[MITgcm-support] EmPmRfile, EmPmR

[Patrick Rosendahl]

Hi Martin,

thanks! I use the non-hydrostatic formulation. I think you are referring 
to this
 >> http://mitgcm.org/pelican/code_reference/vdb/code/167.htm#192_L
section of the code, where the Temp & Salt is actually added in a way 
that is correct for the rainy surface height increase. (Please scroll up 
a few lines until you see the "#ifdef EXACT_CONSERV").

Do you think I can change the code to execute it anyway (it is not 
executed because of
 >> nonlinFreeSurf.GT.0 .OR. usingPCoords
is false)?
Additionally, I probably have to change the eta-code, so that the rain 
is increasing the surface level. But I cannot find a good place in the 
code to do it.

best,
Patrick

Martin Losch wrote:
> Patrick,
> there is a flag called "useRealFreshWaterFlux", that makes the model  
> add volume to the topmost grid cell. I recommend to use it along with  
> exactConserv = .true. (you need to have the corresponding CPP flag  
> compiled with it). That should prevent your surface cells from  getting 
> negative salinities.
> 
> If you feel really adventurous turn on the non-linear free surface  with 
> r*-coordinates (global_ocean.cs32x15 has an example of this),  but 
> that's not really required for the model use actual freshwater  flux 
> (just makes is even more "physical" and stable for the kind of  forcing 
> that you are trying to apply).
> 
> Martin
> 
> PS. the EmPmR variable is used always (with or without seaice,  virtual 
> salt flux or not).
> 
> On 22 Mar 2007, at 15:17, Patrick Rosendahl wrote:
> 
>> Hi!
>>
>> I want to simulate rain that actually increases the waterlevel. If  I 
>> understand all the rain implementations in mitgcm, the rain is  
>> translated into a salt-flux. so after a while I will have negative  
>> salt values in the upper layer...
>>
>> model configuration is a closed water bassin that is partially  rained 
>> on. non-hs.
>>
>> I do not want to diagnose the aim package.
>>
>> best,
>> Patrick
>>
>> Andrea Molod wrote:
>>
>>> hi patrick,
>>> can you be a little more specific about what you mean?
>>> what kind of model configuration, and what do you mean
>>> by 'do rain'? a diagnostic for it in an aim package run?
>>> something else? then maybe we can answer.
>>> andrea
>>> ----------------------------------------------------------------
>>> Andrea M. Molod, PhD.
>>> Department of Earth, Atmospheric & Planetary Sciences
>>> MIT
>>> Tel: (617) 253-5458, Email: amolod at mit.edu
>>> WWW:http://paoc.mit.edu/paoc/people/person.asp? 
>>> position=Postdoc&who=molod
>>> ----------------------------------------------------------------
>>> On Mon, 12 Feb 2007, Patrick Rosendahl wrote:
>>>
>>>> Hello all,
>>>>
>>>> the variable EmPmR is only used in the seaice and the  
>>>> aim_compon_interf package, the web-sourcecode tells me.
>>>>
>>>> What is the best way to do "rain" (neglecting the vertical  
>>>> velocities at the moment)?
>>>>
>>>> Best regards,
>>>> Patrick Rosendahl
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