data-format and naming-conventions

data are in netCDF format with the following properties 

  • global grid,  lat/lon array begins at 180°W und 90°N
  • required variables
    1. <variable_name>:long_name = <"short desciption">
    2. <variable_name>:standard_name = <"CF_NAME">
    3. <variable_name>:units = <"unit">
      • if not known use "unknown"
      • if non-existent use "none"
    4. <variable_name>:code = <"code-number">
      • only if a code-number to the variable exists

 

data name: names are designed to describe the data content

(5 naming elements are separated by double underlines "__")

 

<dataset>__<version>__<property>__<Res>__<time>.nc

 

  • variables are to be described as follows:
    1. <dataset>:data-set/sensor name (e.g. MODIS)
    2. <version>: data-set version (e.g. TERRA, collection 5)
    3. <property>::variable-name (e.g AOD) use CF-names!
    4. <Res>:resolution (e.g 1.0x1.0 lat/lon)
    5. <time>: specify time-period (e.g. MMYYYY-MMYYYY)
                                  "dd"-day, "mm" - month, "yyyy" - year
                                  "9999" as year is the multi-annual avg.

  • examples for different time series:
         1.   <d>__<v>__<p>__<R>__<yyyy>-<yyyy>.nc
         2.   <d>__<v>__<p>__<R>__<yyyymm>-<yyyymm>.nc
         3.   <d>__<v>__<p>__<R>__<yyyymmdd>-<yyyymmdd>.nc
    samples
    -   NCEP__Reanalysis_I__LSM__1.25x1.25__1700-2009.nc
    -   JRA-25__VER__CSDLFsfc__1.25x1.25__197901-200902.nc
    -  
    ERA__Interim__TMP__1.5x1.5__19790101-20090320.nc

  • examples for special moments (e.g. day / monthly / year):
         1.   <d>__<v>__<p>__<R>__<yyyy>.nc
         2.   <d>__<v>__<p>__<R>__<yyyymm>.nc
         3.   <d>__<v>__<p>__<R>__<yyyymmdd>.nc
    samples
    -  
    NCEP__Reanalysis_I__LSM__1.25x1.25__1700.nc
    -  
    JRA-25__VER__CSDLFsfc__1.25x1.25__197901.nc
    -   ERA__Interim__TMP__1.5x1.5__19790101.nc