[ecco-support] [EXTERNAL] Full pressure in ECCO4

[Wang, Ou (US 329B)]

Gabriel,

The full 3d pressure in meters (~dbar) can be calculated as 
P_full=(PHrefC+PHIHYD)/g, where g=9.81 m/s2

Since the model uses the r* vertical coordinate, the depth of each cell in vertical changes with time. So if you want to calculate the pressure at fixed depth, use PHIHYDcR in replace of PHIHYD
P_full_fixeddep = (PHrefC+PHIHYD)/g.
PHIHYDcR is provided in ECCO V4 Release3_alt. 

Regards,
Ou 

 is the 3d full pressure in m2/s2. Divide by g(=9.81m/s2) to convert it to meters (~dbar). 

On 6/23/20, 2:20 AM, "ecco-support-bounces at mit.edu on behalf of Gabriel Wolf" <ecco-support-bounces at mit.edu on behalf of g.a.wolf at reading.ac.uk> wrote:

    Dear ECCO teams,

    I’m doing some calculations for which I need the correct full pressure. I’m struggling to find information on this, so not sure I really get this right.
    I’m using ECCO version4 release 3alt (nctiles_monthly). As far as I understand it, the full 3d pressure P_full in dbar is calculated as

    P_full = (PHrefC + PHIHYD + SSH * g) * rhoConst * 1e-4

    with the notation as in the actual dataset, with rhoConst = 1029, g=9.81, PHrefC the 1d hydrostatic reference profile, PHIHYD the 3d anomaly from hydrostatic reference profile and SSH the sea surface height (contributing via the different sea surface heights).
    Is this the correct procedure? I would be happy if you could confirm this or tell me if I got this wrong.

    Best regards,
    Gabriel
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