[Wrf-users] Incorrect map projection for GRIB auxilliary historyoutput in Southern Hemisphere

[Hutchinson, Todd]

Hi Rich,
 
We wrote the grib routines, so we'll take a look at this.  As far as a I know, using the grib routines for southern Hemisphere domains has been minimal.  Thanks for pointing it out--I will look into it within the next week.
 
Todd

________________________________

From: wrf-users-bounces at ucar.edu on behalf of Richard Carpenter
Sent: Wed 12/19/2007 2:42 PM
To: wrf-users at ucar.edu
Subject: [Wrf-users] Incorrect map projection for GRIB auxilliary historyoutput in Southern Hemisphere



Hello,

 

We have modified the Registry in WRF V2.2 in order to output selected fields in GRIB1 format using auxiliary history files. The map projection is correct in the Northern Hemisphere, but not in the SH. This is evident by the wgrib diagnostic output showing a Lat1 of zero. Has anyone encountered this? Thank you.

 

NetCDF history file:

 

                :CEN_LAT = -38.44989f ;

                :CEN_LON = 144.83f ;

                :TRUELAT1 = -38.45f ;

                :TRUELAT2 = -38.45f ;

                :MOAD_CEN_LAT = -38.45f ;

                :STAND_LON = 144.83f ;

 

wgrib -V of wrfaux1:

 

rec 2:2423:date 2007121906 TMP kpds5=11 kpds6=105 kpds7=2 levels=(0,2) grid=0 2 m above gnd anl:

  TMP=Temp. [K]

  timerange 10 P1 0 P2 0 TimeU 254  nx 48 ny 48 GDS grid 3 num_in_ave 0 missing 0

  center 255 subcenter 255 process 220 Table 2 scan: WE:SN winds(N/S) 

  Lambert Conf: Lat1 0.000000 Lon1 137.831000 Lov 144.830000

      Latin1 -38.450000 Latin2 -38.450000 LatSP -90.000000 LonSP 0.000000

      South Pole (48 x 48) Dx 28.125000 Dy 28.125000 scan 64 mode 128

  min/max data 286.44 313.23  num bits 12  BDS_Ref 28644  DecScale 2 BinScale 0

 

Richard Carpenter

Weather Decision Technologies, Inc.

 

 

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