Groups
Groups
Sign in
Groups
Groups
wrf-chem
Conversations
About
Send feedback
Help
wrf-chem
Contact owners and managers
1–30 of 474
Welcome to the WRF-Chem discussion forum. This forum is hosted by the
Atmospheric Chemistry Observations & Modeling
laboratory at NCAR/UCAR.
Mark all as read
Report group
0 selected
soumyajyoti jana
, …
Catalyst26
6
Jan 5
How to run WRF-CHEM without dust in chem_opt=202
Hello Dr. Mary and Dr. Kumar, I know that the PX LSM was designed for the contiguous USA domain, as
unread,
How to run WRF-CHEM without dust in chem_opt=202
Hello Dr. Mary and Dr. Kumar, I know that the PX LSM was designed for the contiguous USA domain, as
Jan 5
Naser Mohammadzadeh
,
Mary Barth
2
12/29/25
Underestimation Issue in MOZCART Results
Hello Naser, Your question is a science question and not about addressing technical issues with the
unread,
Underestimation Issue in MOZCART Results
Hello Naser, Your question is a science question and not about addressing technical issues with the
12/29/25
Naser Mohammadzadeh
,
Gabriele Pfister
2
12/26/25
Question on dust_opt and seas_opt for RACM-MADE-VBS (chem_opt=108)
Hello Nasar, as mentioned previously in our Discussion Forum we cannot help with questions other than
unread,
Question on dust_opt and seas_opt for RACM-MADE-VBS (chem_opt=108)
Hello Nasar, as mentioned previously in our Discussion Forum we cannot help with questions other than
12/26/25
Akhtar Memon
,
Gabriele Pfister
2
12/23/25
Require help running WRF-Chem
Hello Akhtar a few suggestions: - set debug_level to 12 or higher, this way you will get more
unread,
Require help running WRF-Chem
Hello Akhtar a few suggestions: - set debug_level to 12 or higher, this way you will get more
12/23/25
Carlos Bucaram
,
Gabriele Pfister
3
12/20/25
NEI inventory for recent years
Dear Dr. Pfister, Thank you for your feedback and comments on the previous inquiries. Kind regards,
unread,
NEI inventory for recent years
Dear Dr. Pfister, Thank you for your feedback and comments on the previous inquiries. Kind regards,
12/20/25
Naser Mohammadzadeh
,
Gabriele Pfister
4
12/18/25
WRF-Chem Performance with Hourly and 12-Hourly Emissions
Hello I don't think we can help you with your question as this is not a technical issue but more
unread,
WRF-Chem Performance with Hourly and 12-Hourly Emissions
Hello I don't think we can help you with your question as this is not a technical issue but more
12/18/25
George Priftis
,
Mary Barth
3
12/9/25
WRF-Chem hangs: open_aux_u
Thank you Mary! I have already set the auxinput7_inname in the namelist.input under the time_control
unread,
WRF-Chem hangs: open_aux_u
Thank you Mary! I have already set the auxinput7_inname in the namelist.input under the time_control
12/9/25
Rupa
,
Gabriele Pfister
2
12/8/25
Creating a local emission inventory for WRF CHEM
Hello Rupa you might want to check out the anthro_emis and EPA_anthro_emis tools we provide on our
unread,
Creating a local emission inventory for WRF CHEM
Hello Rupa you might want to check out the anthro_emis and EPA_anthro_emis tools we provide on our
12/8/25
Will H
11/21/25
WRF-MOSIT Is Finally Updated: A One-Stop Installer for the WRF Modeling Ecosystem
Good afternoon Meteorologists, Atmospheric Scientists, Emergency Managers, and modelers around the
unread,
WRF-MOSIT Is Finally Updated: A One-Stop Installer for the WRF Modeling Ecosystem
Good afternoon Meteorologists, Atmospheric Scientists, Emergency Managers, and modelers around the
11/21/25
Anh Thư Nguyễn
,
Mary Barth
3
11/19/25
TESTCASE DOWNLOAD
Dear Dr. Mary Barth, Thank you for your attention to my post. I will put my query to the WRF forum as
unread,
TESTCASE DOWNLOAD
Dear Dr. Mary Barth, Thank you for your attention to my post. I will put my query to the WRF forum as
11/19/25
Will H
11/17/25
WRF-Chem Emissions Guide, WRF-CHEM Users Guide
Found these documents hidden in an old forum. I hope it helps people out
unread,
WRF-Chem Emissions Guide, WRF-CHEM Users Guide
Found these documents hidden in an old forum. I hope it helps people out
11/17/25
Setareh Rahimi
,
Mary Barth
2
11/12/25
Inquiry Regarding Appropriate chem_opt Selection for CBMZ–MOSAIC with Aqueous Chemistry
Setareh, There may be more information in the literature about what exact chem_opt was used for
unread,
Inquiry Regarding Appropriate chem_opt Selection for CBMZ–MOSAIC with Aqueous Chemistry
Setareh, There may be more information in the literature about what exact chem_opt was used for
11/12/25
mriganka biswas
,
Mary Barth
4
11/11/25
Emission preparation for WRF-GHG
Hello Mriganka, Again, it is best to post your question at the WRF help forum to hopefully reach a
unread,
Emission preparation for WRF-GHG
Hello Mriganka, Again, it is best to post your question at the WRF help forum to hopefully reach a
11/11/25
Solomon Kim
2
11/6/25
WRF-CHEM high resolutions
Adding Suhas to the thread! On Thursday, November 6, 2025 at 10:38:46 AM UTC-8 Solomon Kim wrote: Hi!
unread,
WRF-CHEM high resolutions
Adding Suhas to the thread! On Thursday, November 6, 2025 at 10:38:46 AM UTC-8 Solomon Kim wrote: Hi!
11/6/25
Giannis Koukoutsis
, …
Aura Lupascu
3
11/3/25
WRF-Chem 4.3.3 froze on first time step
Hi All, Maybe you can add the following settings in the namelist . auxinput5_inname = "
unread,
WRF-Chem 4.3.3 froze on first time step
Hi All, Maybe you can add the following settings in the namelist . auxinput5_inname = "
11/3/25
Akhtar Memon
,
Gabriele Pfister
2
10/29/25
Request suggestion
Hello Akhtar as we state on our website we cannot help you with chemistry options other than the by
unread,
Request suggestion
Hello Akhtar as we state on our website we cannot help you with chemistry options other than the by
10/29/25
Akhtar Memon
10/29/25
CBMZ-MOSAIC_8bins
Dear All, Can anybody provide me with an input file for the anthro_emis tool for CBMZ-MOSAIC_8bins (
unread,
CBMZ-MOSAIC_8bins
Dear All, Can anybody provide me with an input file for the anthro_emis tool for CBMZ-MOSAIC_8bins (
10/29/25
Akhtar Memon
10/23/25
Request help
Dear Gabriele, Namelist and error file is attached. kindly help in this regard, please. -- Regards
unread,
Request help
Dear Gabriele, Namelist and error file is attached. kindly help in this regard, please. -- Regards
10/23/25
Mauro Morichetti
10/21/25
European WRF-Chem Workshop 2026
Hi all, !!!! First call of the European WRF-Chem Workshop 2026 !!!! The workshop will be held in
unread,
European WRF-Chem Workshop 2026
Hi all, !!!! First call of the European WRF-Chem Workshop 2026 !!!! The workshop will be held in
10/21/25
Xinjie Huang
,
Gabriele Pfister
2
10/9/25
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
unread,
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
10/9/25
Akhtar Memon
10/9/25
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
unread,
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
10/9/25
Xinjie Huang
2
10/4/25
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
unread,
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
10/4/25
soumyajyoti jana
, …
Xinjie Huang
5
10/3/25
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
unread,
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
10/3/25
Akhtar Memon
,
Gabriele Pfister
4
10/2/25
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
unread,
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
10/2/25
nikhil korhale
,
Mary Barth
2
10/2/25
Negative values in concentrations
Nikhil, Thanks for checking the input and emissions file as well as trying a run with chem_option =
unread,
Negative values in concentrations
Nikhil, Thanks for checking the input and emissions file as well as trying a run with chem_option =
10/2/25
Akhtar Memon
,
Gabriele Pfister
2
9/29/25
I need Help running mozbc
Hello Akhtar you find all the information you need in the mozbc download package ad on our website:
unread,
I need Help running mozbc
Hello Akhtar you find all the information you need in the mozbc download package ad on our website:
9/29/25
sne...@gmail.com
9/2/25
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
9/2/25
Alice Burton
,
Mary Barth
2
8/6/25
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
8/6/25
Akhtar Memon
7/17/25
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
unread,
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
7/17/25
Ravi Prakash Maurya ce23d031
,
Gabriele Pfister
2
6/12/25
Error in running ndown
Hi Ravi this is more a question for the MPAS-WRF Support Forum (https://forum.mmm.ucar.edu/) but what
unread,
Error in running ndown
Hi Ravi this is more a question for the MPAS-WRF Support Forum (https://forum.mmm.ucar.edu/) but what
6/12/25