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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