[ncl-talk] Read multiple nc files
Wang Xinyue
wang.xinyue.q6 at dc.tohoku.ac.jp
Fri Dec 22 04:20:27 MST 2017
Hi Karin,
Thanks for your prompt reply!
The 199902 dataset is just one of the datasets I want to read, I selected that one randomly and every single dataset got the same warning as:
>> warning:_NclOpenFile: Can not open file </.../.../merra2/MERRA2_200.tavgM_3d_cld_Np.199902.nc4.nc>; file format not supported or file is corrupted
>
The ncl_filedump output is like this:
Variable: f
Type: file
filename: MERRA2_400.tavgM_3d_cld_Np.201112.nc4
path: /.../MERRA2_400.tavgM_3d_cld_Np.201112.nc4.nc
file global attributes:
History : Original file generated: Sat Jul 4 21:58:25 2015 GMT
Filename : MERRA2_400.tavgM_3d_cld_Np.201112.nc4
Comment : GMAO filename: d5124_m2_jan10.tavg3_3d_cld_Np.monthly.201112.nc4
Conventions : CF-1
Institution : NASA Global Modeling and Assimilation Office
References : http://gmao.gsfc.nasa.gov
Format : NetCDF-4/HDF-5
SpatialCoverage : global
VersionID : 5.12.4
TemporalRange : 1980-01-01 -> 2016-12-31
identifier_product_doi_authority : http://dx.doi.org/
ShortName : M2TMNPCLD
RangeBeginningDate : 2011-12-01
RangeEndingDate : 2011-12-31
GranuleID : MERRA2_400.tavgM_3d_cld_Np.201112.nc4
ProductionDateTime : Original file generated: Sat Jul 4 21:58:25 2015 GMT
LongName : MERRA2 tavg3_3d_cld_Np: 3d,3-Hourly,Time-Averaged,Pressure-Level,Assimilation,Cloud Diagnostics Monthly Mean
Title : MERRA2 tavg3_3d_cld_Np: 3d,3-Hourly,Time-Averaged,Pressure-Level,Assimilation,Cloud Diagnostics Monthly Mean
SouthernmostLatitude : -90.0
NorthernmostLatitude : 90.0
WesternmostLongitude : -180.0
EasternmostLongitude : 179.375
LatitudeResolution : 0.5
LongitudeResolution : 0.625
DataResolution : 0.5 x 0.625 (42 pressure levels)
Source : CVS tag: GEOSadas-5_12_4
Contact : http://gmao.gsfc.nasa.gov
identifier_product_doi : 10.5067/J9R0LXGH48JR
RangeBeginningTime : 00:00:00.000000
RangeEndingTime : 23:59:59.000000
DODS_EXTRA.Unlimited_Dimension : time
history : 2017-12-10 06:40:28 GMT Hyrax-1.13.4 https://goldsmr5.gesdisc.eosdis.nasa.gov:443/opendap/MERRA2_MONTHLY/M2TMNPCLD.5.12.4/2011/MERRA2_400.tavgM_3d_cld_Np.201112.nc4.nc?CLOUD[0:0][0:41][0:360][0:575],time,lev,lat[0:360],lon[0:575]
dimensions:
time = 1
lev = 42
lat = 361
lon = 576
variables:
float CLOUD ( time, lev, lat, lon )
long_name : cloud_fraction_for_radiation
units : 1
_FillValue : 1e+15
missing_value : 1e+15
fmissing_value : 1e+15
vmax : 1e+15
vmin : -1e+15
valid_range : ( -1e+15, 1e+15 )
origname : CLOUD
fullnamepath : /CLOUD
double lat ( lat )
CLASS : DIMENSION_SCALE
NAME : lat
long_name : latitude
units : degrees_north
vmax : 1e+15
vmin : -1e+15
valid_range : ( -1e+15, 1e+15 )
origname : lat
fullnamepath : /lat
double lev ( lev )
CLASS : DIMENSION_SCALE
NAME : lev
long_name : vertical level
units : hPa
positive : down
vmax : 1e+15
vmin : -1e+15
valid_range : ( -1e+15, 1e+15 )
origname : lev
fullnamepath : /lev
double lon ( lon )
CLASS : DIMENSION_SCALE
NAME : lon
long_name : longitude
units : degrees_east
vmax : 1e+15
vmin : -1e+15
valid_range : ( -1e+15, 1e+15 )
origname : lon
fullnamepath : /lon
integer time ( time )
CLASS : DIMENSION_SCALE
NAME : time
long_name : time
units : minutes since 2011-12-01 01:30:00
time_increment : 60000
begin_date : 20111201
begin_time : 13000
vmax : 1e+15
vmin : -1e+15
valid_range : ( -1e+15, 1e+15 )
origname : time
fullnamepath : /time
Thanks,
Xinyue
> On Dec 22, 2017, at 19:16, Karin Meier-Fleischer via ncl-talk <ncl-talk at ucar.edu> wrote:
>
> Hi Xinyue,
>
> please, send the output of ncl_filedump from MERRA2_200.tavgM_3d_cld_Np.199902.nc4.nc
>
> -Karin
>
>
> Am 22.12.17 um 10:16 schrieb Wang Xinyue via ncl-talk:
>> Hi there,
>>
>> I met with a problem in reading nc files.
>> I can use the following commands to read NCEP datasets:
>>
>> fils = systemfunc("ls /.../.../ncep/omega/*.nc”)
>> f = addfiles(fils, "r”)
>>
>> But when I use the same commands to read ERA-I datasets and MERRA2 datasets, it warned like this:
>>
>> warning:_NclOpenFile: Can not open file </.../.../merra2/MERRA2_200.tavgM_3d_cld_Np.199902.nc4.nc>; file format not supported or file is corrupted
>>
>> Is anyone there had similar experience before? And how did you fix it?
>>
>> Looking forward to your reply.
>>
>> Thanks,
>> Xinyue
>>
>>
>>
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>
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