Thank you very much for your reply. I read in this post that line 281 of sciproc.F is commented out. There are only 256 lines in sciproc.F of my BLD_CCTM_cb6mp_ae6_aq file. I am still a little confused about this call to comment out CHEM
To me, the plots you posted suggest that your emissions are not being read in by CMAQ at all and consequently your pollutant concentrations are driven by the lateral boundary conditions, transport, and deposition. The plot for CO is particularly telling, there are no urban hotspots and the largest concentrations are at the boundaries. You wrote that you successfully simulated January 2017 with the same emission inventory. How did you go about preparing emission files for your January 2020 simulation?
Thank you for your reply. I used the 2017 emission inventory and the meteorology in January 2020 as the driving force. A time change was made in the script to read the emissions file for 17 years and the meteorology file for 2020. This is my script setting. No error was reported when running. Please check if it is a problem of reading the emission file.Thanks again for your reply！run_cctm.csh (28.1 KB)
Could you please also post the log file when running with this configuration? And could you provide additional information on the time stamps in your emission file? Did you only change the file names from their original dates in 2017 to the dates you were running in 2020, or did you use a tool like m3tshift to make sure that the time stamps within the files match those for your 2020 simulation?
Thank you @lihongli, @cgnolte, @hogrefe.christian, @Ben_Murphy, @RockeyZ and others for your questions and responses on this topic. I am learning a lot.
Thank you very much for your reply and suggestions. It is indeed a problem with the internal events of the emission inventory. After I converted it with m3tshift, a normal distribution appeared.
Hello, Professor, I also encountered a similar problem. The ozone concentration I simulated and the monitoring concentration NMB were only negative 46%, and the PM2.5 concentration was even lower. The following is my result.
CCTM.txt (543.9 KB)
The error message in your screenshot says you are looking for emissions of AACD, which is not found in any of the provided emissions input files. You need to either make sure that AACD exists on one of the emissions inputs or set CTM_EMISCHK to F.
If this does not solve your problem, please post your question in a new thread.
![09da9a59875f279fa9875fd525ae557|534x500]
(upload://fLWlkFj9hoGFkHZu2hcOil0EpVT.png)
Dear professor, thank you very much for receiving your message. At present, I have simulated the results of the first two days, which are June 29 and June 30, 2017, as shown in the figure. I have set 32 layers in the boundary layer, and the simulated pollutant concentration is still low at present. How should this situation be improved
Inspect your log file. Are the emissions being read correctly, or do you have many, many species that are not found?
Before posting again, please review the “PLEASE READ before posting” message. Make a new thread for your post. Include your log file. State clearly what you have done.
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?
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Hello, professor, the ozone concentration I have simulated is low at present. Blue is the simulated concentration, and yellow is the monitoring concentration. Below are my operation files and output files. Using the love words University MEIC emission inventory, the simulation range is more than half of China, the current output file has an output error of emissions.
run_cctm_Bench_201707wuddm.csh (38.5 KB)
CCTM.txt (556.7 KB)
CCTM_201706.txt (139.1 KB)
This is the output from running the file
@cgnolte @Ben_Murphy @RockeyZ @ykaore @cjcoats 重点词汇
46*/* 5000
通用场景
Dear professors, students really can’t solve it, I hope you professors have time to help me see what the problem is and how to solve this problem.
While there are other possibilities, the problem is usually emissions. What are the units in the emissions input files? I see from the log file that your PMFINE emissions are being ignored, because there is no rule mapping that emissions species to any model species. The same is true for BENZENE, CRES, and XYL. If PMFINE is an important species in your input dataset, you will need to add such a rule.
|> Checking for unused Emissions Variables:
============================================
GRIDDED_EMIS | Gridded Area Emissions File 1: 7 unused variables.
NASN
NR
PMFINE
XYL
CRES
MGLY
BENZENE
If you have not done so already, I would run one of the CMAQ benchmark domains, either for the Southeastern US in 2016 or the Northeastern US in 2018. I realize your domain of interest is China, but successfully running the benchmark would give you confidence that the modeling platform is working correctly.
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[Emissions - Google Drive]This is my emission NC file(https://drive.google.com/drive/folders/1WcRIrl8xzaTcMG5vttrT45yZfwJJUYrg)
Dear professor, my simulation results are as follows, and please give me some advice, students really can not get it.
