gridbox area diagnostic

[rosalindwest]

Hello,

I would like to know how to switch on the diagnostic for gridbox area, section 0 item 157. I am using vn7.3 with UKCA, running in atmosphere-only mode. When I try to load this item in the STASH panel I get the message Diag: "GRIDBOX AREAS M2" (0,157) (T6H,DIAG,UPE) DIAGNOSTIC ERROR: Diagnostic is not available for this model configuration."

Is there any way to switch it on or should I calculate it offline?

Thanks,

Rosalind.

[willie]

Hi Rosalind,

The diagnostic is not available, so you will have to provide it. One way to do this is to overwrite the diagnostic with your own using a user STASH master file. You will then need to modify the UM code to calculate the diagnostic and output it. Alternatively, as you say, you could do it offline.

Regards,

Willie

[willie]

Hi Rosalind,

I've created a user STASHmaster file Gridbox_0_157_ustash in my home directory in PUMA /home/willie. Just add the file to the user STASHmaster table. It makes the diagnostic available in section 0. I don't know if it will work (this seems to be associated with river routing), but it might be a quick fix.

Regards,

Willie

[rosalindwest]

Hi Willie,

Thanks for this. I've actually just added a gridbox area diagnostic
from within UKCA to section 38 item 485 which uses my userstash file
cdnc_diagsv7.3_RW6.

Sorry for any duplication, and thanks for your help,

Rosalind.