Table 3.

Treatment of carbon inflows and outflows in forest and HWP pools in each HWP approach

Carbon transfers	Pool-based approaches				Flux-based approaches
	IO	SC	P	SCAD	Simple	AF
On-site absorption	FL C gain	FL C gain	FL C gain	FL C gain	FL C gain	FL C gain
On-site emissions	FL C loss	FL C loss	FL C loss	FL C loss	FL C loss	FL C loss
Off-site emissions	FL C loss	FL C loss	FL C loss	FL C loss	FL C loss	FL C loss
from FL to HWP as DU	FL C loss	FL C loss HWP C gain	FL C loss HWP C gain	FL C loss HWP C gain	–	–
from FL to exported HWP	FL C loss	FL C loss	FL C loss HWP C gain	FL C loss	–	–
from FL (in other countries) to imported HWP	–	HWP C gain	–	–	–	–
from HWP as DU to atmosphere	–	HWP C loss	HWP C loss	HWP C loss	HWP C loss	HWP C loss
from exported HWP to atmosphere	–	–	HWP C loss	–	HWP C loss	–
from imported HWP to atmosphere	–	HWP C loss	–	–	–	HWP C loss

IO instantaneous oxidation, SC stock-change approach, P production approach, SCAD stock change approach for HWP of domestic origin, Simple simple-decay approach, AF atmospheric-flow approach, FL forest land, C carbon, DU domestically utilized wood