Grid imprinting when running C192 atmos with 1/4 deg ocean and seaice

[guillaumevernieres]

Description

We can see the imprinting of a grid on the sea ice and ocean. The figure attached depicts the seaice concentration standard deviation of a 30 member ensemble after a 6 hour forecast.

The initial conditions were created by:
1 - interpolating the gfs ensemble members from operations from C384 to C192
2 - adding the same ocean and seaice initial conditions for the 30 members
3 - omitting the mediator restarts

To Reproduce:

I don't think this is machine dependent, but my test was done on Hercules.

• Use a configuration of the coupled UFS that has FV3, MOM6 and CICE6
• use C192 for FV3 and 1/4 deg for MOM6 and CICE
• bootstrap/omit the mediator restart

[guillaumevernieres]

pinging @DeniseWorthen and @junwang-noaa

[junwang-noaa]

@DeniseWorthen Is this issue related to how ocean/ice grids/meshes are created or the interpolation issue between the two components?

[DeniseWorthen]

I believe the issue is related to the conservative mapping we do for ATM states->OCN and ICE. And at least one reason we don't do that is the very old issue of "stripes" that Ufuk mentioned recently. That issue is NOAA-EMC/CMEPS#38 (comment)

[benjamin-cash]

@guillaumevernieres - could you point me to the ICs on Hercules and hash of the model/workflow you are using? I have the model set up to run C192mx025 on Frontera and can see if I get the same result. I'm also having an issue with the model crashing on start up that I sort of suspect is related to the ICs I'm using, so this would also let me test that.

[guillaumevernieres]

@guillaumevernieres - could you point me to the ICs on Hercules and hash of the model/workflow you are using? I have the model set up to run C192mx025 on Frontera and can see if I get the same result. I'm also having an issue with the model crashing on start up that I sort of suspect is related to the ICs I'm using, so this would also let me test that.

Warm restarts for m001:

/work/noaa/da/gvernier/sandboxes/global-workflow/sorc/gdas.cd/build/gdas/test/gw-ci/GFSv17-3DVAR-C384mx025/COMROOT/GFSv17-3DVAR-C384mx025/enkfgdas.20210630/12/mem001/model

Commit of the UFS (ufs_model.fd): commit 6a4e09e94773ffa39ce7ab6a54a885efada91f21

[benjamin-cash]

@guillaumevernieres - It looks like I will need permissions added to see those files, starting with the sandboxes directory:

[cash@hercules-login-3 ~]$ ls -l /work/noaa/da/gvernier
total 679420
-rwxr-x---  1 gvernier da 690850711 Jun 13  2022 Anaconda3-2022.05-Linux-x86_64.sh
drwxr-sr-x 11 gvernier da      4096 Apr 17 15:10 ai
drwxr-s--- 28 gvernier da      4096 Jun 13  2022 anaconda3
drwxr-sr-x  8 gvernier da      4096 Sep 30 17:07 ensda
-rw-r-----  1 gvernier da     11021 Jun 13  2022 oceanview.yaml
drwxr-s---  6 gvernier da      4096 Oct 10 18:23 sandboxes

[guillaumevernieres]

@guillaumevernieres - It looks like I will need permissions added to see those files, starting with the sandboxes directory:

[cash@hercules-login-3 ~]$ ls -l /work/noaa/da/gvernier
total 679420
-rwxr-x---  1 gvernier da 690850711 Jun 13  2022 Anaconda3-2022.05-Linux-x86_64.sh
drwxr-sr-x 11 gvernier da      4096 Apr 17 15:10 ai
drwxr-s--- 28 gvernier da      4096 Jun 13  2022 anaconda3
drwxr-sr-x  8 gvernier da      4096 Sep 30 17:07 ensda
-rw-r-----  1 gvernier da     11021 Jun 13  2022 oceanview.yaml
drwxr-s---  6 gvernier da      4096 Oct 10 18:23 sandboxes

Sure, let's take this offline @benjamin-cash . My email is [email protected]

[guillaumevernieres]

Let's try this: /work/noaa/da/gvernier/mem001 not sure this will work since da and gvernier are definitely da --- Guillaume Vernieres

…

On Fri, Oct 11, 2024 at 3:01 PM benjamin-cash ***@***.***> wrote: @guillaumevernieres <https://github.com/guillaumevernieres> - It looks like I will need permissions added to see those files, starting with the sandboxes directory: ***@***.*** ~]$ ls -l /work/noaa/da/gvernier total 679420 -rwxr-x--- 1 gvernier da 690850711 Jun 13 2022 Anaconda3-2022.05-Linux-x86_64.sh drwxr-sr-x 11 gvernier da 4096 Apr 17 15:10 ai drwxr-s--- 28 gvernier da 4096 Jun 13 2022 anaconda3 drwxr-sr-x 8 gvernier da 4096 Sep 30 17:07 ensda -rw-r----- 1 gvernier da 11021 Jun 13 2022 oceanview.yaml drwxr-s--- 6 gvernier da 4096 Oct 10 18:23 sandboxes — Reply to this email directly, view it on GitHub <#2466 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADLBX4GYIM4SIRIOCCLJ4FDZ3AN75AVCNFSM6AAAAABPY624H6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDIMBXHE3TGMRVHE> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[sanAkel]

Let's try this: /work/noaa/da/gvernier/mem001 not sure this will work since da and gvernier are definitely da --- Guillaume Vernieres
…

It works for me!