Open sebvi opened 1 month ago
https://github.com/wmo-im/CCT/wiki/Teleconference.16.May.2024 notes: Sebastien introduced the proposal; Sibylle commented that there should always be two bytes;
https://github.com/wmo-im/CCT/wiki/Teleconference.16.May.2024 notes: available for discussion probably for next fast-track;
we have an ecCodes branch if someone is interested to test our proposed implementation and give feedback on this: feature/ft2024-2_255
Initial request
ECMWF is interested in storing verification scores in GRIB2 in a near future.
With the existing GRIB2 templates, it is not possible to properly encode verification scores. The following templates are a proposal of how verification scores could be encoded in GRIB2.
We are not aiming to get this validated for FT 2024-2, we would like to start the discussion and eventually get it as experimental so that we can refine the proposal.
Amendment details
Note: The entries 7,8,9,10,11 and 12 need a threshold. The number of additional keys is equal to the number of arguments specified for the code number set regarding table 4.122 in the key ‘Kind of additional arguments for verification score’. For entries 11 and 12 and ensemble template must be used to define the total number of members and n.
Note: For #1: NA =1 or 2 with one scale factor / scaled value for a fixed threshold value if ‘type of limit for verification score’ includes only one value otherwise 2 for lower / upper limit
For #2: NA=1 or 2 1st tuple of scale factor / scaled value defined the total number of quantiles / 2nd tuple the quantile value if ‘type of limit for verification score’ includes only one value otherwise 4 for lower quantile / upper quantile
For #3: NA=1or 2 with scale factor / scaled value specifying the factor of standard deviation of the climatology if ‘type of limit for verification score’ includes only one value otherwise 2 for lower / upper limit
Comments
No response
Requestor(s)
Sebastien Villaume (ECMWF) Robert Osinski (ECMWF)
Stakeholder(s)
ECMWF
Publication(s)
Manual on Code: new templates for section 4 Manual on Code: new tables and new entries in code Table 4.2
Expected impact of change
None
Collaborators
No response
References
No response
Validation
No response