[MITgcm-support] MITgcm-support Digest, Vol 125, Issue 15

Thu Nov 21 07:32:28 EST 2013

Thank you both. It all falls into place then...;)
The diagnostics package seem useful too. should look into that…
Best regards!
Pär

21 nov 2013 kl. 11:32 skrev mitgcm-support-request at mitgcm.org:

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> Today's Topics:
> 
>   1. What is the unit of PH and PNH in the output files? (P?r Jansson)
>   2. Re: What is the unit of PH and PNH in the output	files?
>      (Jody Klymak)
>   3. Re: What is the unit of PH and PNH in the output	files?
>      (Martin Losch)
>   4. How to glue mnc output files with the cube-sphere exch2 grid
>      ? (Alexandre Pohl)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Wed, 20 Nov 2013 22:01:44 +0100
> From: P?r Jansson <jansson.par at telia.com>
> To: mitgcm-support at mitgcm.org
> Subject: [MITgcm-support] What is the unit of PH and PNH in the output
> 	files?
> Message-ID: <BDE5D665-5DF9-4848-ADA6-1CF273C6E0E2 at telia.com>
> Content-Type: text/plain; charset=iso-8859-1
> 
> Hi there!
> Sorry for asking such a trivial question, but I've scoured the manual, the online documentation and the support mails.
> Nowhere did i find the answer to my question;
> 
> What are the units of the pressure (PH and PNH) in the output fields from the model?
> I'm trying to evaluate the energy flux contents in internal waves etc. for my masters' thesis and 
> was assuming the output would be SI-units. That would mean Pascal (N/m^2), but they seem too small.
> In the variable list, some variables has the pressure in db and some are in Pascal. So I'm still confused...
> 
> 
> Best regards!
> /P?r Jansson
> University of Gothenburg
> 
> 
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Wed, 20 Nov 2013 16:08:43 -0800
> From: Jody Klymak <jklymak at uvic.ca>
> To: mitgcm-support at mitgcm.org
> Subject: Re: [MITgcm-support] What is the unit of PH and PNH in the
> 	output	files?
> Message-ID: <F69C7C14-6ED7-47A0-9951-2E52FFABCA03 at uvic.ca>
> Content-Type: text/plain; charset=iso-8859-1
> 
> Hi Par,
> 
> Its P/rhoconst, to the units are m^2/s^2.
> 
> Cheers,   Jody
> 
> 
> 
> 
> On Nov 20, 2013, at  13:01 PM, P?r Jansson <jansson.par at telia.com> wrote:
> 
>> Hi there!
>> Sorry for asking such a trivial question, but I've scoured the manual, the online documentation and the support mails.
>> Nowhere did i find the answer to my question;
>> 
>> What are the units of the pressure (PH and PNH) in the output fields from the model?
>> I'm trying to evaluate the energy flux contents in internal waves etc. for my masters' thesis and 
>> was assuming the output would be SI-units. That would mean Pascal (N/m^2), but they seem too small.
>> In the variable list, some variables has the pressure in db and some are in Pascal. So I'm still confused...
>> 
>> 
>> Best regards!
>> /P?r Jansson
>> University of Gothenburg
>> 
>> 
>> _______________________________________________
>> MITgcm-support mailing list
>> MITgcm-support at mitgcm.org
>> http://mitgcm.org/mailman/listinfo/mitgcm-support
> 
> --
> Jody Klymak    
> http://web.uvic.ca/~jklymak/
> 
> 
> 
> 
> 
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Thu, 21 Nov 2013 08:44:40 +0100
> From: Martin Losch <Martin.Losch at awi.de>
> To: <mitgcm-support at mitgcm.org>
> Subject: Re: [MITgcm-support] What is the unit of PH and PNH in the
> 	output	files?
> Message-ID: <CBD969E3-C52C-48ED-8E4E-4D9C62CAA3E2 at awi.de>
> Content-Type: text/plain; charset="iso-8859-1"
> 
> May I add that according to "available_diagnostics.log" (a useful list that you get when you turn on the diagnostics package):
>    XX |PHIHYD  | XX |       |SMR     MR|m^2/s^2         |Hydrostatic Pressure Pot.(p/rho) Anomaly
> 
> Here, "Anomaly" means that the constant contribution of gravity*abs(RC) is missing from PH and PHL (diagnostics names are PHIHYD and PHIBOT). That's another reason, why the values of PH may appear low. So to get the full pressure you need to do this:
> 
> P = (PHIHYD + gravity*abs(RC))*rho_const
> 
> although the second contribution is dynamically not relevant.
> 
> Martin
> 
> On Nov 21, 2013, at 1:08 AM, Jody Klymak <jklymak at uvic.ca> wrote:
> 
>> Hi Par,
>> 
>> Its P/rhoconst, to the units are m^2/s^2.
>> 
>> Cheers,   Jody
>> 
>> 
>> 
>> 
>> On Nov 20, 2013, at  13:01 PM, P?r Jansson <jansson.par at telia.com> wrote:
>> 
>>> Hi there!
>>> Sorry for asking such a trivial question, but I've scoured the manual, the online documentation and the support mails.
>>> Nowhere did i find the answer to my question;
>>> 
>>> What are the units of the pressure (PH and PNH) in the output fields from the model?
>>> I'm trying to evaluate the energy flux contents in internal waves etc. for my masters' thesis and 
>>> was assuming the output would be SI-units. That would mean Pascal (N/m^2), but they seem too small.
>>> In the variable list, some variables has the pressure in db and some are in Pascal. So I'm still confused...
>>> 
>>> 
>>> Best regards!
>>> /P?r Jansson
>>> University of Gothenburg
>>> 
>>> 
>>> _______________________________________________
>>> MITgcm-support mailing list
>>> MITgcm-support at mitgcm.org
>>> http://mitgcm.org/mailman/listinfo/mitgcm-support
>> 
>> --
>> Jody Klymak    
>> http://web.uvic.ca/~jklymak/
>> 
>> 
>> 
>> 
>> 
>> _______________________________________________
>> MITgcm-support mailing list
>> MITgcm-support at mitgcm.org
>> http://mitgcm.org/mailman/listinfo/mitgcm-support
> 
> 
> 
> 
> ------------------------------
> 
> Message: 4
> Date: Thu, 21 Nov 2013 11:32:00 +0100
> From: "Alexandre Pohl" <Alexandre.Pohl at lsce.ipsl.fr>
> To: <mitgcm-support at mitgcm.org>
> Subject: [MITgcm-support] How to glue mnc output files with the
> 	cube-sphere exch2 grid ?
> Message-ID: <997-528de100-19-2c496900 at 43585670>
> Content-Type: text/plain; charset="utf-8"
> 
> Hi,
> 
> I ran the verification/cpl_aim+ocn experience and I produced NetCdf files.It uses a cube-sphere Exch2 grid and I got one file per face (6 files).
> 
> I previously used gluemnc to glue the cartesian output files together, but it does not work with the exch2.
> 
> I also tested the rdmnc.m script. It extracts the variables from the 6 tiles but the result is not correct. The faces are glued to each other in no particular order. I join the result. We can see Africa on the left and Antarctica on the right.... not the expected result!
> 
> Is there a way to do that, like gluemnc does for a cartesian grid?
> I think you probably encountered this problem before?
> 
> Thanks a lot and with kind regards,
> Alexandre
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> End of MITgcm-support Digest, Vol 125, Issue 15
> ***********************************************