#2220 closed Defect (invalid)

adaptive EVP (ice rheology) makes the model crash

Reported by: clem Owned by: systeam
Priority: low Milestone:
Component: SI3 Version: release-4.0
Severity: minor Keywords:


Activating the adaptive EVP for sea-ice rheology (instead of the regular EVP) results in a crash in ORCA2 after some iterations.
The lower nn_fsbc is, the sooner the model crashes.
For nn_fsbc=3, it occurs after about 6 months simulation. It is way shorter for nn_fsbc=1 and it does not crash for nn_fsbc=5.

I do not know why. Maybe aEVP just reveals an issue with the ice-ocean drags, or maybe there is a problem with the implementation of aEVP. In order to have time to investigate the origin of this behavior, I will set ln_aEVP to false for the time being.

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comment:1 Changed 13 months ago by clem

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

actually reducing the time step (4800s for ORCA2) is sufficient to stabilize the model. Since aEVP looks very promising in terms of ice behavior and since this issue seems to be only related to time step, I close this ticket

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