The C3S NetCDF encoding standards are used for the CERISE analysis data.  

Here only the differences from the C3S encoding standards are described.   

File Naming Conventions

Output Filename Conventions

  • <forecast_type> as it is defined in the controlled vocabulary of the global attributes (analysis type is added); 
  • <start_date_identifier> is a string "SYYYYMM" that describes the year and the month of the analysis data; 

An example of the above convention is:

lfpw_cerise-SystemName-v20210101_analysis_S202303_atmos_12hr_pressure_ta_r01i00p00.nc 

File Structure

  • Each netCDF4 file contains all the valid times within a single calendar month from a single variable and ensemble member.  

Global attributes

In the following table, only the differences from the C3S encoding standards are presented

Attribute Name

Value

forecast_type

"analysis"

forecast_reference_time

Not present


Time Coordinates

The table below describes the requirements for the time coordinates.  

Type

Coordinate Name

Dimension Names

Long name

double

reftime

Not present in analysis data 
doubleleadtimeNot present in analysis data 
doubletimetime"Valid time"


Data Variables

As described in Annex I (data variables) of the C3S encoding standards. 

In the analysis variables, "leadtime" dimension is replaced with "time" dimension.