Climate Sensitivities of Carbon Turnover Times in Soil and Vegetation: Understanding Their Effects on Forest Carbon Sequestration

doi:10.1029/2020JG005880

	Climate Sensitivities of Carbon Turnover Times in Soil and Vegetation: Understanding Their Effects on Forest Carbon Sequestration
	Ge, Rong 1,2; He, Honglin 3,4; Zhang, Li 3; Ren, Xiaoli 3; Williams, Mathew ; Yu, Guirui ; Smallman, T. Luke ; Zhou, Tao 7; Li, Pan 8; Xie, Zongqiang9 ; Wang, Silong 10; Wang, Huimin ; Zhou, Guoyi 11; Zhang, Qibin 9; Wang, Anzhi 10; Fan, Zexin 12; Zhang, Yiping 12; Shen, Weijun 11; Yin, Huajun 13; Lin, Luxiang 12
	2022
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
卷号	127 期号:3
摘要	The high uncertainty associated with the response of terrestrial carbon (C) cycle to climate is dominated by ecosystem C turnover time (tau(eco)). Although the relationship between tau(eco) and climate has been extensively studied, significant knowledge gaps remain regarding the differential climate sensitivities of turnover time in major biomass (tau(veg)) and soil (tau(soil)) pools, and their effects on vegetation and soil C sequestration under climate change are poorly understood. Here, we collected multiple time series observations on soil and vegetation C from permanent plots in 10 Chinese forests and used model-data fusion to retrieve key C cycle process parameters that regulate tau(soil) and tau(veg). Our analysis showed that tau(veg) and tau(soil) both decreased with increasing temperature and precipitation, and tau(soil) was more than twice as sensitive (1.27 years/degrees C, 1.70 years/100 mm) than tau(veg) (0.53 years/degrees C, 0.40 years/100 mm). The higher climate sensitivity of tau(soil) caused a more rapid decrease in tau(soil) than in tau(veg) with increasing temperature and precipitation, thereby significantly reducing the difference between tau(soil) and tau(veg) (tau(diff)) under warm and humid conditions. tau(diff), an indicator of the balance between the soil C input and exit rate, was strongly responsible for the variation (more than 50%) in soil C sequestration. Therefore, a smaller tau(diff) under warm and humid conditions suggests a relatively lower contribution from soil C sequestration. This information has strong implications for understanding forest C-climate feedback, predicting forest C sink distributions in soil and vegetation under climate change, and implementing C mitigation policies in forest plantations or soil conservation.
关键词	soil carbon turnover time vegetation carbon turnover time climate sensitivity forest carbon sequestration
学科领域	Environmental Sciences ; Geosciences, Multidisciplinary
DOI	10.1029/2020JG005880
收录类别	SCI
语种	英语
WOS关键词	GROSS PRIMARY PRODUCTIVITY ; DATA ASSIMILATION SYSTEM ; INDUCED TREE MORTALITY ; ORGANIC-MATTER ; TEMPERATURE SENSITIVITY ; RESIDENCE TIME ; RADIOCARBON CONSTRAINTS ; TERRESTRIAL ECOSYSTEMS ; NUTRIENT AVAILABILITY ; EDDY COVARIANCE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000777487700014
出版者	AMER GEOPHYSICAL UNION
文献子类	Article
出版地	WASHINGTON
EISSN	2169-8961
资助机构	National Natural Science Foundation of China [42030509] ; National Key Research and Development Program of China [2021YFF0703903] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA19020301] ; Newton Fund CSSP, from the Royal Society ; UKSA Forests 2020
作者邮箱	hehl@igsnrr.ac.cn ; li.zhang@igsnrr.ac.cn
作品OA属性	Green Accepted
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28932
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 2.Nanjing Audit Univ, Sch Govt Audit, Inst Nat Resources & Environm Audits, Nanjing, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Natl Ecosyst Sci Data Ctr, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 6.Univ Edinburgh, Sch GeoSci, Edinburgh, Midlothian, Scotland 7.Univ Edinburgh, Natl Ctr Earth Observat, Edinburgh, Midlothian, Scotland 8.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing, Peoples R China 9.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin, Peoples R China 10.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 11.Chinese Acad Sci, Inst Appl Ecol, Shenyang, Peoples R China 12.Chinese Acad Sci, South China Bot Garden, Guangzhou, Peoples R China 13.Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla, Peoples R China 14.Chinese Acad Sci, Chengdu Inst Biol, Chengdu, Peoples R China
推荐引用方式 GB/T 7714	Ge, Rong,He, Honglin,Zhang, Li,et al. Climate Sensitivities of Carbon Turnover Times in Soil and Vegetation: Understanding Their Effects on Forest Carbon Sequestration[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2022,127(3).
APA	Ge, Rong.,He, Honglin.,Zhang, Li.,Ren, Xiaoli.,Williams, Mathew.,...&Lin, Luxiang.(2022).Climate Sensitivities of Carbon Turnover Times in Soil and Vegetation: Understanding Their Effects on Forest Carbon Sequestration.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,127(3).
MLA	Ge, Rong,et al."Climate Sensitivities of Carbon Turnover Times in Soil and Vegetation: Understanding Their Effects on Forest Carbon Sequestration".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 127.3(2022).

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