UM13.9 running AMIP for 1Y1M and last month output is missing on MASS

Unified Model
1

Hello,

My Gregorian nudged suite u-dw372 has completed successfully. The run was configured for 1Y1M, covering December 2019 to December 2020. However, the December 2020 output is missing from the apm.pp file.

There are no errors reported in the logs, but the output stops at November 2020, and the final month is not produced.

I would appreciate any suggestions on how to resolve this issue.

Thank you,
Meghna

2

Hi Meghna,

This is (partly) by design. The postprocessing task calculates seasonal means using monthly data on the disk, so needs to hold on to Dec, Jan, Feb for the winter means. The file cylc-run/u-dw372/run1/share/data/History_Data/dw372a.pm2020dec does exist.
There is a Cylc-8 issue raised earlier on this forum which means that the workflow does not ‘know’ that Dec2020 is the last segment so all data needs to be archived. The last restart dump (for 20210101) has also not been archived for this reason.
You can either:

  • Increase RUN_LEN to P1Y3M and restart the suite using cylc vr to run the extra January, Feb months so all data gets archived after djf means. OR
  • Edit app/postproc/rose-app.conf , set [env]ARCHIVE_FINAL=true ; restart with ‘cylc vr’ and re-trigger the postproc_transform followed by postproc_archive tasks manually.
    Remember to set the value to ‘false’ as this setting is only valid for the last month.

Mohit

3

Hi Mohit,
Thanks for the explanation, I did P1Y3M and restart the suite with cylc vr, still I can’t get Dec 2020 month output, also I can’t see seasonal mean DJF for 2021 archived on mass. Though I can see model run fine for additional 2 months and on monsoon - cylc-run>u-dw372 could see output additional folders for the new months. Still something wrong due to which dec2020 haven’t archived yet?

Best,

Meghna

4

Hi,

That is not something I have seen before . However, cylc-run/u-dw372/run1/log/job/20200301T0000Z/postproc_archive/NN/job.out i.e. the postprocessing for March-2020 indicates that the monthly means from December2019 -Feb2020 were archived at the end of this month !

I am not sure why there is an extra month’s wait, unless the files being re-initialised 3-monthly cross this boundary somehow, having started in December instead of the usual January for UKESM. So, you can try extending for one more month, or the ARCHIVE_FINAL method above.

5

Hi Mohit,

Thanks a lot! It did worked when I include one extra month. Though I will try another method too since in this method I need to output extra months which I might not need.

Thanks again,

Meghna

6

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