R: Meaning of descriptor file (*.ctl) variable names

[Diego Morelli]

Ok, thank you!!!
It's clear now.

Diego

-----Messaggio originale-----
Da: GRADSUSR at LIST.CINECA.IT [mailto:GRADSUSR at LIST.CINECA.IT] Per conto di
Wesley Ebisuzaki
Inviato: giovedì 12 novembre 2009 16.02
A: GRADSUSR at LIST.CINECA.IT
Oggetto: Re: Meaning of descriptor file (*.ctl) variable names

Diego,

Sometimes a variable may be available as a vertical profile. Sometimes a
variable may only be available on
one or two levels. When a variable is available as a vertical profile on
pressure surfaces, the suffix "prs" is
used. If the variable is not available on a vertical profile, the suffix
is the level descriptor.

Wesley Ebisuzaki


Diego Morelli wrote:
>
> When I use grib2ctl (v0.9.12.5p45) it issues a ctl file with some
> variables having the suffix “mb”. These variables are relative to an
> isobaric level type (value 100 in the PDS grib section, octet number
> 10), with a value expressed in hPa.
>
> I see that the variables with suffix prs are relative also to an
> isobaric level type.
>
> My questions is to know what is the difference between the variable
> with suffix mb and those with suffix prs.
>
> Here there is an example of a descriptor file:
>
>
----------------------------------------------------------------------------
----------------------------------------------
>
>
> dset ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
>
> index ^LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b.idx
>
> undef 9.999E+20
>
> title LFPW00190127.20090718144212_P4320PT76BE_BPMG12.86093.b
>
> * produced by grib2ctl v0.9.12.5p45
>
> dtype grib 255
>
> options yrev
>
> ydef 66 linear 10.000000 1
>
> xdef 126 linear -60.000000 1.000000
>
> tdef 1 linear 12Z18jul2009 1mo
>
> * z has 6 levels, for prs
>
> zdef 6 levels
>
> 925 850 700 500 400 300
>
> vars 2
>
> * GPprs * 6 6,*100*,0 ** (profile) Geopotential [m^2/s^2]
>
> * VGRD925mb * 0 34,*100*,925 ** 925 mb v wind [m/s]
>
> ENDVARS
>
>
----------------------------------------------------------------------------
----------------------------------------------
>
>
> Regards,
>
> Diego
>