CDO

Hi Jyoti,

first, the files you uploaded are not the files you used above.

What would you expect when merging files with same time steps and same variable names. You'll get one entry for each file and cdo info shows you each entry which has the same time stamp.

cdo merge Ind_F_tas_WAS-44i_MIROC-MIROC5_historical_r1i1p1_SMHI-RCA4_v2_annual_1951-1970_degC.nc \
          Ind_F_tas_WAS-44i_MOHC-HadGEM2-ES_historical_r1i1p1_SMHI-RCA4_v2_annual_1951-1970_degC.nc \
          Ind_F_tas_WAS-44i_NCC-NorESM1-M_historical_r1i1p1_SMHI-RCA4_v2_annual_1951-1970_degC.nc \
          Ind_F_tas_WAS-44i_NOAA-GFDL-GFDL-ESM2M_historical_r1i1p1_IITM-RegCM4-4_v5_annual_1951-1970_degC.nc tt.nc

ncdump -h tt.nc
netcdf tt {
dimensions:
    time = UNLIMITED ; // (20 currently)
    lon = 59 ;
    lat = 60 ;
    sfc = 4 ;
variables:
    double time(time) ;
        time:standard_name = "time" ;
        time:long_name = "time" ;
        time:units = "days since 1970-01-01 00:00:00" ;
        time:calendar = "standard" ;
        time:axis = "T" ;
    double lon(lon) ;
        lon:standard_name = "longitude" ;
        lon:long_name = "lon" ;
        lon:units = "degrees_east" ;
        lon:axis = "X" ;
    double lat(lat) ;
        lat:standard_name = "latitude" ;
        lat:long_name = "lat" ;
        lat:units = "degrees_north" ;
        lat:axis = "Y" ;
    double sfc(sfc) ;
        sfc:long_name = "surface" ;
        sfc:axis = "Z" ;
    float tas(time, sfc, lat, lon) ;
        tas:long_name = "Near-surface mean temperature" ;
        tas:units = "?C" ;
        tas:_FillValue = -3.4e+38f ;
        tas:missing_value = -3.4e+38f ;
...

cdo infov tt.nc
    -1 :       Date     Time   Level Gridsize    Miss :     Minimum        Mean     Maximum : Parameter name
     1 : 1951-07-01 06:00:00       0     3540    2243 :     -21.068      20.200      27.523 : tas           
     2 : 1951-07-01 06:00:00       0     3540    2243 :     -21.728      19.979      28.120 : tas           
     3 : 1951-07-01 06:00:00       0     3540    2243 :     -21.388      19.675      26.671 : tas           
     4 : 1951-07-01 06:00:00       0     3540    2243 :     -15.773      18.488      26.334 : tas           
     5 : 1952-06-30 06:00:00       0     3540    2243 :     -22.388      21.006      28.255 : tas           
     6 : 1952-06-30 06:00:00       0     3540    2243 :     -20.444      20.092      27.842 : tas           
     7 : 1952-06-30 06:00:00       0     3540    2243 :     -22.260      19.228      26.658 : tas           
     8 : 1952-06-30 06:00:00       0     3540    2243 :     -16.368      18.730      27.555 : tas           
     9 : 1953-07-01 06:00:00       0     3540    2243 :     -20.078      20.310      26.957 : tas           
    10 : 1953-07-01 06:00:00       0     3540    2243 :     -21.441      20.503      28.553 : tas           
    11 : 1953-07-01 06:00:00       0     3540    2243 :     -22.824      19.099      26.249 : tas           
    12 : 1953-07-01 06:00:00       0     3540    2243 :     -16.072      18.260      26.819 : tas           
    13 : 1954-07-01 06:00:00       0     3540    2243 :     -20.610      19.456      26.819 : tas           
    14 : 1954-07-01 06:00:00       0     3540    2243 :     -21.556      20.315      28.088 : tas           
    15 : 1954-07-01 06:00:00       0     3540    2243 :     -22.776      19.479      26.415 : tas           
    16 : 1954-07-01 06:00:00       0     3540    2243 :     -15.928      18.412      26.513 : tas           
    17 : 1955-07-01 06:00:00       0     3540    2243 :     -22.368      19.980      27.471 : tas           
    18 : 1955-07-01 06:00:00       0     3540    2243 :     -21.815      19.941      28.315 : tas           
    19 : 1955-07-01 06:00:00       0     3540    2243 :     -22.497      19.710      26.628 : tas           
    20 : 1955-07-01 06:00:00       0     3540    2243 :     -15.565      18.378      25.957 : tas           
    21 : 1956-06-30 06:00:00       0     3540    2243 :     -21.336      20.485      28.081 : tas           
    22 : 1956-06-30 06:00:00       0     3540    2243 :     -22.826      19.722      27.417 : tas           
    23 : 1956-06-30 06:00:00       0     3540    2243 :     -22.962      19.752      26.892 : tas           
    24 : 1956-06-30 06:00:00       0     3540    2243 :     -16.016      18.436      26.353 : tas
    ...    

Hi
Thanks for the reply. But I need the average of all the files on the same grid and on the same timesteps(as all the timesteps are same in files), so I used the merge command and merged all the files which I attached. So find me a way how to merge time to a single file with same timesteps.

Thanks.

If I understood correctly then why don't you try this

cdo ensmean file01.nc file02.nc file03.nc file04.nc output.nc

-Kunal Bali

Hi
Thanks ,Its works fine.

Kunal is right. I didn't get it yesterday, sorry.

Mine one is also not working properly and that’s why I’m here to seek some guidance. I can gladly say that I got the best https://youressayreviews.com/is-edubirdie-legit/ article to solve my problem because when I checked your blog’s comment section I got massive solutions to my problem. So thank you very much Jyoti Lodha for sharing this blog.

When the merge operator file is not working properly, it can be frustrating. Firstly, check the syntax of your merge operation to ensure it's correct. If the syntax is correct and it's still not working, try restarting the application or the system you're working on. Sometimes, a simple restart can resolve such issues more on that here https://www.linkedin.com/pulse/best-summary-generator-top-12-ai-text-summarizing-tools-nayeli-ellen-k7alf. If the problem persists, consider reaching out to the software's support team or community forums for assistance.