Dear all,
I intend to downgrade my emission speciation from CB6AE7 to CB5AE5, and your help is greatly appreciated.
My emission species are as follows:
AACD ACET ACROLEIN ALD2 ALDX ALD2_PRIMARY APIN BENZ BUTADIENE13 CH4 CH4_INV CL2 CO CO2_INV ETH ETHA ETHY ETOH FACD FORM FORM_PRIMARY HCL HONO IOLE ISOP IVOC KET MEOH N2O_INV NAPH NH3 NH3_FERT NO NO2 NVOL OLE PAL PAR PCA PCL PEC PFE PH2O PK PMC PMG PMN PMOTHR PNA PNCOM PNH4 PNO3 POC PRPA PSI PSO4 PTI SO2 SOAALK SULF TERP TOL UNK UNR XYLMN
While the emission I need in CB5AE5 is as follows:
ALD2 ALDX APIN BPIN BENZENE CH4 CL2 CO ETH ETHA ETOH FORM HCL HONO IOLE ISOP MEOH NH3 NR NO NO2 NVOL OLE PAR PEC PMC PMFINE PNO3 POC PSO4 SESQ SO2 SULF TERP TOL UNK UNR XYL
I have been searching through the forum, speciation tool manual, and TSDs. I understand that differences include 3 steps, downgrading from CB6 to CB5, and downgrading from AE7 to AE6, and from AE6 to AE5.
For conversion from CB6 to CB5, as mentioned in ” UPDATES TO THE CARBON BOND MECHANISM FOR VERSION 6 (CB6)”, I see the difference is new explicit species for PRPA, ETHY, ACET, KET, and new definition for BENZEN. For the first four I do not worry because I am downgrading, and for the BENZEN, I am recalculating BENZ as PAR + 5 NR ( NR comes from PRPA and PAR in CB6 emission).
For the conversion from AE7 to AE6, as mentioned in Does old emission input data work with new version of CMAQ-5.3.1? – #2 by Havala.Pye , I will use naphthalene to calculate XYL needed in CB5. But I do not know how to consider splitting APIN from TERP (do I need to sum these two?)
I also have BPIN in my CB5AE5 emission which I do not know where to get it from (I need to have SESQ as well).
Do I need to add ALD2_PRIMARY and ALD2 to have downgraded ALD2, (Likewise for FORM, and CH4 and CH4_INV)
And for downgrading from AE6 to AE5, I notice that I miss many species, while I have to calculate PMFINE.
And after all, is there a 1 to 1 relation between the rest of the species? Thank you very much.
@Ben_Murphy @bbaek @Havala.Pye @hogrefe.christian @eyth.alison will you please help me with the process?
Thanks again.
