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Welcome to the WRF-Chem discussion forum. This forum is hosted by the
Atmospheric Chemistry Observations & Modeling
laboratory at NCAR/UCAR.
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Xinjie Huang
,
Gabriele Pfister
2
Oct 9
NEI 4km SMOKE output
Hi Xinjie the NEI emissions we provide on our website are at 12 km resolution and I am not aware of
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NEI 4km SMOKE output
Hi Xinjie the NEI emissions we provide on our website are at 12 km resolution and I am not aware of
Oct 9
Akhtar Memon
Oct 9
PM2.5 severely underestimates with observations
Dear All, Your support is required please. I want to study the source apportionment of PM2.5. I am
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PM2.5 severely underestimates with observations
Dear All, Your support is required please. I want to study the source apportionment of PM2.5. I am
Oct 9
Xinjie Huang
2
Oct 4
Issues using mozbc-produced chemical boundary conditions for MOZART-MOSAIC (202)
Apologies that in my previous namelist, I have a couple of bc options on for domains d02 and d03. I
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Issues using mozbc-produced chemical boundary conditions for MOZART-MOSAIC (202)
Apologies that in my previous namelist, I have a couple of bc options on for domains d02 and d03. I
Oct 4
soumyajyoti jana
, …
Xinjie Huang
5
Oct 3
MOZART-MOSAIC error (option 202)
Hi Rakesh, I want to second that I have the exactly same problem with you: chem_opt=202 doesn't
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MOZART-MOSAIC error (option 202)
Hi Rakesh, I want to second that I have the exactly same problem with you: chem_opt=202 doesn't
Oct 3
Akhtar Memon
,
Gabriele Pfister
4
Oct 2
Need Help Running WRF-Chem
Hi this is really a question that is best directed to the WRF/MPAS Forum. But basically it depends on
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Need Help Running WRF-Chem
Hi this is really a question that is best directed to the WRF/MPAS Forum. But basically it depends on
Oct 2
nikhil korhale
,
Mary Barth
2
Oct 2
Negative values in concentrations
Nikhil, Thanks for checking the input and emissions file as well as trying a run with chem_option =
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Negative values in concentrations
Nikhil, Thanks for checking the input and emissions file as well as trying a run with chem_option =
Oct 2
Akhtar Memon
,
Gabriele Pfister
2
Sep 29
I need Help running mozbc
Hello Akhtar you find all the information you need in the mozbc download package ad on our website:
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I need Help running mozbc
Hello Akhtar you find all the information you need in the mozbc download package ad on our website:
Sep 29
sne...@gmail.com
Sep 2
Issue with mapping coarse and fine PM in MOZART-MOSAIC
Hi all, I used epa_anthro_emis to prepare anthropogenic emissions and use them as inputs for WRF-Chem
unread,
Issue with mapping coarse and fine PM in MOZART-MOSAIC
Hi all, I used epa_anthro_emis to prepare anthropogenic emissions and use them as inputs for WRF-Chem
Sep 2
soumyajyoti jana
, …
Rajesh Kumar
5
Aug 20
How to run WRF-CHEM without dust in chem_opt=202
Hello Dimeji, You can also set the value of EROD variable in your wrfinput file to zero over your
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How to run WRF-CHEM without dust in chem_opt=202
Hello Dimeji, You can also set the value of EROD variable in your wrfinput file to zero over your
Aug 20
Alice Burton
,
Mary Barth
2
Aug 6
Request for Guidance on PM2.5 and PM10 Calculation from WRF-Chem Outputs
Hello Alice, WRF-Chem has a module that calculates PM2.5 and PM10. It's called sum_pm_driver
unread,
Request for Guidance on PM2.5 and PM10 Calculation from WRF-Chem Outputs
Hello Alice, WRF-Chem has a module that calculates PM2.5 and PM10. It's called sum_pm_driver
Aug 6
Akhtar Memon
Jul 17
I need help running WRF-Chem
Dear All, Your kind support is required: I want to study the source apportionment of PM2.5 in 3 x
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I need help running WRF-Chem
Dear All, Your kind support is required: I want to study the source apportionment of PM2.5 in 3 x
Jul 17
Ravi Prakash Maurya ce23d031
,
Gabriele Pfister
2
Jun 12
Error in running ndown
Hi Ravi this is more a question for the MPAS-WRF Support Forum (https://forum.mmm.ucar.edu/) but what
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Error in running ndown
Hi Ravi this is more a question for the MPAS-WRF Support Forum (https://forum.mmm.ucar.edu/) but what
Jun 12
Sunny Kant
,
Gabriele Pfister
3
Jun 9
Attempting to add CH4 emissions input to the mozc_t1_em emission scheme
Hi Gabi, Thank you for the clarification. I will proceed with adding the necessary fields to registry
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Attempting to add CH4 emissions input to the mozc_t1_em emission scheme
Hi Gabi, Thank you for the clarification. I will proceed with adding the necessary fields to registry
Jun 9
Akhtar Memon
,
Gabriele Pfister
5
Jun 5
Issue in running WRF-Chem
I have made all the suggested changes but the issue/error persists. On Wed, Jun 4, 2025 at 8:44 PM
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Issue in running WRF-Chem
I have made all the suggested changes but the issue/error persists. On Wed, Jun 4, 2025 at 8:44 PM
Jun 5
Deepak
, …
David Yates
3
May 27
Matching time error in wrfchemi_d01 file
Hi, if you are using, io_style_emissions = 2, then the Times variable needs to match the time of the
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Matching time error in wrfchemi_d01 file
Hi, if you are using, io_style_emissions = 2, then the Times variable needs to match the time of the
May 27
Aparna C
, …
Indranil Nandi
3
May 24
Problem with MACCity emissions
Dear Aparna, Anthro utility program reads the 'date' and 'datesec' variables in the
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Problem with MACCity emissions
Dear Aparna, Anthro utility program reads the 'date' and 'datesec' variables in the
May 24
Aparna C
May 23
Enquiry Regarding MACCity emission
Hi, I am using MACCity emission file for my WRF-Chem simulation. It includes 720 times steps (60 year
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Enquiry Regarding MACCity emission
Hi, I am using MACCity emission file for my WRF-Chem simulation. It includes 720 times steps (60 year
May 23
Rui Pedro Silva
May 20
Problem with CLDFRA when progn=1
Dear all, I am running WRF-Chem v4.1.3 to study aerosol-radiation-cloud interactions using chem_opt=
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Problem with CLDFRA when progn=1
Dear all, I am running WRF-Chem v4.1.3 to study aerosol-radiation-cloud interactions using chem_opt=
May 20
Qiwei
May 18
MOZART+MOSAIC mechanism: what variable "sulf" is in the output file and why "MSA" diasppear in the mechanism
Hello, I'm using MOZART+MOSAIC in WRF-Chem and get my ouput file. Since I care more about species
unread,
MOZART+MOSAIC mechanism: what variable "sulf" is in the output file and why "MSA" diasppear in the mechanism
Hello, I'm using MOZART+MOSAIC in WRF-Chem and get my ouput file. Since I care more about species
May 18
Aparna C
,
Mary Barth
2
May 8
To reduce the WRF-Chem simulation time
Hi Aparna, Is there any way you can use more processors? With 420x400 grid points, I estimate that
unread,
To reduce the WRF-Chem simulation time
Hi Aparna, Is there any way you can use more processors? With 420x400 grid points, I estimate that
May 8
Akhtar Memon
,
Gabriele Pfister
20
May 6
Issue with PM2.5 Output in WRF-Chem Model Run
HI Akhtar The error message is about a memory corruption but I cannot say what exactly is the issue.
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Issue with PM2.5 Output in WRF-Chem Model Run
HI Akhtar The error message is about a memory corruption but I cannot say what exactly is the issue.
May 6
fjp...@gmail.com
, …
衣清
23
May 3
Perturbations in NO by lightning do not alter NO2 mixing ratio
Thank you for your reply. My problem has been solved perfectly. After my inspection, I found that the
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Perturbations in NO by lightning do not alter NO2 mixing ratio
Thank you for your reply. My problem has been solved perfectly. After my inspection, I found that the
May 3
Nafisa Islam
,
Gabriele Pfister
2
Apr 21
WRF-Chem PM2.5 Anomaly: EDGAR+MEGAN > EDGAR+MEGAN+FINN?
Hello Nafisa please be aware that we cannot help you when you are using chemistry schemes other than
unread,
WRF-Chem PM2.5 Anomaly: EDGAR+MEGAN > EDGAR+MEGAN+FINN?
Hello Nafisa please be aware that we cannot help you when you are using chemistry schemes other than
Apr 21
Xinjie Huang
,
Gabriele Pfister
3
Apr 17
floating invalid for 'lon' when mapping
Thanks Gabi for your reply. This issue always occurs with stack emission files, ie, running only d01
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floating invalid for 'lon' when mapping
Thanks Gabi for your reply. This issue always occurs with stack emission files, ie, running only d01
Apr 17
Mukesh Khadav
,
Gabriele Pfister
5
Apr 16
Issue with PM2.5 and other pollutants output in WRF-Chem
Thank you for the information. On Wed, 16 Apr 2025 at 01:02, Gabriele Pfister <pfi...@ucar.edu
unread,
Issue with PM2.5 and other pollutants output in WRF-Chem
Thank you for the information. On Wed, 16 Apr 2025 at 01:02, Gabriele Pfister <pfi...@ucar.edu
Apr 16
Merve Eke
,
Gabriele Pfister
6
Apr 9
WRF-Chem hangs without any error
Hi Merve the only I can think of is a potential memory issue. I do not understand why the upper-layer
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WRF-Chem hangs without any error
Hi Merve the only I can think of is a potential memory issue. I do not understand why the upper-layer
Apr 9
Mukesh Khadav
,
Gabriele Pfister
2
Apr 7
Error while doing ./wrf.exe
Hello please note that you are using chem_opt=34 and we can only support the by us contributed
unread,
Error while doing ./wrf.exe
Hello please note that you are using chem_opt=34 and we can only support the by us contributed
Apr 7
Muhammad Burhan Khalid
,
Gabriele Pfister
2
Apr 4
WRF-Chem Execution Issue
Hello I see you are running with chem_opt=301 and unfortunately we cannot help you with this. We only
unread,
WRF-Chem Execution Issue
Hello I see you are running with chem_opt=301 and unfortunately we cannot help you with this. We only
Apr 4
Swathi V S
,
Gabriele Pfister
4
Apr 3
Error in emission files for WRF Chem ( wrf_season_wes_usgs_d01, exo_coldens_d01, wrfchemi_d01, wrfbiochemi_d01 and wrffirechemi_d01)
Hello Swathi, I am still not sure why you want to run real.exe again if you already created the
unread,
Error in emission files for WRF Chem ( wrf_season_wes_usgs_d01, exo_coldens_d01, wrfchemi_d01, wrfbiochemi_d01 and wrffirechemi_d01)
Hello Swathi, I am still not sure why you want to run real.exe again if you already created the
Apr 3
Deepak
,
Gabriele Pfister
2
Apr 2
How to get AOD, TCO,TCNOx as a variable in wrfout file
Hello Deepak there is no output for the tropospheric column and you will have to calculate column
unread,
How to get AOD, TCO,TCNOx as a variable in wrfout file
Hello Deepak there is no output for the tropospheric column and you will have to calculate column
Apr 2