[MITgcm-support] Temperature drift in tutorial ( tutorial_global_oce_latlon: Global Ocean Simulation at 4◦ Resolution).

[Krishnakumar Rajagopalan]

Hi All,

We ran the tutorial (tutorial_global_oce_latlon) for a thousand years and find 
that there is a drift in the temperature.  See the attached figure which shows, 
for example,  the temperature at longitude=158deg and latitude= 2deg, for some 
depths;  the temperature at 3010m fails to reach a steady state even after 
1000yrs. Although the annual integral of Qnet equals zero, the annual integral 
of heat flux flowing into the computational domain due the relaxation term is 
not. Could this be a reason for the drift in temperature? Is there any 
setting/method to reduce this (drift in temperature).  Our study also shows that 
the temperature drift persists even on a higher resolution grid.

Thanks in advance

Krishnakumar

(University of Hawaii at Manoa)



      
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