China's carbon sinks from land-use change underestimated

被引:0
作者
Zhu, Yakun [1 ,2 ]
Xia, Xiaosheng [1 ]
Canadell, Josep G. [3 ]
Piao, Shilong [4 ]
Lu, Xinqing [1 ]
Mishra, Umakant [5 ]
Wang, Xuhui [4 ]
Yuan, Wenping [4 ]
Qin, Zhangcai [1 ]
机构
[1] Sun Yat Sen Univ, Sch Atmospher Sci, Key Lab Trop Atmosphere Ocean Syst, Guangdong Prov Key Lab Climate Change,Minist Educ, Zhuhai, Peoples R China
[2] Eastern Inst Technol, Ningbo, Peoples R China
[3] CSIRO Environm, Global Carbon Project, Canberra, ACT, Australia
[4] Peking Univ, Inst Carbon Neutral, Coll Urban & Environm Sci, Beijing, Peoples R China
[5] Sandia Natl Labs, Computat Biol & Biophys, Livermore, CA USA
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
TERRESTRIAL ECOSYSTEMS; SEQUESTRATION; EMISSIONS; BALANCE;
D O I
10.1038/s41558-025-02296-z
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The size and attribution of the regional net carbon flux from land-use change (LUC) activities (ELUC) are often highly debated, especially in regions such as China, which has experienced decades-long extensive reforestation activities. Here, using a LUC dataset incorporating remote-sensing and national forest inventory data with two modelling approaches, we show that ELUC in China shifted from a carbon source to a sink in the 1990s, contributing to a net cumulative CO2 removal of 2.0 Pg C during 1981-2020. From 2001 to 2020, the average ELUC was -0.14 Pg C yr-1, accounting for over one-third of the national land carbon sinks. Forest-related LUC activities contributed greatly to national carbon fluxes, while non-forest-related activities played a dominant role in certain areas. Our findings suggest that the carbon sinks from LUC activities in China may be largely underestimated in global assessments, underscoring the need to develop region-specific modelling for evaluation and potential regulation.
引用
收藏
页码:428 / 435
页数:10
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