Claudio Porrini
New member
Hello everyone,
I am reaching out for some assistance with my WRF-Chem simulation.
I have created an empty emissions file using prep_chem (with all fields set to zero). For testing purposes, I have generated the wrfinput file with chem_opt = 0. After linking my binary file from the output of prep_chem.exe, I used convert_emiss.exe to produce the wrfchemi_d01 file.
I then modified the wrfchemi_d01_<date> file by inserting emissions data derived from Copernicus satellite observations. However, I encounter an issue: the model only reads the emissions for the first hour. I can confirm this by visualizing the wrfout file.
I have tried multiple techniques found in forums and documentation to input emissions every hour into the WRF-Chem simulation, but I haven't had success.
Currently, I can run the model with wrfchemi_d01_<date>, which has dimensions of 1 time x 1 level x lat x lon. To attempt a solution, I created additional time levels by copying the first hour’s emissions. This resulted in a wrfchemi_d01_<date> file with dimensions 48 time x 1 level x lat x lon for a 48-hour simulation.
Although wrf.exe runs without errors and appears to introduce the data, there is no difference between a simulation with only the first hour of emissions and one with 48 hours of emissions. It seems that WRF-Chem is only using the emissions from the first hour.
I also tried creating one wrfchemi_d01_<date> file per hour, but this resulted in the same issue. Additionally, I experimented with io_style_emissions = 1 by creating two files (wrfchemi_00z_d01 and wrfchemi_12z_d01) with 12 frames each, but for a 24-hour run, I got the same result.
I am considering trying the restart option, but ideally, I would prefer to resolve this using the methods I have already attempted.
I’ve attached my namelist.input file for your reference. Any guidance or suggestions on how to correctly introduce hourly emissions would be greatly appreciated.
Thank you for your help.
Best regards,
Claudio
I am reaching out for some assistance with my WRF-Chem simulation.
I have created an empty emissions file using prep_chem (with all fields set to zero). For testing purposes, I have generated the wrfinput file with chem_opt = 0. After linking my binary file from the output of prep_chem.exe, I used convert_emiss.exe to produce the wrfchemi_d01 file.
I then modified the wrfchemi_d01_<date> file by inserting emissions data derived from Copernicus satellite observations. However, I encounter an issue: the model only reads the emissions for the first hour. I can confirm this by visualizing the wrfout file.
I have tried multiple techniques found in forums and documentation to input emissions every hour into the WRF-Chem simulation, but I haven't had success.
Currently, I can run the model with wrfchemi_d01_<date>, which has dimensions of 1 time x 1 level x lat x lon. To attempt a solution, I created additional time levels by copying the first hour’s emissions. This resulted in a wrfchemi_d01_<date> file with dimensions 48 time x 1 level x lat x lon for a 48-hour simulation.
Although wrf.exe runs without errors and appears to introduce the data, there is no difference between a simulation with only the first hour of emissions and one with 48 hours of emissions. It seems that WRF-Chem is only using the emissions from the first hour.
I also tried creating one wrfchemi_d01_<date> file per hour, but this resulted in the same issue. Additionally, I experimented with io_style_emissions = 1 by creating two files (wrfchemi_00z_d01 and wrfchemi_12z_d01) with 12 frames each, but for a 24-hour run, I got the same result.
I am considering trying the restart option, but ideally, I would prefer to resolve this using the methods I have already attempted.
I’ve attached my namelist.input file for your reference. Any guidance or suggestions on how to correctly introduce hourly emissions would be greatly appreciated.
Thank you for your help.
Best regards,
Claudio