Permafrost carbon cycle and its dynamics on the Tibetan Plateau  

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

机构地区：[1]State Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China [2]China National Botanical Garden,Beijing 100093,China [3]College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China [4]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 [5]University of Chinese Academy of Sciences,Beijing 100049,China [6]Consejo Superior de Investigaciones Científicas(CSIC),Global Ecology Unit CREAF-CSIC-UAB(Universitat Autònoma de Barcelona),Barcelona 08193,Spain [7]Centre for Ecological Research and Forestry(CREAF),Barcelona 08193,Spain [8]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 [9]Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008,China [10]Key Laboratory of Tibetan Medicine Research,Chinese Academy of Sciences,Xining 810008,China

出　　处：《Science China(Life Sciences)》2024年第9期1833-1848,共16页中国科学（生命科学英文版）

基　　金：supported by the National Natural Science Foundation of China(32241034,32425004,42141006);the CAS Project for Young Scientists in Basic Research(YSBR-037);the National Key Research and Development Program of China(2022YFF0801903);the New Cornerstone Science Foundation through the XPLORER PRIZE;supported by the Spanish Government grants PID2022-140808NB-I00 and TED2021-132627 B-I00 funded by MCIN,AEI/10.13039/501100011033 European Union Next Generation EU/PRTR。

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=1015g)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.

关 键 词：permafrost carbon climate change carbon release carbon sink permafrost thaw thermokarst formation 

分 类 号：Q14[生物学—生态学] P642.14[生物学—普通生物学]