Greetings,
I am having some trouble with YOTC model data
(http://data-portal.ecmwf.int/data/d/yotc_od/levtype=pl/type=an/).
When I use ncl_filedump on the pv .grib format YOTC data I get normal
lat lon grids. However, the primary variables are packed using
spherical harmonics (I may be phrasing this wrong). These variables
have half the “lon” elements (it isn’t really lon correct?) and an
extra dimension real_imaginary. I saw some old messages pertaining to
this problem but I can’t seem to figure out how to get this into the
same coordinates as the pv.
I’d like to read in these “packed” primary variables and covert them
to the dimensions that pv is in. Any help with this would be greatly
appreciated!
I’ve included the results of ncl_filedump on pv and temperature data below.
Thanks,
Matt (janiga_at_atmos.albany.edu)
Copyright (C) 1995-2009 - All Rights Reserved
University Corporation for Atmospheric Research
NCAR Command Language Version 5.1.1
The use of this software is governed by a License Agreement.
See http://www.ncl.ucar.edu/ for more details.
Variable: f (file variable)
filename: pv.200807
path: pv.200807.grib
file global attributes:
dimensions:
initial_time0_hours = 124
lv_ISBL1 = 15
g4_lat_2 = 800
g4_lon_3 = 1600
variables:
float PV_GDS4_ISBL ( initial_time0_hours, lv_ISBL1, g4_lat_2, g4_lon_3 )
center : European Center for Medium-Range Weather
Forecasts (RSMC)
long_name : Potential vorticity
units : K m**2 kg**-1 s**-1
_FillValue : 1e+20
level_indicator : 100
gds_grid_type : 4
parameter_table_version : 128
parameter_number : 60
forecast_time : 0
forecast_time_units : hours
double initial_time0_hours ( initial_time0_hours )
long_name : initial time
units : hours since 1800-01-01 00:00
double initial_time0_encoded ( initial_time0_hours )
long_name : initial time encoded as double
units : yyyymmddhh.hh_frac
float g4_lat_2 ( g4_lat_2 )
long_name : latitude
GridType : Gaussian Latitude/Longitude Grid (Quasi-Regular)
units : degrees_north
N : 400
Di : 0.225
Lo2 : 359.775
La2 : -89.827
Lo1 : 0
La1 : 89.827
float g4_lon_3 ( g4_lon_3 )
long_name : longitude
GridType : Gaussian Latitude/Longitude Grid (Quasi-Regular)
units : degrees_east
N : 400
Di : 0.225
Lo2 : 359.775
La2 : -89.827
Lo1 : 0
La1 : 89.827
integer lv_ISBL1 ( lv_ISBL1 )
long_name : isobaric level
units : hPa
string initial_time0 ( initial_time0_hours )
long_name : Initial time of first record
units : mm/dd/yyyy (hh:mm)
Copyright (C) 1995-2009 - All Rights Reserved
University Corporation for Atmospheric Research
NCAR Command Language Version 5.1.1
The use of this software is governed by a License Agreement.
See http://www.ncl.ucar.edu/ for more details.
Variable: f (file variable)
filename: t.200807
path: t.200807.grib
file global attributes:
dimensions:
initial_time0_hours = 124
lv_ISBL1 = 15
real_imaginary = 2
g50_lat_3 = 800
g50_lon_4 = 800
variables:
float T_GDS50_ISBL ( initial_time0_hours, lv_ISBL1,
real_imaginary, g50_lat_3, g50_lon_4 )
center : European Center for Medium-Range Weather
Forecasts (RSMC)
long_name : Temperature
units : K
_FillValue : 1e+20
level_indicator : 100
gds_grid_type : 50
parameter_table_version : 128
parameter_number : 130
forecast_time : 0
forecast_time_units : hours
double initial_time0_hours ( initial_time0_hours )
long_name : initial time
units : hours since 1800-01-01 00:00
double initial_time0_encoded ( initial_time0_hours )
long_name : initial time encoded as double
units : yyyymmddhh.hh_frac
integer lv_ISBL1 ( lv_ISBL1 )
long_name : isobaric level
units : hPa
string initial_time0 ( initial_time0_hours )
long_name : Initial time of first record
units : mm/dd/yyyy (hh:mm)
-- ********************************** Matthew A. Janiga Department of Earth and Atmospheric Sciences, ES 330 University at Albany / State University of New York 1400 Washington Avenue Albany, NY 12222 PH: (847) 962-8397 Email: janiga_at_atmos.albany.edu ********************************** _______________________________________________ ncl-talk mailing list List instructions, subscriber options, unsubscribe: http://mailman.ucar.edu/mailman/listinfo/ncl-talkReceived on Fri Sep 18 2009 - 09:20:04 MDT
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