[gradsusr] Difference between sflux var's and pgrb var's

[Wesley Ebisuzaki - NOAA Federal]

Hi,

tmp0_10cm is the temperature 0-10 cm below the land surface
(discipline=meteorological product)
tsoil0_10cm is the soil temperature 0-10 cm below the land surface
(discipline=land surface product)

Logically both variables refer to the same quantity.  Originally people
used the 1st name because
the 2nd name wasn't defined.  Later the standard defined temperature for
land-surface, oceanographic,
hydrological and space-weather products.  So the 2nd name is more
descriptive and the
the new preferred name.  The "0,0,0" vs "2,0.2" is because the encoding of
the two names are
different (discipline, parameter category and parameter number).

sflux = special flux, usually on (model) Gaussian grid
pgrb2 = pressure (level) grib2 (often includes contents of sflux file),
usually on a lat-lon grid

Wesley


On Fri, Oct 16, 2015 at 12:27 AM, Christopher Gilroy <chris.gilroy at gmail.com
> wrote:

> Hey guys, learning grads (let alone model data) and I'm trying to figure
> out the difference between:
>
> sflux:
> tmp0_10cm  0,106,0,0.1   0,0,0 ** 0-0.1 m below ground Temperature [K]
> tmp10_40cm  0,106,0.1,0.4   0,0,0 ** 0.1-0.4 m below ground Temperature [K]
> tmp40_100cm  0,106,0.4,1   0,0,0 ** 0.4-1 m below ground Temperature [K]
> tmp100_200cm  0,106,1,2   0,0,0 ** 1-2 m below ground Temperature [K]
>
> pgrb2:
> tsoil0_10cm  0,106,0,0.1   2,0,2 ** 0-0.1 m below ground Soil Temperature
> [K]
> tsoil10_40cm  0,106,0.1,0.4   2,0,2 ** 0.1-0.4 m below ground Soil
> Temperature [K]
> tsoil40_100cm  0,106,0.4,1   2,0,2 ** 0.4-1 m below ground Soil
> Temperature [K]
> tsoil100_200cm  0,106,1,2   2,0,2 ** 1-2 m below ground Soil Temperature
> [K]
>
> They somewhat look the same, but the third set of number 0,0,0 and 2,0,2
> are different obviously, so outside of what "differences" there are between
> the 2, can anyone explain what the 0,0,0 and 2,0,2 actually means?
>
> Secondly, what exactly (maybe why they have so many different types is
> better) is the difference between the gfs sflux files and the gfs pgrb2
> files? I know the sflux files don't have all the var's that the pgrb2 files
> have but the sflux is the highest resolution data available, for the GFS,
> correct?
>
> I appreciate any help.
>
> Thanks!
>
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