[MITgcm-support] density anomaly field

[Martin Losch]

Hi Mathilde,

which EOStype are you using? It looks a little like you are accidentally using the linear EOS with betaS=0 or so, just guessing. More information about your run would be good (content of namelists in “data” or beginning of STDOUT, until the end of initialization phase)

Martin

> On 17 Mar 2016, at 15:06, Mathilde Jutras <mathilde.jutras at mail.mcgill.ca> wrote:
> 
> Hi,
> 
> I am using MITgcm using the sea-ice package, and I have a small question about the output field RHOAnoma. It is described as Density Anomaly (=Rho-rhoConst). I use the default rhoConst value, so 999.8. However, I get values that seem strange to me, ranging from about 0 to -2, which would be equivalent to 1000 - 1002 kg/m3, rather small values for ocean water density.
> Furthermore, if I compute the density from salinity and temperature, I get more realistic values, around 1027. There is not simply a constant difference between the two, but also a multiplying factor of about 2 in the amplitudes of variations.
> 
> I was wondering if there was something to know about the RHOAnoma parameter, and if there was a reason why results would be different from the values computed from S and T.
> 
> Thank you very much,
> 
> Mathilde Jutras
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