===== This is the data description for the contents of WACCM-data-Syowa-study.tar
===== by P.T.Verronen, 3rd of March, 2025

=== Files are either in Matlab or Net-CDF format.

=== The file with 30-minute data (.mat), at the Syowa ground-station location.

WACCM_ApEEP_simulation = 

  struct with fields:

        CO_mixing_ratio: [26x105216 double] ppv = molecules/molecules
     U_zonal_wind_speed: [26x105216 double] m/s
          Temperature_K: [26x105216 double] Kelvin
    EEP_ionization_rate: [26x105216 double] ions/(cm3 s)
         pressure_level: [26x1 double]      hPa
          date_YYYYMMDD: [105216x1 double]  
     seconds_of_the_day: [105216x1 double]
        NO_mixing_ratio: [26x105216 double] ppv = molecules/molecules
           latitude_deg: -69.2670
          longitude_deg: 40.00

WACCM_Arase_simulation = 

  struct with fields:

        pressure_level: [26x1 double]    hPa
         date_YYYYMMDD: [8831x1 double]
    seconds_of_the_day: [8831x1 double]
       NO_mixing_ratio: [26x8831 double] ppv = molecules/molecules
          latitude_deg: -69.2670
         longitude_deg: 40.00

=== Files with daily output data (.nc, in .tgz), on a latitude-longitude grid:

dimensions:
        time = UNLIMITED ; // (10 currently)
        lev = 20 ;
        lat = 96 ;
        lon = 288 ;
variables:
        float CO(time, lev, lat, lon) ;
                CO:mdims = 1 ;
                CO:units = "mol/mol" ;
                CO:mixing_ratio = "dry" ;
                CO:long_name = "CO concentration" ;
                CO:cell_methods = "time: mean" ;
        float T(time, lev, lat, lon) ;
                T:mdims = 1 ;
                T:units = "K" ;
                T:long_name = "Temperature" ;
                T:cell_methods = "time: mean" ;
        double lat(lat) ;
                lat:_FillValue = -900. ;
                lat:long_name = "latitude" ;
                lat:units = "degrees_north" ;
        double lev(lev) ;
                lev:long_name = "hybrid level at midpoints (1000*(A+B))" ;
                lev:units = "hPa" ;
                lev:positive = "down" ;
                lev:standard_name = "atmosphere_hybrid_sigma_pressure_coordinate" ;
                lev:formula_terms = "a: hyam b: hybm p0: P0 ps: PS" ;
        double lon(lon) ;
                lon:_FillValue = -900. ;
                lon:long_name = "longitude" ;
                lon:units = "degrees_east" ;
        double time(time) ;
                time:long_name = "time" ;
                time:units = "days since 2000-01-01 00:00:00" ;
                time:calendar = "gregorian" ;
                time:bounds = "time_bnds" ;