...
- centre : the 4-letter WMO identifier of the originating centre (ammc, cwao, ecmf, edzw, egrr, kwbc, lfpw, rjtd, rksl, rums etc);
- model : free model identifier assigned by the centre (to distinguish between potentially different models provided by the centre);
- par : denotes the parameter and level of the verified field and can have the following forms:
- for upper-air fields (eg. z500hPa, t850hPa, w250hPa) it has the form PL <P><L> where
- P <P> is the parameter (z for geopotential height, t for temperature, w for wind, r for relative humidity)
- L <L> is the pressure of the isobaric level in hPa and the string hPa
- for the mean-sea-level pressure it is mslp;
- for upper-air fields (eg. z500hPa, t850hPa, w250hPa) it has the form PL <P><L> where
- sc : is the score abbreviation:
- rmse for root-mean-square error
- me for mean error (bias)
- mae for mean absolute error
- s1 ("S ONE") for S1 skill score
- ccaf for forecast anomaly correlation
- cctf for forecast tendency correlation
- rmsaf for root-mean-square of forecast anomaly
- rmsav for root-mean-square of verifying analysis anomaly
- seeps for SEEPS
- sd for standard deviation of field
- dom : is the domain name, one of the following: nhem shem tropics eurnafr namer asia austnz npol spol;
- ref : indicated whether the scores have been computed against the analysis (ref=an) or observations (ref=ob);
- refs : reference subtype (reserved, currently not in use);
- d : day of the forecast validity in the form YYYYMMDD or month of the mean in the form YYYYMM;
- t : time of the forecast validity in hours of UTC;
- s : forecast step in hours;
- n : number of observations used to compute the given score (if applicable); for monthly means this should be the average number of observation per observation time;
- v : score value; it can be of any usual numeric format (3, 3., 3.0, 0.3E+1,...) but without any leading zeroes (
003); the number of significant digits must be sufficient to ensure description of natural score variability between forecast steps, seasons or different centres; if the value is not available the record either should not be printed at all or the value should be set to NIL (v=nil); every record must contain the key v (value of key v is not inheritable from previous record).
Order of key=value pairs is not significant; new keys can be added in future. Case of characters is insignificant, but it should be kept lower-case. Everything Any text following the hash sign # till until the end of the line is ignored.
Units of values
Values should be of units following the definitions of scores in the WMO-CBS document on the updated standard verification system.
score | parameter | unit |
---|---|---|
correlation coefficient(ccaf, cctf) | all | 1. |
mean error, rms error, mean absolute error, rms anomaly, standard deviation | geopotential height | m |
temperature | K | |
mean sea-level pressure | hPa | |
wind | m/s | |
relative humidity | 1. | |
S1 score | mean sea-level pressure | % |
Example
Code Block |
---|
# a sample bulletin with daily values, compressed by removing # redundant (repeated) key=value pairs centre=ecmf,par=z500hpa,sc=rmse,dom=nhem,ref=an,d=20110101,t=0,s=24,v=9.8 s=48,v=12.0 t=12,s=24,v=9.9 s=48,v=12.3 ref=ob,t=0,s=24,n=204,v=13.8 s=48,v=19.0 t=12,s=24,v=13.6 s=48,v=20.03 |
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