Permafrost carbon cycle and its dynamics on the Tibetan Plateau

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外文摘要：Our knowledge on permafrost carbon(C)cycle is crucial for understanding its feedback to climate warming and developing nature-based solutions for mitigating climate change.To understand the characteristics of permafrost C cycle on the Tibetan Plateau,the largest alpine permafrost region around the world,we summarized recent advances including the stocks and fluxes of permafrost C and their responses to thawing,and depicted permafrost C dynamics within this century.We find that this alpine permafrost region stores approximately 14.1 Pg(1 Pg=1015 g)of soil organic C(SOC)in the top 3 m.Both substantial gaseous emissions and lateral C transport occur across this permafrost region.Moreover,the mobilization of frozen C is expedited by permafrost thaw,especially by the formation of thermokarst landscapes,which could release significant amounts of C into the atmosphere and surrounding water bodies.This alpine permafrost region nevertheless remains an important C sink,and its capacity to sequester C will continue to increase by 2100.For future perspectives,we would suggest developing long-term in situ observation networks of C stocks and fluxes with improved temporal and spatial coverage,and exploring the mechanisms underlying the response of ecosystem C cycle to permafrost thaw.In addition,it is essential to improve the projection of permafrost C dynamics through in-depth model-data fusion on the Tibetan Plateau.

外文关键词：

permafrost carbonclimate changecarbon releasecarbon sinkpermafrost thawthermokarst formation

作者：

Leiyi Chen、Guibiao Yang、Yuxuan Bai、Jinfeng Chang、Shuqi Qin、Futing Liu、Mei He、Yutong Song、Fan Zhang、Josep Peñuelas、Biao Zhu、Guoying Zhou、Yuanhe Yang

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作者单位：

State Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China

China National Botanical Garden,Beijing 100093,China

College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China

Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Beijing 100091,China

University of Chinese Academy of Sciences,Beijing 100049,China

Consejo Superior de Investigaciones Científicas(CSIC),Global Ecology Unit CREAF-CSIC-UAB(Universitat Autònoma de Barcelona),Barcelona 08193,Spain

Centre for Ecological Research and Forestry(CREAF),Barcelona 08193,Spain

Institute of Ecology,College of Urban and Environmental Sciences,and Key Laboratory for Earth Surface Processes of the Ministry of Education,Peking University,Beijing 100871,China

Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008,China

Key Laboratory of Tibetan Medicine Research,Chinese Academy of Sciences,Xining 810008,China

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaCAS Project for Young Scientists in Basic ResearchNational Key Research and Development Program of ChinaNew Cornerstone Science Foundation through the XPLORER PRIZESpanish GovernmentMCIN,AEI/10.13039/501100011033 European Union Next Generation EU/PRTR

项目编号：

322410343242500442141006YSBR-0372022YFF0801903PID2022-140808NB-I00TED2021-132627 B-I00

出版年：

2024

DOI：

10.1007/s11427-023-2601-1

中国科学:生命科学(英文版)

中国科学院

中国科学:生命科学(英文版)

CSTPCD

影响因子：0.806

ISSN：1674-7305

年,卷(期)：2024.67(9)