[MITgcm-support] Variables in pickup files

[Peng Zhan]

Thanks a lot, Martin.

On Tue, Sep 6, 2016 at 10:51 PM, Martin Losch <martin.losch at awi.de> wrote:

> Hi Peng,
>
> from model/inc/DYNVARS.h:
>
> C     State Variables:
> C     etaN  :: free-surface r-anomaly (r unit) at current time level
> C     uVel  :: zonal velocity (m/s, i=1 held at western face)
> C     vVel  :: meridional velocity (m/s, j=1 held at southern face)
> C     theta :: potential temperature (oC, held at pressure/tracer point)
> C     salt  :: salinity (ppt, held at pressure/tracer point)
> C     gX, gxNm1 :: Time tendencies at current and previous time levels.
> C     etaH  :: surface r-anomaly, advanced in time consistently
> C              with 2.D flow divergence (Exact-Conservation):
> C                etaH^n+1 = etaH^n - delta_t*Div.(H^n U^n+1)
> C  note: a) used with "exactConserv", necessary for Non-Lin free-surf and
> mixed
> C           forward/backward free-surf time stepping (e.g.,
> Crank-Nickelson)
> C        b) same as etaN but not necessarily at the same time, e.g.:
> C           implicDiv2DFlow=1 => etaH=etaN ; =0 => etaH=etaN^(n-1);
>
> Martin
>
> > On 05 Sep 2016, at 07:04, Peng Zhan <peng.zhan at kaust.edu.sa> wrote:
> >
> > Dear users,
> >
> > I am working on MITgcm with ensemble-based data assimilation and was
> trying to add increment to the existed pickup file.
> > In the pickup*.meta, there are 9 variables, but what's the difference
> between "EtaH" and "EtaN"? What are the "GuNm1" and "GvNm1" represent?
> >
> > Thanks in advance, Peng
> >
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-- 

Peng ZHAN

______________________________
PhD Candidate
Earth Science & Engineering (ErSE)
King Abdullah University of Science and Technology (KAUST)
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Mobile: +966 544701621
* <peng.zhan at kaust.edu.sa>*

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