Re: wrf dimension changing

From: ahmed lasheen <ahmed4kernel_at_nyahnyahspammersnyahnyah>
Date: Thu Oct 27 2011 - 14:05:24 MDT

both files are produced of the same WRF-NMM configureation and with
the same type of ICBC data model( GFS)
and i used the same wgrib command to cut them .
so what this difference means ?

On Thu, Oct 27, 2011 at 3:46 PM, Dennis Shea <shea@ucar.edu> wrote:
> %> ncl_filedump wrf.11102100.grb > dump.wrf.11102100
> %> ncl_filedump wrf.11102112.grb > dump.wrf.11102112
>
> The files are different sizes:
>      13295 Oct 27 07:32 dump.wrf.11102100
>      10171 Oct 27 07:32 dump.wrf.11102112
>
> The files you sent do not contain the same variables
> nor similarly sized forecast_time{0,4,5}.
>
> Further, the grids look different.
>
>
>
> %> diff dump.wrf.11102100 dump.wrf.11102112  | less
>
> 9,10c9,10
> < filename:     wrf.11102100
> < path: wrf.11102100
> ---
>> filename:     wrf.11102112
>> path: wrf.11102112
> 13,24c13,20
> <       forecast_time0 = 4
> <       g0_lat_1 = 151
> <       g0_lon_2 = 250
> <       lv_ISBL3 = 39
> <       forecast_time4 = 34
> <       g0_lat_5 = 179
> <       g0_lon_6 = 261
> <       lv_ISBL7 = 25
> <       lv_HYBL8 = 2
> <       forecast_time9 = 22
> <       g0_lat_10 = 179
> <       g0_lon_11 = 277
> ---
>>       forecast_time0 = 34
>>       g0_lat_1 = 179
>>       g0_lon_2 = 261
>>       lv_ISBL3 = 25
>>       lv_HYBL4 = 2
>>       forecast_time5 = 23
>>       g0_lat_6 = 179
>>       g0_lon_7 = 277
> [snip]
>
> wrf.11102100
>      float g0_lat_1 ( g0_lat_1 )
>         long_name :    latitude
>         GridType :     Cylindrical Equidistant Projection Grid
>         units :        degrees_north
>         Dj :   0.3333333
>         Di :   0.3333333
>         Lo2 :  65
>         La2 :  59
>         Lo1 :  -18
>         La1 :   9
>
>      float g0_lon_2 ( g0_lon_2 )
>         long_name :    longitude
>         GridType :     Cylindrical Equidistant Projection Grid
>         units :        degrees_east
>         Dj :   0.3333333
>         Di :   0.3333333
>         Lo2 :  65
>         La2 :  59
>         Lo1 :  -18
>         La1 :   9
>
>
>
> wrf.11102112
>      float g0_lat_1 ( g0_lat_1 )
>         long_name :    latitude
>         GridType :     Cylindrical Equidistant Projection Grid
>         units :        degrees_north
>         Dj :   0.333
>         Di :   0.3336231
>         Lo2 :  70
>         La2 :  55.922
>         Lo1 :  -16.742
>         La1 :  -3.352
>
>      float g0_lon_2 ( g0_lon_2 )
>         long_name :    longitude
>         GridType :     Cylindrical Equidistant Projection Grid
>         units :        degrees_east
>         Dj :   0.333
>         Di :   0.3336231
>         Lo2 :  70
>         La2 :  55.922
>         Lo1 :  -16.742
>         La1 :  -3.352
>
>
>
> On 10/27/11 2:35 AM, ahmed lasheen wrote:
>>
>> Hello
>> the output of the WRF is quit large to upload so i have cut only two
>> variable from the file (geopotential   height and u wind component)
>> but the size still quit large 250MB ,their name are
>> wrf.11102100 and   wrf.11102112
>> i found from the ncl_fildump that one of them has more dimension than
>> the other although they use  GFS data
>> the difference only is in the time 00 and 12 .
>> is it a problem of how NCL read the grib or it is a problem related to
>> the wrf itself .
>> thanks
>>
>>> Would you be able to provide us with a sample file? You can put it on our
>>> anonymous ftp. Please see:
>>>
>>> http://www.ncl.ucar.edu/report_bug.shtml
>>>
>>> for ftp instructions.
>>>
>>> I noticed from your attached output files that you are getting a warning:
>>>
>>>     warning:NclGRIB: Unknown grib parameter number detected (130, center
>>> 11, table version 2 grib record 172), using default variable name (VAR_130)
>>>
>>> These warnings should be paid attention to, because they could signify
>>> that NCL doesn't fully recognize the file.
>>>
>>> If we can get a sample file, we might be able to fix this problem soon.
>>>
>>> Thanks,
>>>
>>> --Mary
>>>
>>>
>>>
>>> On Oct 23, 2011, at 1:36 PM, ahmed lasheen wrote:
>>>
>>>> Hello
>>>> i have  problem in which the ncl_fildump of the WRF-NMM change from 00
>>>> to 12 forcast cycles ,i donot know why , both run are identical in all
>>>> things
>>>> so what makes such changes , i am using the GFS data for intial and
>>>> boundary condition for the WRF model.
>>>> i have attached the output of ncl_filddump of both files.
>>>> for example for 00 cycle
>>>>     forecast_time0 = 4
>>>>      g0_lat_1 = 151
>>>>      g0_lon_2 = 250
>>>>      lv_ISBL3 = 39
>>>>      forecast_time4 = 34
>>>>      g0_lat_5 = 179
>>>>      g0_lon_6 = 261
>>>>      lv_ISBL7 = 25
>>>>      lv_HYBL8 = 2
>>>>      forecast_time9 = 22
>>>>      g0_lat_10 = 179
>>>>      g0_lon_11 = 277
>>>>      lv_SPDY12 = 2
>>>>      forecast_time13 = 33
>>>>      forecast_time14 = 17
>>>>      forecast_time15 = 16
>>>>      forecast_time16 = 11
>>>>      forecast_time17 = 11
>>>> and for the 12
>>>>     forecast_time0 = 34
>>>>      g0_lat_1 = 179
>>>>      g0_lon_2 = 261
>>>>      lv_ISBL3 = 25
>>>>      lv_HYBL4 = 2
>>>>      forecast_time5 = 23
>>>>      g0_lat_6 = 179
>>>>      g0_lon_7 = 277
>>>>      forecast_time8 = 33
>>>>      forecast_time9 = 17
>>>>      forecast_time10 = 16
>>>>      forecast_time11 = 11
>>>>      forecast_time12 = 12
>>>>
>>>> i don't know why this is occurring  ?and how to get ride of these
>>>> changes if i wanna to write script for operational work
>>>> ahmed
>>>>
>>>> --
>>>> ===============
>>>> Ahmed Lasheen
>>>> Junior researcher at Cairo Numerical Weather Prediction Center (CNWPC)
>>>> Egyptian Meteorological Authority(EMA)
>>>> Cairo,Egypt
>>>> ===============
>>>> <2112><2100>_______________________________________________
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>>>
>>>
>>
>>
>>
>

-- 
===============
Ahmed Lasheen
Junior researcher at Cairo Numerical Weather Prediction Center (CNWPC)
Egyptian Meteorological Authority(EMA)
Cairo,Egypt
===============
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Received on Thu Oct 27 14:06:18 2011

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