Accounting approach | SCA | AFA | PA | PA13 (PA13i) | SCA19 | AFA19 | PA19 | |
---|---|---|---|---|---|---|---|---|
IPCC guidelines | 2006 Guidelines (Tier 1) | 2006 Guidelines (Tier 1) | 2006 Guidelines (Tier 1) | 2013 Guidance (Tier 2) | 2019 Refinement (Tier 1) | 2019 Refinement (Tier 1) | 2019 Refinement (Tier 1) | |
Considered HWPs | Sawnwood, wood-based panels, paper and paperboard, other industrial roundwood | Sawnwood, wood-based panels, paper and paperboard, other industrial roundwood | Sawnwood, wood-based panels, paper and paperboard, other industrial roundwood | Sawnwood, wood-based panels, paper and paperboard | Sawnwood, wood-based panels, paper and paperboard | Sawnwood, wood-based panels, paper and paperboard | Sawnwood, wood-based panels, paper and paperboard | |
HWP activity data | FAOSTAT | |||||||
Decay function | First-order decay function | |||||||
Half-life (years) | Sawnwood | 30 | 30 | 30 | 35 | 35 | 35 | 35 |
Wood-based panels | 30 | 30 | 30 | 25 | 25 | 25 | 25 | |
Paper and paperboard | 2 | 2 | 2 | 2 | 2 | 2 | 2 | |
Other industrial roundwood | 30 | 30 | 30 | |||||
Inflow to carbon stocks | Consumed wood | Consumed wood | Harvested wood | Harvested wood | Consumed wood | Consumed wood | Harvested wood | |
Initial year for carbon stocks | 1900 | 1900 | 1900 | 1900 (1961) | 1990 | 1990 | 1990 | |
Exports and imports for the AFA and AFA19 | All wood-based materials | Feedstock for HWPs | ||||||
Share of domestic feedstock for the PA, PA13, and PA19 | Sawnwood, wood-based panels, and other industrial roundwood | Production (using IRW, WCP, and WR) | Production minus exports (using IRW) | Production minus exports (using IRW) | ||||
Paper and paperboard | Production minus exports (using IRW and WP) | Production minus exports (using IRW, WP, and RP) | ||||||
Carbon conversion factors | Industrial roundwood, sawnwood, wood chips, wood residues, etc. (tC/m3) | 0.225 (temperate) 0.295 (tropical) | 0.225 (temperate) 0.295 (tropical) | 0.225 (temperate) 0.295 (tropical) | 0.229 (aggregate) | 0.229 (aggregate) | 0.229 (aggregate) | 0.229 (aggregate) |
Wood-based panels (tC/m3) | 0.294 | 0.294 | 0.294 | 0.269 | 0.269 | 0.269 | 0.269 | |
Paper and paperboard (tC/t) | 0.450 | 0.450 | 0.450 | 0.386 | 0.386 | 0.386 | 0.386 | |
Wood pulp (tC/t) | 0.450 | 0.386 | 0.417 | 0.417 | ||||
Wood charcoal (tC/t) | 0.765 | 0.765 |