首页|The carbon budget of China:1980-2021

The carbon budget of China:1980-2021

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As one of the world's largest emitters of greenhouse gases,China has set itself the ambitious goal of achieving carbon peaking and carbon neutrality.Therefore,it is crucial to quantify the magnitude and trend of sources and sinks of atmospheric carbon dioxide(CO2),and to monitor China's progress toward these goals.Using state-of-the-art datasets and models,this study comprehensively estimated the anthropogenic CO2 emissions from energy,industrial processes and product use,and waste along with natural sources and sinks of CO2 for all of China during 1980-2021.To recognize the differences among various methods of estimating greenhouse emissions,the estimates are compared with China's National Greenhouse Gas Inventories(NGHGIs)for 1994,2005,2010,2012,and 2014.Anthropogenic CO2 emis-sions in China have increased by 7.39 times from 1980 to 12.77 Gt CO2 a-1 in 2021.While benefiting from ecological projects(e.g.,Three Norths Shelter Forest System Project),the land carbon sink in China has reached 1.65 Gt CO2 a-1 averaged through 2010-2021,which is almost 15.81 times that of the carbon sink in the 1980s.On average,China's terrestrial ecosystems offset 14.69％±2.49％of anthropogenic CO2 emissions through 2010-2021.Two provincial-level administrative regions of China,Xizang and Qinghai,have achieved carbon neutrality according to our estimates,but nearly half of the administrative regions of China have terrestrial carbon sink offsets of less than 10％of anthropogenic CO2 emissions.This study indicated a high level of consistency between NGHGIs and various datasets used for estimating fos-sil CO2 emissions,but found notable differences for land carbon sinks.Future estimates of the terrestrial carbon sinks of NGHGIs urgently need to be verified with process-based models which integrate the com-prehensive carbon cycle processes.

CO2 emissionLand carbon sinkChinaCarbon neutralityCarbon budget

Xiaosheng Xia、Peiyang Ren、Xuhui Wang、Dan Liu、Xiuzhi Chen、Li Dan、Bin He、Honglin He、Weimin Ju、Minqi Liang、Xingjie Lu、Jing Peng、Zhangcai Qin、Jiangzhou Xia、Bo Zheng、Jing Wei、Xu Yue、Guirui Yu、Shilong Piao、Wenping Yuan

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School of Atmospheric Sciences,Guangdong Province Data Center of Terrestrial and Marine Ecosystems Carbon Cycle,Sun Yat-sen University,Zhuhai 510245,China

Sino-French Institute for Earth System Science,College of Urban and Environmental Sciences,Peking University,Beijing 100091,China

State Key Laboratory of Tibetan Plateau Earth System,Resources and Environment,Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China

Key Laboratory of Regional Climate-Environment for Temperate East Asia,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China

State Key Laboratory of Earth Surface Processes and Resource Ecology,College of Global Change and Earth System Science,Beijing Normal University,Beijing 100875,China

Synthesis Research Center of China's Ecosystem Research Network,Key Laboratory of Ecosystem Network Observation and Modeling,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China

International Institute for Earth System Science,Nanjing University,Nanjing 210023,China

Tianjin Key Laboratory of Water Resources and Environment,Tianjin Normal University,Tianjin 300387,China

Institute of Environment and Ecology,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control,Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,School of Environmental Science and Engineering,Nanjing University of Information Science & Technology,Nanjing 210044,China

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National Science Fund for Distinguished Young ScholarsKey Project of the National Natural Science Foundation of China

4192500142141020

2024

10.1016/j.scib.2023.11.016

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(1)
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