[ncl-talk] To get the mean Latitude

[Dennis Shea]

  psi(lat,lon)     ;      [lat | 151] x [lon | 1441]; dimension numbers 0, 1

  psiMean = *dim_avg_n_Wrap*
<http://www.ncl.ucar.edu/Document/Functions/Contributed/dim_avg_n_Wrap.shtml>(psi,
0)
  printVarSummary(psiMean)                 ; psiMean(lon) ==> psiMean(1441)

 wks =

 resxy = True

       :

  plt_psiMean = *gsn_csm_xy*
<http://www.ncl.ucar.edu/Document/Graphics/Interfaces/gsn_csm_xy.shtml>(wks,
lon, psiMean, resxy)

On Mon, Jul 19, 2021 at 3:41 AM Chathurika via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> Dear All,
>
>
> I have the barotropic streamfunction values in the southern ocean
> (attached figure). I want to get the mean latitude (ACC core) at each
> longitude. And plot the data as Latitude longitude contour plot using one
> contour line. I am bit lost about how can I do this. It would be great if
> you can give me some ideas about getting the mean Latitudes for each and
> every longitude.
>
>
> Print summary for the data set:
>
> Type: float
>
> Total Size: 870364 bytes
>
>             217591 values
>
> Number of Dimensions: 2
>
> Dimensions and sizes: [lat | 151] x [lon | 1441]
>
> Coordinates:
>
>             lat: [ -35..-72.5]
>
>             lon: [-180.. 180]
>
> Number Of Attributes: 12
>
>   _FillValue : 1e+20
>
>   standard_name : ocean_barotropic_mass_streamfunction
>
>   long_name : Ocean Barotropic Mass Streamfunction
>
>   comment : Streamfunction or its approximation for free surface models.
> See OMDP document for details.
>
>   units : kg s-1
>
>   original_name : msftbarot
>
>   cell_methods : area: mean where sea time: mean
>
>   cell_measures : area: areacello
>
>   history : 2019-08-25T07:38:10Z altered by CMOR: replaced missing value
> flag (-9e+33) and corresponding data with standard missing value (1e+20).
>
>   remap : remapped via ESMF_regrid_with_weights: Bilinear
>
>   average_op_ncl : dim_avg_n over dimension(s): time
>
>   missing_value : 1e+20
>
> Millions of thanks and best regards,
>
> Chathu
>
> ------------------------------
>
>
>
> Wickramage Chathurika Hemamali
> Msc in Physical Oceanography
> State Key Laboratory of Tropical Oceanography
> South China Sea Institute of Oceanology
> University of Chinese Academy of Science
> China
>
> *Specialized in Oceanography and Marine Geology (Bachelor)*
> *University of Ruhuna*
> *Matara*
> *Sri Lanka*
>
> Email : wickramagechathurika at rocketmail.com
> chatu at scsio.ac.cn
>
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