[MITgcm-support] FW: Diagnose momentum equation

[Jean-Michel Campin]

Hi Lianzhan,

It's likely that if Temp & Salt remains uniform, U/Vm_dPHdx will be zero
(no hydrostatic pressure anomaly horizontal gradient).
Not very clear why U/Vm_Cori would be zero everywhere except for surface level,
unless the velocity (uVel,vVel) is also zero everywhere below k=1.

What type of forcing do you have in this set-up ?

If you could send (in attachement) the 2 parameter files "data" and
"data.pkg", this would help to figure out what is happening.

Cheers,
Jean-Michel

On Sat, Sep 26, 2015 at 01:27:27PM +0000, lianzhan wrote:
> Hello everyone
> 
> I want to diagnose the effect of all items in momentum equation (as below for zonal).
> dU/dt+UdU/dx+VdU/dy+WdU/dz=fv-1/rho*dP/dx+Fx+taux/rho
> Fx is dissipative stress, taux is wind stress. Is there any corresponding variable in pkg/diagnostics ? I have tried "U/Vm_Advec" for nonlinear term, but this variable is zero expect for the surface layer. Its value is as same as "U/Vm_Cori", the value of "U/Vm_Cori" is also zero below surface. And "U/Vm_dPHdx"(pressure gradient force ? ) is all zero.
> The settings of my exp is that there is an island located in an ideal rectangular bay,  near which there is a sill. The model has 32 vertical layers and with free surface. The Temp/Salt is uniform. 
> Do you have any recommendations or suggestions?
> Thanks in advance for your helpCheers,Lianzhan
> 
> 
> xiaober at outlook.com
> 
>  		 	   		   		 	   		  

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