[MITgcm-support] Pressure field in MITgcm experiment

[Martin Losch]

PH is “totPhiHyd” (see model/src/write_state.F) and this is according to model/inc/DYNVARS.h:

C     totPhiHyd    :: total hydrostatic Potential (anomaly, for now),
C                     at cell center level ; includes surface contribution.
C                     (for diagnostic + used in Z-coord with EOS_funct_P)

PNH is the nonhydrostatic contribution (you can add PNH to PH).

hydrostatic pressure anomaly = PH * rhoConst
and similar for non-hydrostatic pressure anomaly PNH*rhoConst

the constant pressure is g*rhoConst*abs(z), so that
total pressure = PH * rhoConst + g*rhoConst*abs(z)

more details here:
<https://mitgcm.readthedocs.io/en/latest/algorithm/algorithm.html>

Martin

> On 27. Nov 2018, at 16:34, Павел Лобовиков <plobovikov at gmail.com> wrote:
> 
> Hi folks!
> 
> Can anybody tell me please how I can to calculate the pressure field based on PH and PNH output arrays?
> 
> I use MITgcm for reproducing laboratory experiment with internal wave generation in a hydrodynamic tray, and I need to calculate pressure that the wave exerts on the wall and bottom points during the propagation of the wave.
> 
> In laboratory experiments we have a several pressure sensors in our tray that measure pressire in Pa (Pascals), I need to compare pressure from sensors with pressure from MITgcm modelling results.
> 
> Thanks!  
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