20021210: GEMPAK: Soil Temperature/Moisture

Patrick,

The depth of the layers that the SOIM values are given is in centimeters 
as I listed below using the vertical coordinate
112 in $GEMTBL/grid/vcrdgrib1.tbl.

The parameter description in $GEMTBL/grid/ncepgrib2.tbl from the grib 388 manual
provides for:

!ID# NAME                             UNITS                GNAM
144 Volumetric soil moisture content  fraction             SOIM

The values of SOIM are being scaled by 100 (the *10**2) as you
show below. They are units=fraction, eg the values would actually
be between .08 and .96, so your color bar is showing scaled times 100 for
values more easily described as between 8% and 96%.

Steve Chiswell






>From: "Patrick O'Reilly" <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200212132240.gBDMeF409403

>Thanks Steve.  I understand that the SLTK will be in degrees K, but do you
>know offhand what units the SOIM is plotted by default?  In a quick plot I
>made, the units range from 8-96 per the colorbar, and the default title says
>'10:40 M SOIM (*10**2).  This appears to be in meters instead of cm?  Or
>does it just SAY meters but it's really cm?  My glevel=10:40.  Is this
>correct?  I think the units are kg/m**2, but need a little convincing.  Any
>light you can shine would be appreciated.  Thanks again!
>
>Patrick
>
>----- Original Message -----
>From: "Unidata Support" <address@hidden>
>To: "Patrick O'Reilly" <address@hidden>
>Cc: "Unidata Support" <address@hidden>
>Sent: Tuesday, December 10, 2002 5:43 PM
>Subject: 20021210: GEMPAK: Soil Temperature/Moisture
>
>
>>
>> Patrick,
>>
>> GEMTBL/grid/ tables show for ncep models:
>> SOIM  parameter 144 Volumetric soil moisture content.
>> SLTK  parameter 85  Ssoil temperature.
>>
>> In the NOAAPORT (HRS) grids, NGM grids 202, 207 and 211 carry SLTK at DPTH
>0.
>> ETA 212 carries soil temp and moisture at levels 0-10cm, 10-40cm,
>> 40-100cm, 100-200cm.
>>
>> CONDUIT feed Models that carry SOIM and SLTK  include:
>> ETA grids 212 and 104, RUC grid 236 and 252, AVN grid 3 and
>> MRF grids 2 and 3.
>>
>> When looking for parameters in certain models, you can use gdinfo with
>> GFUNC set to the specific variables, like GFUNC=SLTK;SOIM and
>> GLEVEL, GDATTIM, and GVCORD set to all.
>>
>> Steve Chiswell
>> Unidata User Support
>>
>> >From: "Patrick O'Reilly" <address@hidden>
>> >Organization: UCAR/Unidata
>> >Keywords: 200212102310.gBANAK425407
>>
>> >Hello in Boulder,
>> >
>> >I have browsed the help archives and found a couple tidbits about soil
>data,
>> >but not enough and none too recent.  I am looking to create some plots of
>> >soil temp and moisture and was wondering if this type of product is even
>> >available over the IDD.  If so, where is it located?  I haven't found any
>> >soil parameters in GEMPAK, is what I am looking to do even possible using
>> >only IDD data and GEMPAK?  Any hints, large or small, would be
>appreciated.
>> >Thanks!
>> >
>> >Patrick
>> >_______________________________________
>> >Patrick O'Reilly
>> >Meteorological Decision Support Scientist
>> >The STORM Project - University of Northern Iowa
>> >address@hidden  ~  ph: 319-273-3789
>> >
>>
>>
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