[MITgcm-support] [uv]stressfiles and runtime error

[Martin Losch]

Hi Michael,
make a local copy of EXF_OPTIONS.h (in your code directory) and in  
this copy you comment the line
#define ALLOW_ATM_WIND
and recompile. The exf-pkg then expects wind stress and computes wind  
from wind stress.

You can mimic the default behavior of the model (without exf) by  
unsetting (or commenting) all the lines ALLOW_ATM_WIND/TEMP/ 
DOWNWARD_RADIATION/RUN_OFF. Then you need to provide u/v-stress, net  
freshwater  flux and heat flux (the latter can be split into net  
shortwave and net long wave, depending on the status of  
ALLOW_SHORTWAVE in CPP_OPTIONS.h). This is the first line in the  
table in EXF_OPTIONS.h, but not the default behavior of exf. The  
default behavior of exf is to require u/v-10m-winds, 2m air  
temperature, humidity, and downward radiation (long and shortwave)  
and everything else is computed from the large+pond(81,82) bulkformulae.

Martin


On 10 Jul 2008, at 22:26, David Hebert wrote:

> It looks like ALLOW_BULKDFORMULAE and ALLOW_ATM_WIND appear in  
> EXF_OPTIONS.h, but I don't see why they would be set unless you  
> have set ALLOW_ATM_TEMP and ALLOW_ATM_WIIND. I don't think you want  
> to set these flags. Maybe something in code/packages.conf sets  
> them? Or genmake that is overriding settings? Unfortunately I have  
> never used wind stresses so your guess is as good as mine.
>
> >From the table in EXF_OPTIONS.h, it looks like you don't want ANY  
> flags set in order to read in wind stresses.
>
> Dave
>
>
> m. r. schaferkotter wrote:
>>
>> how is MITgcm configured to use windstress files?
>>
>> i generated files of (hopefully) the appropriate sizes and put  
>> names in data.exf
>>
>> PID.TID 0000.0001) > ustressfile        = 'taux.001.bin',
>> (PID.TID 0000.0001) > vstressfile        = 'tauy.001.bin',
>>
>> the executable aborted with a message:
>>
>> S/R EXF_CHECK: use u,v_wind components but not wind-stress
>>
>> i found that message is triggered in exf_check.F
>>
>>
>>  1  C $Header: /u/gcmpack/MITgcm/pkg/exf/exf_check.F,v 1.7  
>> 2007/06/27 21:38:09 heimbach Exp $
>>
>>     60  #if ( defined (ALLOW_BULKFORMULAE) && defined  
>> (ALLOW_ATM_WIND) )
>>     61        IF ( ustressfile .NE. ' ' .OR. ustressfile .NE. '  
>> ' ) THEN
>>     62          STOP
>>     63       & 'S/R EXF_CHECK: use u,v_wind components but not  
>> wind-stress'
>>     64        ENDIF
>>     65  #endif
>>
>> i don/t see how ALLOW_BULKFORMULAE and ALLOW_ATM_WIND have been  
>> defined...
>> they do not appear in any files in the code directory.
>>
>> please advise.
>>
>> michael
>>
>>
>>
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>
> -- 
> David A. Hebert
> NRC Postdoc
> Naval Research Lab
> Stennis Space Center, MS 39525
> david.hebert.ctr at nrlssc.navy.mil
> Phone: (228) 688-5846
> Fax:     (228) 588-5997
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