Ask Your Question

Blow-up at first time step when ONLINE cppdef used

asked 2022-05-30 17:48:57 +0100

this post is marked as community wiki

This post is a wiki. Anyone with karma >5 is welcome to improve it.

Hi there,

I am using BULK_FLUX and have already ran my model with ERA5 data interpolated offline. However, this is intensive on disk space so I would like to use the online interpolation option.

I have encountered an issue with define ONLINE where the model crashes after the first timestep. This is using the same data that was processed by the offline interpolation. When the model used the offline interpolated data, it ran for a full three years with no issue. Therefore, I didn't expect it to crash now after one timestep.

Any comments or suggestions would be greatly appreciated.


edit retag flag offensive close merge delete

1 answer

Sort by ยป oldest newest most voted

answered 2022-05-30 18:57:34 +0100


Could you tell us how the model crashes ? what is the content of your croco.out file ?



edit flag offensive delete link more


Hi Matthieu, I will come back to you, my model is now crashing in it's original format (undef ONLINE) so there is something else wrong. Regards Joe

jmcgovern gravatar imagejmcgovern ( 2022-05-31 11:13:33 +0100 )edit

1. There were only a few differences between the model setup with and without ONLINE activated. The main difference now compared to previously, is that I have adapted the contents of the croco_blk_ERA5_Y*M*.nc file so that so that it contains the pressure field. This involved adding pressure to....

jmcgovern gravatar imagejmcgovern ( 2022-05-31 13:11:50 +0100 )edit

2. ...the create_bulk.m file, and processing pressure then as part of interp_ERA5.m. However, when running ONLINE, these croco_blk files are needed for tides. I have added tides to the croco_blk files because there isn't a croco_frc file when bulk formulation is used. This file is copied and......

jmcgovern gravatar imagejmcgovern ( 2022-05-31 13:14:34 +0100 )edit

3. relabelled as as this is the file type that the tides must be read from. Is it possible that the model crashes, whether ONLINE is defined or not, **due to the addition of the pressure field to the croco_blk files**? If so, your advice would be appreciated on a suitable fix for this.

jmcgovern gravatar imagejmcgovern ( 2022-05-31 13:16:37 +0100 )edit

Hi, I think you are mixing the bulk file and the forcing file. The tides waves must be contained in the forcing file (see forcing section in The bulk flux are in the bulk files (see bulk_forcing in the

Matthieu.C gravatar imageMatthieu.C ( 2022-05-31 15:14:27 +0100 )edit
Login/Signup to Answer

Question Tools

1 follower


Asked: 2022-05-30 17:48:57 +0100

Seen: 118 times

Last updated: May 30