[ecco-support] [EXTERNAL] Momentum Budget Terms

[Matthew Mazloff]

Hi Ian 

Quick answer is 
                   'TOTUTEND','AB_gU   ','Um_Diss ',
                   'Um_Advec','Um_dPHdx','Um_Ext  ',
                   'VISrI_Um','Um_Cori ‘,


For meridional would be
                   TOTVTEND','AB_gV   ','Vm_Diss ',
                   'Vm_Advec','Vm_dPHdy','Vm_Ext  ',
                   'VISrI_Vm','Vm_Cori ‘,

Long answer: I’ll forward you an email from Helen Pillar showing how to close momentum budget. It includes the needed data.diagnostics and it includes some extra diagnostics needed to decompose the terms. Some of the code for getting these extra diags is not in the main tree (I believe). Deb and I don’t need all those extra terms. Just the terms already in the available_diagnostics would be great for allowing one to close the momentum and vorticity budgets. 

Many thanks for offering to get these terms!

Matt


> On Jul 6, 2021, at 5:06 PM, Fenty, Ian G (US 329C) <ian.fenty at jpl.nasa.gov> wrote:
> 
> Hi Deb,
> Good question.  The vorticity budget tutorial (made by Maike Julie, https://github.com/maikejulie/ <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_maikejulie_&d=DwMGaQ&c=-35OiAkTchMrZOngvJPOeA&r=HSHS34ROdfL7f2oVxuKB761hrMvWN1RWA5k3SHGts_s&m=1013IbcUG46uebyJuhdwPBsJXLGFtg7c3Fi33Dx_UPU&s=TwUSstz8kQUf-n7QKvic81FYzAt5eVHhSdR3L3cP_Tc&e=>) uses a number of fields that we have not traditionally included as part of the official solution and so they are not on the ECCO drive.  
>  
> Looking at the vorticity budget tutorial I found the following set of variables:
>  
>     PHI_SURF      ETAN          Vm_Advec      Vm_Cori  
>     AB_gV         Vm_dPHdy      Vm_Ext        TOTVTEND 
>     VISrI_Vm      VBotDrag      Vm_Diss       AB_gU    
>     VISrI_Um      Um_dPHdx      Um_Ext        Um_Diss       
>     TOTUTEND      UBotDrag      Um_Cori       Um_Advec 
>  
> Of these we only include Um_dPHdx, Vm_dPHdy, ETAN, and PHI_SURF (via PHI_HYD). 
>  
> We could re-run V4r4 to generate the fields needed to close the momentum budget and add those fields for our future releases.  Can you confirm exactly which fields are needed?  Matt Mazloff (cc’d) may be able to help.
>  
> -Ian Fenty
>  
>  
> On 7/6/21, 4:10 PM, "ecco-support-bounces at mit.edu <mailto:ecco-support-bounces at mit.edu> on behalf of Deborah Gardner" <ecco-support-bounces at mit.edu <mailto:ecco-support-bounces at mit.edu> on behalf of dagardne at ucsd.edu <mailto:dagardne at ucsd.edu>> wrote:
>  
> Hi all,
>  
> I'm looking for the Um_[variable] terms and can't locate them in the ECCO drive. I'm looking to diagnose a closed momentum budget which I believe can only be accomplished with specific variables as opposed to computing with velocity variables. Does anyone know where I might be able to find the variables used in the Vorticity Budget Tutorial? Bonus points if it's Release 4
>  
>  
> Deb Gardner (she/her/ella)
> Best Waffle Topping, 2019 | Scripps Institution of Oceanography

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