Hello @Bailey ,
there is too little information in your post to provide a specific answer. As noted by my colleague @cgnolte in another thread where another user reported unexpectedly lower simulation results
What is different in your case compared to others who have used CMAQ to simulate air quality in China? Are you using the same emissions data successfully used by others, or is it a new dataset you have created? If so, how was it prepared? Are you using meteorological data that have been used previously, or is this a new dataset? If so, how was it prepared? … While there are other possibilities, the problem is usually emissions.
Your log file indicates that your input files contain some emitted species that are not being used, and that there are some expected emitted species that aren’t contained in your emission files. Not all of these mismatches would be impactful, but you would want to investigate them further.
CHECKING COMPATABILITY BETWEEN INTERNAL SPECIES LIST AND EMISSIONS INPUTS
The following tables list the chemical species present
on each emission file or from each online emission source.
This is the list of species in your input files:
Gas and Aerosol Gridded Area Emissions: 66 Species
AACD ACET ACYE ALK1
ALK2 ALK3 ALK4 ALK5
ARO1 ARO2 BACL BALD
BENZ CCHO CH4 CRES
ETHE FACD GLY HCHO
IPRD ISOP MACR MEK
MEOH MGLY MVK OLE1
OLE2 PACD PRD2 RCHO
RNO3 TERP SO2 SULF
NH3 CO PMC NO
NO2 HONO PEC POC
PAL PCA PCL PFE
PH2O PK PMG PMN
PMOTHR PNA PNCOM PNH4
PNO3 PSI PSO4 PTI
SESQ HCN CH3BR CH3CL
CH3I N2O
This is the list of emitted species expected by the CCTM
The following tables list the emission surrogate species
present in each namelist or in the aerosol data table.
GC Namelist: 63 Species
NO2 NO HONO CO
SO2 SULF HCHO MEOH
AACD PACD RNO3 ACET
CRES CCHO RCHO MEK
FACD PRD2 MGLY IPRD
GLY BACL BALD MACR
MVK ACRO ETHE PRPE
13BDE ISOP APIN ACYE
BENZ TOLU MXYL OXYL
PXYL B124 ETOH ALK1
ALK2 ALK3 ALK4 ALK5
SOAALK OLE1 OLE2 ARO1
ARO2MN NAPH TERP SESQ
CL2 HCL HCHO CCHO
ACRO POC POC POC
POC POC POCAeroData Table: 22 Species
PSO4 PNO3 PCL PNH4
PNA PMG PK PCA
PEC PFE PAL PSI
PTI PMN PH2O PMOTHR
PMC POC POC POC
POC POCNR Namelist: 1 Species
NH3
This is the list of expected species not present in your input file:
The following GAS emission surrogate species are
not present from any of the Area, Point, Biogenic,
Marine Gas, or Lightning emissions sources
ACRO PRPE 13BDE APIN TOLU
MXYL OXYL PXYL B124 ETOH
SOAALK ARO2MN NAPH CL2 HCL
ACRO
And this is the list of species in your input file not used by the model:
ATTENTION: The following emission species are available
from the inputs but are not used: 8 Species
ARO2 CH4 PNCOM HCN
CH3BR CH3CL CH3I N2O
The presence of PNCOM might be relevant, though I am not familiar with saprc07tc_ae6_aq to really judge its importance.