Teleconference 30.4.2020

Agenda

1. Short communication regarding GitHub
2. Review of GRIB proposals.
3. Review of BUFR proposals.
4. Review of Common Code Tables proposals.
5. Next teleconference.
6. AOBS

Summary

The team reviewed the following issues.

GRIB2

Submitted

1. Composite local time in GRIB message Introduction by Sebastien explaining that the purpose is to initiate the discussion and to seek consensus on proceeding and agreement that there is interest for it. Opinion of the team is that it is worth to explore. This is going to In progress.
2. New type of Level: departure level of most unstable parcel of air Introduction by Sebastien. There are several comments and there is interest for the proposed new level. In validation.
3. GRIB2 template 4.82 in v25.0.0 Agreed the proposal by Jeff Ator as reported in the issue. Using the status column in the tables to communicate that the template is “raccomended to use ... instead”. We should also try to communicate this to the users. We should do the same for other templates in similar situations. It is going in validation.
4. GRIB2 code/flag tables in v25.0.0 Just an editorial change going in review.
5. incorrect units of "Potential evaporation rate" in Code Table 4.2 Similar as #14 . Possible conflict of 122 with another proposal. In validation.
6. clarify 4.2 Direction of Combined Wind Waves and Swell Agreement on the proposed change and in validation.
7. New GRIB table entry for describing probability Consider this to be validated. No need to produced samples. It is using a known template with an extra entry in the table already used. Going in validation to finalise the proposal.
8. New GRIB2 Code Table 4.2 entries for the physical atmospheric properties of seeing and sky transparency The proposal is approved for validation. There are notes describing the parameters. For the moment they will be reported as notes, but in the future we are going to include the description. Action on Secretariat to analyse the possibility of adding a description column. In validation only to check that the codes are available.
9. New parameters in Code Table 4.2 for Fire weather Forecasting Approved for validation. Descriptions are proposed. It is desirable that parameters are described, but there is also the conflicting need to avoid to have too much information in the pdf files. The second parameter proposed is also expressing the valid range for the variable that is not an optional information, but a mandatory description needed to properly encode and decode the parameter.
10. convective rain and snow specific water content in Code Table 4.2 Parameter names accepted as proposed. In validation. No need to provide samples, need to check the code numbers.
11. New entries in Code Table 4.238 Approve the proposal deleting the notes. In validation without samples.

In progress

12. A product definition template for statistics over an ensemble

In validation

13. Representing gnomonic grids
14. New Table 4.2 entries proposed by Canada
15. New GRIB2 code Table 4.2 entries requested by Norway

BUFR4

Submitted

1. Add perturbed forecast in table 0-01-092 Proposal approved for validation without any change. No need of samples.
2. New BUFR sequence for tropical cyclone tracks Proposal approved for validation. A table D descriptor has to be allocated to the sequence. The sequence will go in validation. ECMWF will start distributing the product with the explicit sequence and in parallel a validation of the sequence with a table D descriptor will proceed with the aim to validate by end of the year.
3. Table D sequence for reporting trajectory profile data from marine animal tags Presented by David Berry. Accepted for validation. Some more work needed with the community. Sample data and validation is expected.
4. New Table D sequence for reporting observations from ocean gliders Introduced by David Berry. Accepted for validation. Samples to be provided.
5. New table B descriptor for a sensor identifier The team discussed the possible use of “platform transmitter id number”, but the consensus was that a new table B element is a better solution. Approved for validation as proposed.
6. New Sequence and descriptors for GNSS Slant Total Delay BUFR
7. new entries in BUFR flag table 0-33-066
8. New BUFR Table B and D descriptors for scatterometer data
9. Proposal for new BUFR table entries for Sentinel-6 Michael Freilich
10. Table D sequence for reporting scatterometer data from CFOSAT
11. New BUFR sequences for encoding IKFS2 products
12. Correct clerical error in BUFR Table B entry 0-40-063

In validation

13. Additional bio-geochemical sequences for data from Argo profiling floats
14. Table D sequence for reporting marine observations from unmanned surface vehicles

Common Code Tables

Submitted

1. Add 3 new entries to C-2 for radiosondes of China
2. Add a new entry to Common Code Tables C-11 to identify IAP
3. New sub-category for TC tracks from deterministic
4. new CCT C-1/11, C-5 and C-8 entries for commercial providers of radio occultation data
5. Amendment to Common Code table C-3 by Japan
6. New sub-category for Mode-S in C-13
7. Proposal for new entries in Common Code Tables C5 and C8
8. Proposal for new entry in Common Code Tables C5
9. add new chemical species, aerosols and pollen in Common Code Table 14