanism does not have XYL but only XYLMN, and now it is currently the state of the report error, I would like to ask for…

Hello, professor, I would like to ask you a question. At present, I process the file after DDM, which is CCTM_SENDDEP_v54_intel_d01_20170202.nc, and the processing result is shown in the file. I find that it only shows the level level is 0 and the contribution of NMVOC to FORM for each grid. Does it…

I am not sure I understand your question completely and I don’t know how to interpret the numbers in the spreadsheet you posted without further context, but here are a few thoughts: If you would like to look at the sensitivity of FORM mixing ratios towards NMVOC emissions, you should look at the r…

Dear Professor, at present, I have invoked DDM calculation to generate two files, whose names are CCTM_ASENS_v54_intel_d01_20170226.nc and CCTM_SENDDEP_v54_intel_d01_20170227.nc, respectively. Because I want to obtain the unit contribution concentration of source concentration to receptor emission, …

I am not sure how else to explain it, so I’ll essentially repeat my answer from above: I’m guessing you’re interested in sensitivities of pollutant concentrations (not deposition fluxes) to the specified sensitivity parameters based on the paper you posted ( ACP - A new inverse modeling approach for…

Total VOC from CB6

CMAQ-DDM-3D

hogrefe.christian September 26, 2024, 12:22pm 7

Please see my response to your question in the other thread on how to use the DESID module to map your CB05 XYL emissions to the CB6 XYLMN and NAPH model species.

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Total VOC from CB6

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