New Fire parameters in Code Table 4.2, discipline 2, category 4 Fire weather products

[sebvi]

Initial request

ECMWF is requesting additional entries in Code Table 4.2 discipline 2, category 4 Fire weather product to complement the existing list of available parameters.

Amendment details

ADD in Code Table 4.2, discipline 2, category 4	Code	Variable	Description	Units
20	Burned Fraction	The  proportion of a grid box burned by a fire	fraction [0-1]
21 20	Burning area	The proportion of a grid box with an active fire	%
22 21	Burnable area	The proportion of a grid box which could potentially burn	%
23 22	Un-burnable area	The proportion of a grid box which can't burn	%
24 23	Fuel load	Total biomass of combustable material	kg m**2
25 24	Combustion Completeness	combustion completeness= fraction of fuel load combusted during a fire	%
26 25	Fuel moisture content	kg of water /kg of biomass	kg kg**-1

Comments

No response

Requestor(s)

Francesca Di Giuseppe, Sebastien Villaume (ECMWF)

Stakeholder(s)

Enter list of stakeholder(s).

Publication(s)

Manual on Codes (WMO-No. 306), Volume I.2, GRIB code table 4.2, discipline 2, category 4 (new entries)

Expected impact of change

MEDIUM

Collaborators

No response

References

No response

Validation

No response

[amilan17]

https://github.com/wmo-im/CCT/wiki/Teleconference-5.10.2022 meeting notes:

• change units to percentage; use existing code (3) instead of 20
• first @sebvi will ask researcher to confirm that it's the same parameter, if they could be labeled with a specific model (not recommended) and/or could they use other existing parameters
• if keeping "fraction" change word to "proportion"

[amilan17]

https://github.com/wmo-im/CCT/wiki/Teleconference-1-and-2.11.2022 notes:

still in progress

[amilan17]

https://github.com/wmo-im/CCT/wiki/Teleconference-21.11.2022 notes: (@sebvi) the researcher said that these parameters are generic and common and are not specific to a particular model

@sebvi will ask if "(vegetation)" is critical for description and then update branch.

[amilan17]

https://github.com/wmo-im/CCT/wiki/Teleconference-12-and-13.12.2022 notes:

@sebvi will change units to "percentage", remove code 20, because it's the same as code 3 "fire burned area" and change "fraction" in the names to "area"

@jbathegit will review when ready

[amilan17]

@jbathegit I updated the branch for @sebvi

[jbathegit]

I looked at the branch and the updates to CT 4.2 look fine.

However, I noted that there was also a change to template 4.91 included in the branch - did you mean to include that as well?

[amilan17]

@jbathegit good catch, that change is actually related to issue #166, technically it should be in a separate branch, but it's so minor, I don't think it will be fine as is.

[sebvi]

@jbathegit sorry it was a mistake on my side. As @amilan17 pointed it out the changes for 4.91 is meant to satisfy the decision in #166

[amilan17]

https://github.com/wmo-im/CCT/wiki/Teleconference-10.01.2023 notes:

@amilan17 and @marijanacrepulja  check consistency