[MITgcm-support] STOP MOM_IMPLICIT_R: error when solving 3-Diag problem.

[kunal madkaiker]

Dear All,

I am trying to simulate U,V currents circulation along the West Coast of
India.
I have a grid of 720 x 1560 with a high resolution of 1.45km x 1.45km, with
25 levels in the vertical from 0 to 2150m. I have set hFacMin=0.3 and
hFacMinDz=10

But model blows up at the initial stage and I get the error:
Note: The following floating-point exceptions are signalling:
IEEE_INVALID_FLAG IEEE_DIVIDE_BY_ZERO IEEE_UNDERFLOW_FLAG
STOP MOM_IMPLICIT_R: error when solving 3-Diag problem.

I have tried changing viscAh from 1 to 1000 m2/s and viscAz from 0.02 to
0.001 m2/s. Also tried with viscAhgrid=0.1.
I have defined the vertical levels keeping delZ(k+1)/delZ(k) < 1.4 ratio in
mind. But the issue persists. Kindly advise.
Please let me know if any additional information is required from my side.

Regards
Kunal
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