[ncl-talk] To get the mean Latitude

[Chathurika]

Dear Dennis,




Millions of thanks for the reply. 




But I want to know the mean latitude at each longitude point separately. If I use dim_avg_n_wrap, I cannot plot the latitude, longitude plot like in the attachment. 




Thank you so much again and best regards,

Chathu



-----Original Messages-----
From:"Dennis Shea" <shea at ucar.edu>
Sent Time:2021-07-23 02:28:13 (Friday)
To: Chathurika <chatu at scsio.ac.cn>
Cc: ncl-talk <ncl-talk at ucar.edu>
Subject: Re: [ncl-talk] To get the mean Latitude


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



  psiMean = dim_avg_n_Wrap(psi, 0)

  printVarSummary(psiMean)                 ; psiMean(lon) ==> psiMean(1441)


 wks =

 resxy = True


       :




  plt_psiMean = gsn_csm_xy(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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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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