Re-estimating the changes and ranges of forest biomass carbon in China during the past 40 years

Zhou, Xiaolu; Lei, Xiangdong; Liu, Caixia; Huang, Huabing; Zhou, Carl; Peng, Changhui

doi:10.1186/s40663-019-0208-9

Table 1 Different methods for estimating carbon storages of China’s forest (PgC). The first period is the start of the Returning Farmland to Forest Program

From: Re-estimating the changes and ranges of forest biomass carbon in China during the past 40 years

Method	Feature	Period			Reference
Method	Feature	1999–2003	2004–2008	2009–2013	Reference
Volume-derived	Stand-level linear volume-biomass equations, or continuous biomass expansion factor (CBEF), using variables of total area, volume per unit area. Data: NFIs.	5.9	6.2		Fang et al. (2007; 2014); Guo et al. (2010)
Volume-derived	Age-grouped, stand-level linear volume-biomass equations based. Data: 6th NFI.	5.5			Xu et al. (2007)
Volume-derived	Mean ratio method, using variables of total volume and mean BEF. Data: 6th NFI.	6.2			Guo et al. (2010)
Volume-derived	Tree-level allometric biomass equations with DBH and height predictors. Provincial BEFs were calculated based on DBH and height information of plots (660,000 permanent plots established in 7th NFI). Data: 7th NFI.		6.7		Li et al. (2011)
Volume-derived	Stand-level allometric volume-biomass equations (power functions); removing upscaling error. Data: NFIs.	4.9	5.4	6.0	Zhou et al. (2016)
Carbon density	Mean biomass density method, using variables of total area and mean biomass density. Data: 6th NFI.	7.7			Guo et al. (2010)
Carbon density	Deriving carbon density from site measurements, and average carbon density from the provincial area-weighted average and its corresponding area; using Random Forest model to detail spatial patterns of carbon density. Data: Independent investigation, establishing total 7800 sites for field measurements in forests.			10.4	Tang et al. (2018)
Remote sensing	Multiple spectral bands of MODIS and forest inventory data with an empirical statistical model.	6.3		6.8	Sun et al. (2015)
Remote sensing	A development of AGBmapping. Data: Geoscience Laser Altimeter System (GLAS)/Ice, Cloud, Land Elevation Satellite (ICESat) data, optical imagery, climate surfaces, and topographic data.		10.2^a		Su et al. (2016)

^aTotal biomass carbon, estimated from the reported AGB (7.5 Pg)

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