Code Table 4.2 : new fire parameters

[sebvi]

Initial request

ECMWF is requesting new fire parameters for its global emergency fire forecasting service.

Amendment details

ADD new entries in Code table 4.2, discipline 2, category 4

Name	code	units	Comment/definition
live leaf fuel load	27	kgm-2	amount of biomass fro live leaves
live wood fuel load	28	kgm-2	amount of biomass from woody components
dead leaf fuel load	29	kgm-2	amount of biomass from dead leaves
dead wood fuel load	30	kgm-2	amount of biomass from dead woody components
live fuel moisture content	31	kgkg-1	amount of water per amount of mass in live vegetation
fine dead leaf moisture content	32	kgkg-1	Amount of water per amount of mass in fine dead leaf fuel bed. These fuels include herbaceous plants and leaf litter. Fine dead leaf is classified as a 1-h fuel in the Nelson model as moisture responds on hourly timescales to atmospheric conditions. Typical diameter is 0.2 cm. Values range between 0.01 and 0.8.
dense dead leaf moisture content	33	kgkg-1	Amount of water per amount of mass in dense dead leaf fuel bed. These fuels include herbaceous plants and small sticks. Dense dead leaf is classified as a 10-h fuel in the Nelson model as moisture responds on sub-daily timescales to atmospheric conditions. Typical diameter is 0.6 cm. Values range between 0.01 and 0.6.
fine dead wood moisture content	34	kgkg-1	Amount of water per amount of mass in fine dead wood fuel bed. These fuels include large sticks and logs. Fine dead wood is classified as a 100-h fuel in the Nelson model as moisture responds on daily-to-weekly timescales to atmospheric conditions. Typical diameter is 2.0 cm. Values range between 0.01 and 0.5.
dense dead wood moisture content	35	kgkg-1	Amount of water per amount of mass in dense dead wood fuel bed. These fuels include fallen trees and large logs. Dense dead wood is classified as a 1000-h fuel in the Nelson model as moisture responds on monthly timescales to atmospheric conditions. Typical diameter is 6.0 cm. Values range between 0.01 and 0.4.

Comments

No response

Requestor(s)

Sebastien Villaume (ECMWF)

Stakeholder(s)

ECMWF

Publication(s)

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

Expected impact of change

None

Collaborators

No response

References

No response

Validation

No response

[amilan17]

https://github.com/wmo-im/CCT/wiki/Teleconference.6.7.June.2023 notes:

@sebvi update branch;

[sebvi]

branch updated

[amilan17]

https://github.com/wmo-im/CCT/wiki/Teleconference.13.July.2023 notes:

ready