Hi Jamie,
Currently, NCL does not support the ensemble dimension for GRIB files.
This will be added to the request for GRIB enhancements.
Sorry
Dennis Shea
>
>I'm reading a grib file containing ncep ensemble gfs forecast using the
>addfile function.
>There should be multiple ensemble members (12) in this file, but ncl
>indicates there is
>only one variable (time,lat, lon). Am I doing something wrong or is
>this a limitation in the
>addfile function?
>
>The data file I'm working with is on ftp if anyone wants to
>look at it: ftp://ftp.cdc.noaa.gov/Public/jds/t700.2005040400
>
>Thanks,
>-Jamie Scott
>
>Here is my ncl code :
>;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
>begin
>name="t700.2005050400.grb"
>finfo=addfile(name,"r")
>print(finfo)
>z=finfo->TMP_2_ISBL_10
>printVarSummary(z)
>end
>;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
>Here's the output from this code:
>
> Copyright (C) 1995-2004 - All Rights Reserved
> University Corporation for Atmospheric Research
> NCAR Command Language Version 4.2.0.a032
> The use of this software is governed by a License Agreement.
> See http://ngwww.ucar.edu/ncl/ for more details.
>Variable: finfo (file variable)
>
>filename: t700.2005050400
>path: /data/map/ensemble/mrfdata/t700.2005050400
> file global attributes:
> dimensions:
> forecast_time0 = 65
> lat_2 = 73
> lon_2 = 144
> variables:
> float TMP_2_ISBL_10 ( forecast_time0, lat_2, lon_2 )
> sub_center : NCEP Ensemble Products
> center : US National Weather Service - NCEP (WMC)
> long_name : Temperature
> units : K
> _FillValue : -999
> level_indicator : 100
> grid_number : 2
> parameter_number : 11
> model : Spectral Statistical Interpolation (SSI) analysis from
>"Aviation" run.
> level : 700
> initial_time : 05/04/2005 (00:00)
>
> float lat_2 ( lat_2 )
> grid_description : 10512-point (73x144) global
>longitude-latitude grid. (0,0) at 0E, 90N, latitude grid. (0,0) at
>0E, 90N, matrix layout. N.B.: prime meridian not duplicated.
> units : degrees_north
> long_name : latitude
>
> float lon_2 ( lon_2 )
> grid_description : 10512-point (73x144) global
>longitude-latitude grid. (0,0) at 0E, 90N, latitude grid. (0,0) at
>0E, 90N, matrix layout. N.B.: prime meridian not duplicated.
> units : degrees_east
> long_name : longitude
>
> integer forecast_time0 ( forecast_time0 )
> long_name : Forecast offset from initial time
> units : hours
>
>
>
>Variable: z
>Type: float
>Total Size: 2733120 bytes
> 683280 values
>Number of Dimensions: 3
>Dimensions and sizes: [forecast_time0 | 65] x [lat_2 | 73] x [lon_2 |
>144]
>Coordinates:
> forecast_time0: [0..384]
> lat_2: [90..-90]
> lon_2: [ 0..357.5]
>Number Of Attributes: 11
> sub_center : NCEP Ensemble Products
> center : US National Weather Service - NCEP (WMC)
> long_name : Temperature
> units : K
> _FillValue : -999
> level_indicator : 100
> grid_number : 2
> parameter_number : 11
> model : Spectral Statistical Interpolation (SSI) analysis from
>"Aviation" run.
> level : 700
> initial_time : 05/04/2005 (00:00)
>
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