[MITgcm-support] bottom pressure diagnostics

[Dimitris Menemenlis]

Jean-Michel, I will be very interested to hear your answer too.

Martin, up to now, I have always assumed that PHIBOT is the bottom pressure,
specifically that PHIBOT in m^2/s^2 is the anomaly relative to Depth * rhonil * g
so that the absolute bottom pressure in Pa is:
Depth * rhonil * g + PHIBOT * rhonil

6-hourly output of ETAN and PHIBOT is available for cube78 and cub81
is available online and on skylla.

Dimitris

On Feb 4, 2010, at 8:00 AM, Martin Losch wrote:

> Hi Jean-Michel (and Dimitris),
> 
> we would like to cube78 or cube81 bottom pressure results. Can you confirm that for a time series of anomalies (in time) we need both PHIBOT and ETAN (for the linear free surface contribution):
> 
> bottom pressure = gravity*rhoConst*ETAN + PHIBOT/rhoConst (+terms that are constant in time)
> 
> From looking at calc_phi_hyd I gather, that the non-linear free surface contribution etaH is only included, when selectRstar=0, which is not the case in cube78/81, correct? But in diags_phi_rlow, it says in the head that phi_hyd_rlow is actually bottom pressure. I am confused.
> 
> Martin
> 
> 
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