Hi,
In the integrated process rate(IPR) analysis of Process Analysis module in CMAQv5.3.1, CHEM means “Chemistry”.
I used IPR to do the analysis for PM2.5, and it was defined in pa_cb6r3_ae7_aq.ctl as follows:
DEFINE FAMILY ATOTI = ASO4I+ANO3I+ANH4I+ANAI+ACLI+AECI+AOTHRI+ALVPO1I + ASVPO1I + ASVPO2I + APOCI +APNCOMI+ ALVOO1I + ALVOO2I + ASVOO1I + ASVOO2I;
DEFINE FAMILY ATOTJ = ASO4J+ANO3J+ANH4J+ANAJ+ACLJ+AECJ+AOTHRJ+AFEJ+ASIJ+ATIJ+ACAJ+AMGJ+AMNJ+AK+AALJ+ALVPO1J+ASVPO1J+ASVPO2J+APOCJ+ASVPO3J+AIVPO1J+APNCOMJ+AISO1J+ AISO2J + AISO3J +AMT1J + AMT2J + AMT3J+ AMT4J +AMT5J + AMT6J + AMTNO3J+AMTHYDJ + AGLYJ + ASQTJ+AORGCJ+ AOLGBJ + AOLGAJ +ALVOO1J + ALVOO2J + ASVOO1J + ASVOO2J+ASVOO3J + APCSOJ+ AAVB1J + AAVB2J+AAVB3J + AAVB4J;
DEFINE FAMILY ATOTK = ASOIL+ACORS+ASEACAT+ACLK+ASO4K+ANO3K+ANH4K;
IPR_OUTPUT ATOTI;
IPR_OUTPUT ATOTJ;
IPR_OUTPUT ATOTK;
The following results are included:
IPR_OUTPUT( 22) = ZADV of ATOTI
IPR_OUTPUT( 23) = HADV of ATOTI
IPR_OUTPUT( 24) = HDIF of ATOTI
IPR_OUTPUT( 25) = VDIF of ATOTI
IPR_OUTPUT( 26) = EMIS of ATOTI
IPR_OUTPUT( 27) = DDEP of ATOTI
IPR_OUTPUT( 28) = CLDS of ATOTI
IPR_OUTPUT( 29) = CHEM of ATOTI
IPR_OUTPUT( 30) = COND of ATOTI
IPR_OUTPUT( 31) = COAG of ATOTI
IPR_OUTPUT( 32) = GROW of ATOTI
IPR_OUTPUT( 33) = NPF of ATOTI
There exists CHEM for PM2.5 and not equal to zero.
The CHEM in the CMAQ model mainly represents the gas-phase chemical process. Here, what are the gas-phase chemical reactions that contribute to the PM2.5 formation? Or it includes the gas-particle heterogeneous reactions? And what are they?
Thanks!
C.W.Huang