[MITgcm-support] 回复： too SMALL rStarFac[C,W,S]

[Haoran Xu]

Thanks for your help



---- 回复的原邮件 ----
| 发件人 | Martin Losch<Martin.Losch at awi.de> |
| 日期 | 2022年07月18日 19:48 |
| 收件人 | MITgcm Support<mitgcm-support at mitgcm.org> |
| 抄送至 | |
| 主题 | Re: [MITgcm-support] too SMALL rStarFac[C,W,S] |
This usually means that either the model blows up due to numerical instabilities (and this is then reflected in strangely low values of Eta), or more likely that you are continuously loosing “mass”/volume and your sea surface height is dropping, or if you are using sea ice, then the ice thickness may be too high and depresses your surface too much. Check your mean and minimum Eta (e.g. from the monitor output dynstat_eta_mean/min) over time to find out. How to fix this depends on your general configuration, which I know nothing about.


Martin



On 18. Jul 2022, at 13:42, Haoran Xu <xu1jian2wei3 at 163.com> wrote:


Dear all，
        Hope everything's fine, I recently encountered a error when the model running for 4 years, the rStarFac[C,W,S]  are too small.


 fail at i,j=  21   3 ; rStarFacC,H,eta =  0.008609  2.000000E+01 -1.982781E+01
 fail at i,j=  21   4 ; rStarFacS,H,eta = -0.051725  2.000000E+01 -1.982781E+01 -2.225077E+01
 fail at i,j=  22   4 ; rStarFacC,H,eta = -0.215612  2.000000E+01 -2.431223E+01
 fail at i,j=  22   4 ; rStarFacW,H,eta = -0.164265  2.000000E+01 -2.225077E+01 -2.431223E+01
 fail at i,j=  22   5 ; rStarFacS,H,eta = -0.177673  2.000000E+01 -2.431223E+01 -2.279858E+01
WARNING: r*FacC < hFacInf at       2 pts : bi,bj,Thid,Iter=   1   1   1     35071
WARNING: r*FacW < hFacInf at       1 pts : bi,bj,Thid,Iter=   1   1   1     35071
WARNING: r*FacS < hFacInf at       2 pts : bi,bj,Thid,Iter=   1   1   1     35071
STOP in CALC_R_STAR : too SMALL rStarFac[C,W,S] !


      I've tried to change the value of depth or eta but not work. Thanks for any advices.
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