Discussion on MODIS simulator axis definitions in cmip7-cmor-tables

[Tsuyoshi Koshiro]

Dear All,

I am currently working on CMORizing the output from COSPv2 as implemented in our climate model. However, for some of the MODIS simulator output variables, the axis definitions in the cmip7-cmor-tables do not appear to be consistent with those used by the COSP simulator. Therefore, I raised an issue in the cmip7-cmor-tables GitHub repository:
https://github.com/WCRP-CMIP/cmip7-cmor-tables/issues/149

According to the repository maintainer, any proposed changes of this kind would need to be discussed with the CFMIP co-chairs. If supported, the co-chairs could then bring them forward through the CMIP7 Data Request process. The issue was then closed.

I realize that there are several CFMIP mailing lists that might be appropriate for this discussion, but I thought I would raise it here first. I would appreciate your thoughts on these proposed changes, as well as any advice on how best to proceed.

Best regards,
Tsuyoshi

--
Tsuyoshi Koshiro <tkos...@mri-jma.go.jp>
Meteorological Research Institute (MRI), Tsukuba, Japan

[Robert Pincus]

Dear Tsuyoshi - 

Thanks very much for raising this issue. As I read the Github issue, the folks maintaining the CMOR tables would like any changes to be proposed via the CMIP/CFMIP Data Request.  I’ve put in explicit cc two of the CFMIP coordinators (Mark Zelinka, Alejandro Bodas-Salcedo) who I guess were responsible for formulating this request. They (or someone they know) can help understand if your concern is correct and how to make changes to the DR that will eventually propagate to the CMOR tables. 

Sorry this is such a difficult process. 

---
Robert Pincus

https://crew.ldeo.columbia.edu/people/robert-pincus

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[Tsuyoshi Koshiro]

Hi Robert, Mark, and Brandon,

Thank you very much for your feedback. I'm glad to hear that the proposed changes seem reasonable. Of course, please feel free to make any appropriate adjustments to the finer details, such as axis variable names.

If the changes are officially incorporated into the CMIP7 Data Request by CFMIP, I would like to wait until the cmip7-cmor-tables are updated accordingly.

Best regards,
Tsuyoshi

________________________________________
From: Brandon Duran <bmd...@ucsd.edu>
Sent: Thursday, July 23, 2026 3:47
To: Zelinka, Mark
Cc: robertp; cosp...@googlegroups.com; alejand...@METOFFICE.GOV.UK; Tsuyoshi Koshiro; Casey Wall
Subject: Re: Discussion on MODIS simulator axis definitions in cmip7-cmor-tables

Hi all,

Tsuyoshi, thanks for raising this issue. As Mark mentioned, the bin bounds for the MODIS histograms were updated in the past year in COSP in the Github issue he linked.

Per your Github issue, I think your proposed changes align with the updated version of COSP and should be used for CMIP7. I believe tau may have been used erroneously as a dimension for the LWP-re and IWP-re histograms due to some issues I faced when submitting the new variable request to CMIP last year, and should be corrected & renamed as you have suggested!

Happy to help / answer more questions if needed.

Cheers,
Brandon

On Wed, Jul 22, 2026 at 11:02 AM Zelinka, Mark <zeli...@llnl.gov<mailto:zeli...@llnl.gov>> wrote:
Adding Brandon Duran and Casey Wall to this thread in case they have input.

This previous issue may be relevant: https://github.com/CFMIP/COSPv2.0/pull/110#issuecomment-2663645528<https://urldefense.com/v3/__https://github.com/CFMIP/COSPv2.0/pull/110*issuecomment-2663645528__;Iw!!Mih3wA!GB4CggcqbyYXMJHHEjemQEEAYP9Ai_0gH1Klv9YxNICjsbB5AbFZ-7KCSYCMU3VktgC2MLgSn8mttdm_5W4$>

Mark

From: Robert Pincus <rob...@ldeo.columbia.edu<mailto:rob...@ldeo.columbia.edu>>
Date: Wednesday, July 22, 2026 at 7:09 AM
To: cosp...@googlegroups.com<mailto:cosp...@googlegroups.com> <cosp...@googlegroups.com<mailto:cosp...@googlegroups.com>>
Cc: Zelinka, Mark <zeli...@llnl.gov<mailto:zeli...@llnl.gov>>; alejand...@METOFFICE.GOV.UK<mailto:alejand...@METOFFICE.GOV.UK> <alejand...@METOFFICE.GOV.UK<mailto:alejand...@METOFFICE.GOV.UK>>; tkos...@MRI-JMA.GO.JP<mailto:tkos...@MRI-JMA.GO.JP> <tkos...@MRI-JMA.GO.JP<mailto:tkos...@MRI-JMA.GO.JP>>
Subject: Re: Discussion on MODIS simulator axis definitions in cmip7-cmor-tables

Dear Tsuyoshi -

Thanks very much for raising this issue. As I read the Github issue, the folks maintaining the CMOR tables would like any changes to be proposed via the CMIP/CFMIP Data Request. I’ve put in explicit cc two of the CFMIP coordinators (Mark Zelinka, Alejandro Bodas-Salcedo) who I guess were responsible for formulating this request. They (or someone they know) can help understand if your concern is correct and how to make changes to the DR that will eventually propagate to the CMOR tables.

Sorry this is such a difficult process.
---
Robert Pincus

https://crew.ldeo.columbia.edu/people/robert-pincus<https://urldefense.com/v3/__https://urldefense.us/v3/__https:/*crew.ldeo.columbia.edu/people/robert-pincus__;!!G2kpM7uM-TzIFchu!wWkuaU4mnnkjQmj7Nmo7QErMSneJIIJuOibahRH0PG_cKn7vPoz6MfZJQVe543hfi4sHclYy5Ijkt-KlevkNHvAdew$__;Lw!!Mih3wA!GB4CggcqbyYXMJHHEjemQEEAYP9Ai_0gH1Klv9YxNICjsbB5AbFZ-7KCSYCMU3VktgC2MLgSn8mtJn8IqeI$>

On Jul 22, 2026 at 12:21:21 AM, Tsuyoshi Koshiro <tkos...@mri-jma.go.jp<mailto:tkos...@mri-jma.go.jp>> wrote:
Dear All,

I am currently working on CMORizing the output from COSPv2 as implemented in our climate model. However, for some of the MODIS simulator output variables, the axis definitions in the cmip7-cmor-tables do not appear to be consistent with those used by the COSP simulator. Therefore, I raised an issue in the cmip7-cmor-tables GitHub repository:

https://github.com/WCRP-CMIP/cmip7-cmor-tables/issues/149<https://urldefense.com/v3/__https://urldefense.us/v3/__https:/*github.com/WCRP-CMIP/cmip7-cmor-tables/issues/149__;!!G2kpM7uM-TzIFchu!wWkuaU4mnnkjQmj7Nmo7QErMSneJIIJuOibahRH0PG_cKn7vPoz6MfZJQVe543hfi4sHclYy5Ijkt-KlevmWTg2GmA$__;Lw!!Mih3wA!GB4CggcqbyYXMJHHEjemQEEAYP9Ai_0gH1Klv9YxNICjsbB5AbFZ-7KCSYCMU3VktgC2MLgSn8mt_EPedXc$>

According to the repository maintainer, any proposed changes of this kind would need to be discussed with the CFMIP co-chairs. If supported, the co-chairs could then bring them forward through the CMIP7 Data Request process. The issue was then closed.

I realize that there are several CFMIP mailing lists that might be appropriate for this discussion, but I thought I would raise it here first. I would appreciate your thoughts on these proposed changes, as well as any advice on how best to proceed.

Best regards,
Tsuyoshi

--

Tsuyoshi Koshiro <tkos...@mri-jma.go.jp<mailto:tkos...@mri-jma.go.jp>>

Meteorological Research Institute (MRI), Tsukuba, Japan

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[Robert Pincus]

Mark, Alejandro - 

Just to be explicit, although everyone is agreement on these changes, Tsuyoshi is right that CFMIP will need to modify its entry in the CMIP data request. Does anyone know who could take that on? 

---
Robert Pincus

https://crew.ldeo.columbia.edu/people/robert-pincus

On Jul 23, 2026 at 1:29:48 AM, Tsuyoshi Koshiro <tkos...@mri-jma.go.jp> wrote:

Hi Robert, Mark, and Brandon,

Thank you very much for your feedback. I'm glad to hear that the proposed changes seem reasonable. Of course, please feel free to make any appropriate adjustments to the finer details, such as axis variable names.

If the changes are officially incorporated into the CMIP7 Data Request by CFMIP, I would like to wait until the cmip7-cmor-tables are updated accordingly.

Best regards,