Opened 2 years ago

Closed 2 years ago

#2079 closed help (fixed)

New vegetation fraction ancillary causes model crash

Reported by: pmcjs Owned by: um_support
Component: UM Model Keywords:
Cc: Platform: ARCHER
UM Version: 10.5

Description

Hello,

I am trying to implement my own vegetation fraction ancillary file in version 10.5 (actually, it is a conversion of the old CMIP5 historical vegetation fraction file that I have regridded to the Endgame N96e grid using xancil, and carefully ensured that the land-sea mask agrees with this new version). I must be doing something right as the reconfiguration runs fine. The model crashes with

[0] ?  Error code: 3
[0] ?  Error from routine: GLUE_CONV_6A
[0] ?  Error message: Mid conv went to the top of the model at point           12 in seg on call  1
[0] ?  Error from processor: 95
[0] ?  Error number: 43

Leave files are at /work/n02/n02/pmcjs/cylc-run/u-aj654/log/job/19040901T0000Z/atmos_main/02/

Near the bottom of the *.out file there are NaNs? in "Slow physics source terms from atmos_physics1", which might be causing the problem.

The job ID is u-aj654, which is a copy of Ros's standard AMIP job for 10.5 but with SSTs, sea-ice, ozone and GHGs set to 1904 values and UKCA switched off (for now as ancil files are currently unavailable). Before changing the vegetation ancil it ran fine.

I wonder if this has anything in common with #1685.

Thanks,
Chris

Change History (1)

comment:1 Changed 2 years ago by pmcjs

  • Resolution set to fixed
  • Status changed from new to closed

This has been fixed: the new vegetation ancillary was too different to the old one and caused too big a jump between the start dump and the vegetation field I wanted to force the model with. I created a new transitional vegetation fraction ancillary that shifts from the present-day to the 1905 vegetation fractions over a period of 90 days, updating daily. I've only tested it for the first 3 days but checking the .out file suggests that the model is picking it up and using it and the job now runs without crashing.

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