[ncl-talk] ECMWF variable: field values and geophysical contour position

[Dennis Shea]

[1] From an NCL perspective, there is *no need *to convert the Grib file to
netCDF. Read the Grib file directly within an NCL script.

  dirg   = "/Volumes/MyPassport/harmonie/Ophelia/output/"
  filg    = "fc2017100612+006.grb"
  pthg  = dirg+filg
  fg     = *addfile*(pthg,"r")
 ;print(fg)    ; same as:   ncl_filedump fc2017100612+006.grb

;---Extract desired variable


*  varName = "SHTFL_GDS3_HTGL_acc6h"  x     = fg->$varName$*


[2] As with WRF data which you used before, variable on curvilinear grids
must use

     x at lat2d = ....
     x at lon2d = ...

     See attached.

============
[3] If for some reason you want the *whole file* converted to netCDF, use:

*%>* *ncl_convert2nc*
<https://www.ncl.ucar.edu/Document/Tools/ncl_convert2nc.shtml>
fc2017100612+006.grb

If you want an explicit 'time' dimension, add the 'itime' option

*%>* *ncl_convert2nc*
<https://www.ncl.ucar.edu/Document/Tools/ncl_convert2nc.shtml>
fc2017100612+006.grb *-itime*


[3] If you want selected variable subset use:

%> *ncl_convert2nc *fc2017100612+006.grb -*v
SHTFL_GDS3_HTGL_acc6h,g3_lat_0,g3_lon_1*

On Wed, Mar 6, 2019 at 9:32 AM Lara Quitián Hernández <
laraquitianhernandez at gmail.com> wrote:

> Hi,
>
> Of course, I send you the file.
>
> I'm thinking that maybe the problem is the wrong conversion from the grib
> file to the NetCDF file.
> So, I also send you the grib file and the script I have used to carry out
> that conversion.
>
> Thank you so much.
>
> Regards,
> Lara
>
>  fc2017100612+006.grb
> <https://drive.google.com/file/d/1orn2uzzyLyndUkwENHHBypjAQw18u4uN/view?usp=drive_web>
>  fc2017100612+006.nc
> <https://drive.google.com/file/d/1Df6twhGWbE5jcdeIzMBROhOaEIDonmBh/view?usp=drive_web>
>
> El mié., 6 mar. 2019 a las 17:23, Rick Brownrigg (<brownrig at ucar.edu>)
> escribió:
>
>> Hi,
>>
>> Its really difficult to say, based upon the information available. What
>> makes you say the map is not correctly registered?  Are you able to send me
>> you data set?
>>
>> Rick
>>
>>
>> On Wed, Mar 6, 2019 at 9:17 AM Lara Quitián Hernández <
>> laraquitianhernandez at gmail.com> wrote:
>>
>>> Good afternoon,
>>>
>>> I'm trying to plot a NetCDF ECMWF variable (surface heat flux), but I
>>> am obtaining the field values and geophysical contours situated in
>>> different places. I have tried to modify the projection and other
>>> map issues, but I'm not able to fix it.
>>>
>>> ¿Could anyone help me?
>>>
>>> I enclose the obtained figure and a summary of the variable's info.
>>>
>>> Thanks in advance.
>>>
>>> Best regards,
>>> Lara
>>>
>>> [image: Captura de pantalla 2019-03-06 a las 17.13.46.png]
>>> [image: SHF2_Ophelia_10-06-2017(12+)_3.png]
>>>
>>> --
>>>
>>>
>>> *Lara Quitián Hernández, PhD Student*
>>> Department of Earth Physics and Astrophysics
>>> Faculty of Physical Sciences
>>> Ciudad Universitaria, Plaza Ciencias, 1
>>> 28040 Madrid. Spain
>>> Email: lquitian at ucm.es <mlunar at aemet.es>
>>>
>>> _______________________________________________
>>> ncl-talk mailing list
>>> ncl-talk at ucar.edu
>>> List instructions, subscriber options, unsubscribe:
>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>
>>
>
> --
>
>
> *Lara Quitián Hernández, PhD Student*
> Department of Earth Physics and Astrophysics
> Faculty of Physical Sciences
> Ciudad Universitaria, Plaza Ciencias, 1
> 28040 Madrid. Spain
> Email: lquitian at ucm.es <mlunar at aemet.es>
>
> _______________________________________________
> ncl-talk mailing list
> ncl-talk at ucar.edu
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>
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