Maximum potential of vegetation carbon sink in Chinese forests

Forest vegetation is essential in sequestering carbon dioxide (CO2) from the atmosphere and mediating global warming. The carbon (C) sink potential of forest vegetation in different provinces is vital for policymakers to develop C-neutral technical routes and regional priorities in China; however, t...

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Veröffentlicht in:The Science of the total environment 2023-12, Vol.905, p.167325-167325, Article 167325
Hauptverfasser: Peng, Bo, Zhou, Zhiyong, Cai, Weixiang, Li, Mingxu, Xu, Li, He, Nianpeng
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Sprache:eng
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Zusammenfassung:Forest vegetation is essential in sequestering carbon dioxide (CO2) from the atmosphere and mediating global warming. The carbon (C) sink potential of forest vegetation in different provinces is vital for policymakers to develop C-neutral technical routes and regional priorities in China; however, the mechanism remains unclear. In this study, we compiled the public data on forest vegetation biomass or storage along forest succession series between 2003 and 2022 and obtained the spatial variation of the maximum C storage(BCmax) of forest vegetation using classic logistic equation and nonlinear fitting. Furthermore, the C sink potential (∆Cpot) of the Chinese forest vegetation was calculated based on the differences between the BCmax and intensive field-investigated data in the 2010s. The results showed that the BCmax in the Chinese forest vegetation was approximately 19.03 Pg. The BCmax in southwest and northeast China were higher than those in other regions. The ∆Cpot was estimated as 8.83 Pg. Moreover, 1 km × 1 km spatial raster data for ∆Cpot were produced using the spatial raster calculation. Similarly, the per capita ∆Cpot of regions with low economic development (southwest, central, and southern Chinese provinces) were five to ten times higher than those of regions with a higher economic level. The ∆Cpot correlated negatively with gross domestic product (GDP)across all Chinese provinces. Our findings provide new insights into the ∆Cpot of the Chinese forest vegetation under natural restoration and emphasize that some differences in financial and political support among different provinces facilitate achieving a large ∆Cpot for C neutrality. Relationship between the maximum carbon storage of forest vegetation (BCmax) and the carbon sink potential (∆Cpot) in China based on the secondary succession theory. According to the theory of secondary succession, forest biomass may increase with forest age as a logistics curve. Therefore, we can estimate the Chinese BCmax and the spatial distribution of ∆Cpot based on the intensive investigation data of 2010 by the Chinese Academy of Sciences using the spatial raster calculation considering annual mean temperature and annual mean precipitation, among others. The spatial information on BCmax and ∆Cpot is essential for policymakers to ensure the Chinese carbon-neutral strategy. [Display omitted] •Regional carbon (C) sink potential (∆Cpot) is unclear in Chinese forests vegetation.•Spatial data (1 km × 1 km) for maxi
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2023.167325