[ncl-talk] Extracting data for a given point from a model output
Setareh Rahimi
setareh.rahimi at gmail.com
Mon Dec 28 12:10:45 MST 2020
Dear Dennis,
Many thanks for your response. What I exactly mean is how to extract for
example "Temperature variable" value for a specific lat/lon from the output
result. For example: what is temperature value for a point at (lat=32, lon
52)?
Thanks again
Best wishes
On Mon, Dec 28, 2020 at 10:17 PM Dennis Shea <shea at ucar.edu> wrote:
> *getind_latlon2d *
> <https://www.ncl.ucar.edu/Document/Functions/Contributed/getind_latlon2d.shtml>
>
> A modification of Example 1
>
> f = *addfile* <https://www.ncl.ucar.edu/Document/Functions/Built-in/addfile.shtml>("Yazd-2019_DUST01.2019010100.nc" , "r")
> lat2d = f->xlat
> lon2d = f->xlon
>
> *printVarSummary* <https://www.ncl.ucar.edu/Document/Functions/Built-in/printVarSummary.shtml>(lat2d)
> *printMinMax* <https://www.ncl.ucar.edu/Document/Functions/Contributed/printMinMax.shtml>(lat2d, 0)
> *printMinMax* <https://www.ncl.ucar.edu/Document/Functions/Contributed/printMinMax.shtml>(lon2d, 0)
>
> lat = (/ 31.0 , 17.31, 24.05 /) ; user specified coordinate pairs
> lon = (/ -86.45,-101.00,-92.46 /)
> ; return 2d subscripts
> nm = *getind_latlon2d* (lat2d,lon2d, lat, lon)
>
> *print* <https://www.ncl.ucar.edu/Document/Functions/Built-in/print.shtml>(nm)
>
> X = f->mixrat ; (time, kz, iy, jx)
> Y = d->ddflx ; (time, iy, jx)
>
> nt = .... the index some specified time
>
> kl = ... index
>
> do k=0,*dimsizes* <https://www.ncl.ucar.edu/Document/Functions/Built-in/dimsizes.shtml>(lat)-1
> n = nm(k,0)
> m = nm(k,1)
>
> x = X(nt,kl,n,m)
> y = Y(nt,n,m)
>
> *print* <https://www.ncl.ucar.edu/Document/Functions/Built-in/print.shtml>(lat2d(n,m)+" "+lon2d(n,m)+" "+x+" "+y)
> end do
>
>
>
>
> On Mon, Dec 28, 2020 at 10:16 AM Setareh Rahimi via ncl-talk <
> ncl-talk at mailman.ucar.edu> wrote:
>
>> Dear all,
>>
>> I need to extract data (it could be any variable like temperature, wind
>> ...) for a specific point (say synoptic stations) at a specific day and
>> time
>> Yazd-2019_DUST01.2019010100.nc
>> <https://drive.google.com/file/d/105vU4Hx2sRjvWlsmRBKOxa97kXp8Cx1_/view?usp=drive_web>
>> ( Jan-03- 00:00 UTC), from a model output (file attached). I wonder how
>> it could be achieved using NCL (any example...) .
>>
>> I appreciate any suggestion,
>> Best wishes,
>> --
>> S.Rahimi
>>
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>
>
--
S.Rahimi
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