Table 3. Site information and annual net ecosystem production (NEP, gC m⁻² yr⁻¹) for conifer and/or mixed forests(no. 1-8, eddy covariance-based NEP estimation; no. 9-10, biometric-based NEP estimation).

No.	Country	Location	Elevation (m)	Slope (°)	MAT (°C)	MAP (mm)	Species	Age (yr)	Stand density (trees/ha)	Height (m)	DBH (cm)	NEP (gC/m2/yr)	Ref.
1	Korea	37°56’20"N,126°57’17"E	293		11.5	1,210	Quercus variabilisQuercus mongolicaPinus koraiensis	20-40				362	Lee et al.(2017)
2	Japan	34°58’N,135°59’E	190-255	9.2	14.0	1,645	Chamaecyparis obtusa	44	1,853	13.9		477-480	Takanashi et al.(2005)
3	Japan	35°27’17"N,138°45’44"E	1,030	3.5	9.5	1,955	Pinus densiflora	90		20.0	30.0	388	Mizoguchi et al.(2012)
4	China	42°24’N,128°28’E	738		0.9-4.0	600-810	Pinus koraiensisTilia amurensisQuercus mongolicaFraxinus mandshuricaAcer mono	200		26.0		308	Zhang et al.(2006)
5	Poland	53°11’N,16°05’E	180	0.0-2.0	8.1	553	Pinus sylvestris	60-65	900	26.30	25.0	494-765	Ziemblinska et al.(2016)
6	Finland	61°51’N,24°17’E	160-180		3.0	700	Pinus sylvestris	12	5,800	1.7	1.2	24	Kolari et al.(2004)
								40	2,300	12.2	12.3	179-192
								75	770	20.0	26.0	323
7	USA	44°27’04"N,121°33’29"W	1,255		6.7-8.0	480	Pinus ponderosa	56	325	14.0	348-463	Vickers et al.(2012);Kim et al.(2016)
		44°18’54"N,121°36’28"W	1,005			360	Pinus ponderosa	16	260	3.3		49-199
8	Canada	42°39’39"N,80°33’34"W	265		8.0	1,036	Pinus strobus	15	1,567	6.8	15.7	104	Chan et al.(2018)
9	Korea	36°51’17"N,128°64’41"E	380	17.0	10.1	2,066	Pinus densiflora	35	1,300	11.0	17.1	107	Lee et al.(2013)
10	Korea	37°47’01"N,127°10’37"E	410-440	13-15	11.3	1,518	Pinus densiflora	65-75	450		32.4	418	Noh et al.(2013)
				15-22					842		25.1	550