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A record has the following format:
| centre=centre, model=model_id, d=yyyymm, t=time, s=forecast_step, st=station_id, lat=latitude, lon=longitude, lam=model_grid_latitude, lom=model_grid_longitude, se=station_elevation, me=model_orography_elevation, par=parameter, sc=score, th=event_thresholds, n=sample_size, v=score_value |
If the value of any key is unknown it is encoded as "na". However, every record has to have a valid score_value (the "v" key); if the value is not known such record should not be included in the data file.
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| Code Block |
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centre=ecmf,model=hr_0001,d=201602,t=000,s=0,st=97146,lat=-4.1,lon=122.43,lam=-4.147,lom=122.484,se=50,me=163,par=tcc,sc=ct,th=2/6,v=0/0/0/0/0/7/0/0/21 t=3,s=3,v=0/0/0/0/0/4/0/0/24 t=6,s=6,v=0/0/0/0/0/2/0/0/26 t=12,s=12,v=0/0/0/0/0/6/0/0/22 t=15,s=15,v=0/0/0/0/0/3/0/0/25 t=18,s=18,v=0/0/0/0/0/4/0/0/24 t=000,s=0,sc=mae,th=na,v=60.92 t=3,s=3,v=59.92 t=6,s=6,v=62.01 t=12,s=12,v=60.59 t=15,s=15,v=59.81 t=18,s=18,v=62.08 t=000,s=0,sc=me,v=-60.92 t=3,s=3,v=-59.92 t=6,s=6,v=-62.01 t=9,s=9,n=26,v=-66.37 ... |
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 is the latitude of the model grid point used to extract the forecast at the observation location (*);
- model_grid_longitude 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:
Include Page List of parameters List of parameters
- score is the name of the verification score or statistic:
| score | description | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| me | mean error (bias) | ||||||||||||||||||||||||||||
| mae | mean absolute error | ||||||||||||||||||||||||||||
| rmse | root mean square error | ||||||||||||||||||||||||||||
| ct | contingency table values, The rank of a contingency table is defined by number of values in the key event_thresholds
NB. Please note how those contingency tables are constructed.
but following the definition of 2x2 contingency table on the left the table should be
|
v=C/A/D/B | |||||||||||||||||||||||||||
v=G/D/A/H/E/B/I/F/C | |||||||||||||||||||||||||||||
v=M/I/E/A/N/J/F/B/O/K/G/C/P/L/H/D |
- event_thresholds is a value or values of threshold(s) defining events for contingency tables; number of values in event_thresholds defines the rank of the contingency table; multiple values are separated by a forward slash /
| event_threshold | description |
|---|---|
| 15 | threshold for a 2x2 contingency table, e.g. if par=ff10m this is an event of 10m wind speed |
| 5/10/15 | thresholds for a 4x4 contingency table for 10m wind speed |
- sample_size is number of observations used to compute the monthly mean at the given station;
- score_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 nxn contingency table these are the n2 values delimited by forward slashes (see the score table above); if possible, the value should be printed using the printf string format specifier "g" (or equivalent).
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