[MITgcm-support] using time step less than a second ??

[Abbas Dorostkar]

Hi Martin,
I need to run a very high resolution non-hydrostatic simulation with actual wind data. This means, I want to use the bulk formulae of Large & Pond. However, the simulation period is short and covers only 6 days. Probably to resolve this issue, I have to compute wind stresses outside mitgcm ? 
Thanks
Abbas

On 2012-07-11, at 8:11 AM, Martin Losch wrote:

> Abbas, I don't think that this has changed.
> 
> Do you seriously need the combination of exf and time steps below 1sec? EXF is very convenient for simulations with "realistic" forcing that span months to years to decades. But with a time step < 1s I assume that your simulations are very short in simulation period, so simpler forcing methods (such as the default external_fields_load method) would also be appropriate. Is that the case?
> 
> Martin
> 
> On Jul 6, 2012, at 11:55 PM, Abbas Dorostkar wrote:
> 
>> Hello all,
>> I remember we could not use time steps lower than 1 sec if we were using EXF package and/or some sort of calendar in simulation.  I am wondering if there has been improvement since then?
>> I was getting this error message back then:
>> 
>> (PID.TID 0000.0001) // execution environment starting up...
>> (PID.TID 0000.0001)
>> (PID.TID 0000.0001) // MITgcmUV version:  checkpoint61h
>> (PID.TID 0000.0001) // Build user:        hpc1921
>> (PID.TID 0000.0001) // Build host:        sflogin0
>> (PID.TID 0000.0001) // Build date:        Wed Aug  5 11:29:58 EDT 2009
>> 
>> PID.TID 0000.0001) ># *******************
>> (PID.TID 0000.0001) ># Calendar Parameters
>> (PID.TID 0000.0001) ># *******************
>> (PID.TID 0000.0001) > &CAL_NML
>> (PID.TID 0000.0001) ># TheCalendar='gregorian',
>> (PID.TID 0000.0001) >  TheCalendar='model',
>> (PID.TID 0000.0001) >  startDate_1=20071216,
>> (PID.TID 0000.0001) >  startDate_2=000000,
>> (PID.TID 0000.0001) > &
>> (PID.TID 0000.0001)
>> (PID.TID 0000.0001) CAL_READPARMS: finished reading data.cal
>> (PID.TID 0000.0001)   cal_Set: The time step is less than a second.
>> 
>> 
>> Thank you 
>> Abbas
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> 
> 
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