首页|Large potential of strengthening the land carbon sink in China through anthropogenic interventions

Large potential of strengthening the land carbon sink in China through anthropogenic interventions

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The terrestrial ecosystem in China mitigates 21%-45%of the national contemporary fossil fuel CO2 emis-sions every year.Maintaining and strengthening the land carbon sink is essential for reaching China's tar-get of carbon neutrality.However,this sink is subject to large uncertainties due to the joint impacts of climate change,air pollution,and human activities.Here,we explore the potential of strengthening land carbon sink in China through anthropogenic interventions,including forestation,ozone reduction,and lit-ter removal,taking advantage of a well-validated dynamic vegetation model and meteorological forcings from 16 climate models.Without anthropogenic interventions,considering Shared Socioeconomic Pathways(SSP)scenarios,the land sink is projected to be 0.26-0.56 Pg C a-1 at 2060,to which climate change contributes 0.06-0.13 Pg C a-1 and CO2 fertilization contributes 0.08-0.44 Pg C a-1 with the stron-ger effects for higher emission scenarios.With anthropogenic interventions,under a close-to-neutral emission scenario(SSP1-2.6),the land sink becomes 0.47-0.57 Pg C a-1 at 2060,including the contribu-tions of 0.12 Pg C a-1 by conservative forestation,0.07 Pg C a-1 by ozone pollution control,and 0.06-0.16 Pg C a-1 by 20%litter removal over planted forest.This sink can mitigate 90%-110%of the residue anthropogenic carbon emissions in 2060,providing a solid foundation for the carbon neutrality in China.

Carbon sinkForestationOzoneLitter removal

Xu Yue、Hao Zhou、Yang Cao、Hong Liao、Xiaofei Lu、Zhen Yu、Wenping Yuan、Zhu Liu、Yadong Lei、Stephen Sitch、Jürgen Knauer、Huijun Wang

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

College of Meteorology and Oceanography,National University of Defense Technology,Changsha 410073,China

Jiangsu Nanjing Environmental Monitoring Center,Nanjing 210013,China

Key Laboratory of Agrometeorology of Jiangsu Province,Institute of Ecology,School of Applied Meteorology,NUIST,Nanjing 210044,China

Institute of Carbon Neutrality,Sino-French Institute for Earth System Science,College of Urban and Environmental Sciences,Peking University,Beijing 100871,China

Department of Earth System Science,Tsinghua University,Beijing 100084,China

State Key Laboratory of Severe Weather and Key Laboratory of Atmospheric Chemistry of CMA,Chinese Academy of Meteorological Sciences,Beijing 100081,China

College of Life and Environmental Sciences,University of Exeter,Exeter EX4 4RJ,UK

Hawkesbury Institute for the Environment,Western Sydney University,Penrith 2751,Australia

Key Laboratory of Meteorological Disaster,Ministry of Education,Joint International Research Laboratory of Climate and Environment Change,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,NUIST,Nanjing 210044,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu Province

4229332342275128BK20220031

2024

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(16)