[MITgcm-devel] problem with 59c

[Dimitris Menemenlis]

Martin and Jinlun, a short update on problem that I was having with 59c.  The 
problem seemed to be caused by some weird combination of ocean and sea ice 
initial conditions, which caused some full-ocean-depth and sea-ice interaction 
instability in the integration.  Small random changes made this instability go 
away or not.  Thus it was not directly related to ZMIN, except in so far that 
this change was sufficient at times to remove the instability.  The solution for 
time being is to restart from climatological initial conditions and hope that 
this instability will not reappear.  Starting from PHC January initial 
conditions, I am now able to integrate stably, including all the latest bells 
and whistles in the code, i.e., useRealFreshWaterFlux, os7mp advection, 
salinity-dependent freezing point, salt retention in the ice, and multicategory 
ice.  Dimitris