[ncl-talk] Era-Interim daily precipitation

[Ehsan Taghizadeh]

 Dears,About summation of 12 hours precipitation to obtain daily precipitation, as suggested me I used "cdo" and it seems work correctly:"cdo -b F32 -f nc4c -z zip timselsum,2 2_2_ERAI_Prec_2015_Jan_00_12_12.nc 2_2_ERAI_Prec_2015_Jan_24_cdo.nc4"However I like to know how writing nc files with "Geo2D".
SincerelyEhsan

    On Thursday, May 31, 2018, 7:12:17 PM GMT+4:30, Ehsan Taghizadeh <ehsantaghizadeh at yahoo.com> wrote:  
 
  Thank you so much for your nice replies.With you comment, it seems work correctly. However I've added some changes to the script to have an output file same as input file, I mean about dimensions, attributes, and so on.However I have some difficulties about it and I'll be thankful if I could have your help, again.For example aboutfout->tp24_1!1 = tp!1fout->tp24_1!2 = tp!2I encountered error. It seems they have conflict with following lines:fout->latitude = fin->latitudefout->longitude = fin->longitude
Beside that I want to have "tp24_1" with dimension "Geo2D" to plot.I attached new version of script, and I'll be thankful if I hear from you.
SincerleyEhsan    On Thursday, May 31, 2018, 6:44:48 PM GMT+4:30, Dennis Shea <shea at ucar.edu> wrote:  
 
 The golden rule of  data processing is look at your data

You have:

tp=f->tp     ; <=== type 'short' [ packed data]

However, your file has:

      short tp ( time, latitude, longitude )
         scale_factor : 5.505649013956001e-06
         add_offset :   0.1803980955369768
         _FillValue :   -32767
         missing_value :        -32767
         units :        m
         long_name :    Total precipitation

You *MUST* unpack the variable before computing the sums.

tp = short2flt(f->tp)

printVarSummary(tp)
printMinMax(tp,0)

===
https://www.ncl.ucar.edu/Document/Functions/Contributed/short2flt.shtml

 




On Thu, May 31, 2018 at 7:19 AM, Ehsan Taghizadeh <ehsantaghizadeh at yahoo.com> wrote:

 Dears,
I've tried sum 12 hour precipitation to obtain 24 hour precipitation using attached script.However it seems doesn't work correctly!I had to sum tp(0,:,:)+tp(1,:,:), also tp(2,:,;)+tp(3,;,:), and so on.I uploaded "2_2_ERAI_Prec_2015_Jan_00_12_12.nc" in ftp.cgd.ucar.edu.I'll be thankful if I hear from you.
SincerelyEhsan
    On Wednesday, May 16, 2018, 8:23:32 AM GMT+4:30, Dennis Shea <shea at ucar.edu> wrote:  
 
 This is book keeping. Something like:

loop  each year
   loop each month
      loop each day
   
        sum all values occurring between 00:00 and 11:59 inclusive ==>PRC(time,lat,lon,0)
        sum all values occurring between 12:00 and 23:59 inclusive ==>PRC(time,lat,lon,1)

     end day
   end month
 end year


On Sun, May 13, 2018 at 9:07 AM, Ehsan Taghizadeh <ehsantaghizadeh at yahoo.com> wrote:

Hi every body;Could I have any help to get daily precipitation from Era-Interim, please?I mean, a way to sum "accumulated precipitation from 00:00 to 12:00" with "accumulated precipitation from 12:00 to 24:00"?
SincerelyEhsan
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