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ECMWF will be collecting and archiving the scores. Data will be exchanged in an ASCII-based format which is simple but flexible and is similar to the format used WMO exchange of upper-air scores. The format is defined here.
Data format
Data file consists of score values and corresponding metadata in an ASCII format.
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| Code Block |
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centre=ecmf,model=0001_fc,d=201410,t=0,s=24,st=11520,lat=50.02,lon=14.38,se=302,me=248,par=tp24,sc=me,ev=na,n=31,v=0.95 s=48,v=1.15 s=24,sc=ct,ev=val>5,v=1,16,12,2 s=48,v=3,13,11,4 |
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Values of keys
- centre (4-characters string) is the WMO identifier of the originating centre (ammc, cwao, ecmf, edzw, egrr, kwbc, lfpw, rjtd, rksl, rums etc);
model_id (a string, not containing a comma or vertical bar) is free model identifier assigned by the originating centre (to distinguish between potentially different models provided by the centre);
- yyyymm is the month of the mean, where yyyy is the year and mm is the month (01-12);
- time is the validity time (in hours UTC) of the forecasts verified;
- forecast_step is the length of the forecast (in hours);
- station_id (a number) is the WMO ID of the observation station verifying the forecasts;
- latitude is the latitude of the observation station verifying the forecasts;
- longitude is the longitude of the observation station verifying the forecasts;
- model_grid_latitude (non-mandatory) is the latitude of the model grid point used to extract the forecast at the observation location;
- model_grid_longitude (non-mandatory) is the longitude of the model grid point used to extract the forecast at the observation location;
- station_elevation is the elevation of the observation station above the mean sea level in meters;
- model_orography_elevation is the elevation of the model orography at the observation location;
- parameter is the verified model output parameter:
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- sample_size is number of observations used to compute the monthly mean at the given station;
- score_mean_value is the value or values of the score mean computed based on the forecast initiating at time time UTC, verifying in the month yyyymm, for the forecast length forecast_step hours; in case of contingency table these are the 4 values delimited by commas (see the score table above)
Procedures for exchange of data
Coming soon...