[Mitgcm-support] Re: gBaro

[mitgcm-support at dev.mitgcm.org]

Jean-Michel Campin wrote:
> 
> Hello Olivier,
> 
> Actually (and nothing has change recently, from c2? to c36) cg2d_x
> is a height anomaly (P'surf / (g*rho_0)) and not a surface presure
> anomaly (P'surf).
> This make no difference in the dynamics (even with a free surface),
> because the same factor (called differently) is apply every where.
> But for the output and eventually the initialization with non-zero
> P'surf, this has to be kept in mind.
> We plan to change this in the next few weeks and to rely on more
> natural units to express the pressure surface anomaly.
> 
> Note: I am not sure of the units of gBaro : it should be equal
> to gravity, with the same unit ; but a conversion with a rho_0
> factor (with rho_0 = 1.kg/m3) might be necessary in some other part
> of the code.
> 
> See you,
> 
> Jean-Michel