[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Support #PRI-562474]: Gempak/ER40 reanalysis data?
- Subject: [Support #PRI-562474]: Gempak/ER40 reanalysis data?
- Date: Tue, 19 Sep 2006 10:31:33 -0600
>
> In a previous message to me, you wrote:
>
> >Pete,
> >The ensemble extension comes from the gb/gbensemble.c routine. The ENHW is a
> >whole
> >ensemble weighted median.
>
> That is bizzare.. I don't think these are ensemble members, but rather just
> a single value, from what I read of the data set information.
Pete,
The whole ensemble weighted mean bytes are in your PDS. The grib data has the
ensemble extended pds
past octet 28. Your other software may just not be showing all the bytes of the
pds.
Presumably, the reanalysis uses perterbations to get a handle on variability.
Steve Chiswell
Unidata User SUpport
>
> A short bit of output from wgrib for the U/V values shows:
>
> 949:20033136:d=97020600:U:kpds5=131:kpds6=100:kpds7=300:TR=0:P1=0:P2=0:TimeU=1:300
> mb:anl:ECMWF stream?:NAve=0
> 950:20054268:d=97020600:V:kpds5=132:kpds6=100:kpds7=300:TR=0:P1=0:P2=0:TimeU=1:300
> mb:anl:ECMWF stream?:NAve=0
> 951:20075400:d=97020600:U:kpds5=131:kpds6=100:kpds7=400:TR=0:P1=0:P2=0:TimeU=1:400
> mb:anl:ECMWF stream?:NAve=0
> 952:20096532:d=97020600:V:kpds5=132:kpds6=100:kpds7=400:TR=0:P1=0:P2=0:TimeU=1:400
> mb:anl:ECMWF stream?:NAve=0
> 953:20117664:d=97020600:U:kpds5=131:kpds6=100:kpds7=500:TR=0:P1=0:P2=0:TimeU=1:500
> mb:anl:ECMWF stream?:NAve=0
> 954:20138796:d=97020600:V:kpds5=132:kpds6=100:kpds7=500:TR=0:P1=0:P2=0:TimeU=1:500
> mb:anl:ECMWF stream?:NAve=0
> 955:20159928:d=97020600:U:kpds5=131:kpds6=100:kpds7=600:TR=0:P1=0:P2=0:TimeU=1:600
> mb:anl:ECMWF stream?:NAve=0
> 956:20181060:d=97020600:V:kpds5=132:kpds6=100:kpds7=600:TR=0:P1=0:P2=0:TimeU=1:600
> mb:anl:ECMWF stream?:NAve=0
>
> Why would these be interpreted as ensemble members instead of just a normal
> single U or V value?
>
> Pete
>
> >
> >The nagrib decoder provides a parameter PDSEXT that gives you the control to
> >turn off the
> >appending of extensions to the parameter names (such as the C001, P001,
> >etc).
> >Beware, if you turn that off, you need to decode all ensemble members
> >into different files so that they don't overwrite each other (eg, when you
> >have
> >HGHTC001, HGHTP001, HGHTN001, HGHTP002, etc., without the extension, they
> >will all be HGHT). The ens_ grid functions are designed to work that way with
> >separate files as well, so its not a bad thing, just more complicated in
> >determining the output file name.
> >
> >For dcgrib2, I have the flag to add extensions hardcoded in
> >$NAWIPS/unidata/ldmbridge/dcgrib2/dcwppg.c
> >to "pdsextflag = TRUE;".
> >
> >I could create a command line variable for dcgrib2 to toggle that as well.
> >
> >Steve Chiswell
> >Unidata User SUpport
> >
> >
> >>
> >> I am trying to convert the ECMWF ER40 reanalysis data from GRIB
> >> to GEMPAK format, (NCAR MSS data set DS118.1) using the following
> >> command:
> >>
> >> cat U57535.feb0105 | /home/gempak/GEMPAK5.9.3/os/linux/bin/dcgrib2 -d - -m
> >> 10000 -e GEMTBL=/home/gempak/GEMPAK5.9.3/gempak/tables
> >> YYMMDDHH_ecmwf_er40.gem
> >>
> >> I get a gempak file, but the variables all have ENHW appended to
> >> them, for example:
> >>
> >> GEMPAK-GDINFO>l
> >> GDFILE = 97020512_ecmwf_er40.gem
> >> LSTALL = YES
> >> OUTPUT = T
> >> GDATTIM = all
> >> GLEVEL = all
> >> GVCORD = PRES
> >> GFUNC = all
> >> GEMPAK-GDINFO>r
> >>
> >> GRID FILE: 97020512_ecmwf_er40.gem
> >>
> >> GRID NAVIGATION:
> >> PROJECTION: CED
> >> GRID SIZE: 144 73
> >> LL CORNER: -90.00 0.00
> >> UR CORNER: 90.00 357.50
> >>
> >> GRID ANALYSIS BLOCK:
> >> UNKNOWN ANALYSIS TYPE
> >>
> >> Number of grids in file: 253
> >>
> >> Maximum number of grids in file: 10000
> >>
> >> NUM TIME1 TIME2 LEVL1 LEVL2 VCORD PARM
> >> 1 970205/1200F000 1000 PRES PVORENHW
> >> 2 970205/1200F000 1000 PRES HGHTENHW
> >> 3 970205/1200F000 1000 PRES TMPKENHW
> >> 4 970205/1200F000 1000 PRES SPFHENHW
> >> 5 970205/1200F000 1000 PRES OMEGENHW
> >> 6 970205/1200F000 1000 PRES VORTENHW
> >> 7 970205/1200F000 1000 PRES DIVGENHW
> >> 8 970205/1200F000 1000 PRES RELHENHW
> >> 9 970205/1200F000 1000 PRES OZMRENHW
> >> 10 970205/1200F000 1000 PRES UWNDENHW
> >> 11 970205/1200F000 1000 PRES VWNDENHW
> >> 12 970205/1200F000 925 PRES PVORENHW
> >> 13 970205/1200F000 925 PRES HGHTENHW
> >> 14 970205/1200F000 925 PRES TMPKENHW
> >> 15 970205/1200F000 925 PRES SPFHENHW
> >> 16 970205/1200F000 925 PRES OMEGENHW
> >> 17 970205/1200F000 925 PRES VORTENHW
> >> 18 970205/1200F000 925 PRES DIVGENHW
> >> 19 970205/1200F000 925 PRES RELHENHW
> >> 20 970205/1200F000 925 PRES OZMRENHW
> >> 21 970205/1200F000 925 PRES UWNDENHW
> >> 22 970205/1200F000 925 PRES VWNDENHW
> >> 23 970205/1200F000 850 PRES PVORENHW
> >> 24 970205/1200F000 850 PRES HGHTENHW
> >> 25 970205/1200F000 850 PRES TMPKENHW
> >> 26 970205/1200F000 850 PRES SPFHENHW
> >> 27 970205/1200F000 850 PRES OMEGENHW
> >> 28 970205/1200F000 850 PRES VORTENHW
> >> 29 970205/1200F000 850 PRES DIVGENHW
> >> 30 970205/1200F000 850 PRES RELHENHW
> >> 31 970205/1200F000 850 PRES OZMRENHW
> >> 32 970205/1200F000 850 PRES UWNDENHW
> >> 33 970205/1200F000 850 PRES VWNDENHW
> >> 34 970205/1200F000 775 PRES PVORENHW
> >> 35 970205/1200F000 775 PRES HGHTENHW
> >>
> >>
> >> Any idea where the ENHW comes from, or how to make it not happen?
> >>
> >> Thanks,
> >>
> >> Pete
> >>
> >> --
> >> +>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+
> >> ^ Pete Pokrandt V 1447 AOSS Bldg 1225 W Dayton St^
> >> ^ Systems Programmer V Madison, WI 53706 ^
> >> ^ V address@hidden ^
> >> ^ Dept of Atmos & Oceanic Sciences V (608) 262-3086 (Phone/voicemail) ^
> >> ^ University of Wisconsin-Madison V 262-0166 (Fax) ^
> >> +<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+
> >>
> >>
> >
> >
> >Ticket Details
> >===================
> >Ticket ID: PRI-562474
> >Department: Support GEMPAK
> >Priority: Normal
> >Status: Closed
> >
>
>
> --
> +>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+
> ^ Pete Pokrandt V 1447 AOSS Bldg 1225 W Dayton St^
> ^ Systems Programmer V Madison, WI 53706 ^
> ^ V address@hidden ^
> ^ Dept of Atmos & Oceanic Sciences V (608) 262-3086 (Phone/voicemail) ^
> ^ University of Wisconsin-Madison V 262-0166 (Fax) ^
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+
>
>
Ticket Details
===================
Ticket ID: PRI-562474
Department: Support GEMPAK
Priority: Normal
Status: Closed