Shift in controlling factors of carbon stocks across biomes on the Qinghai-Tibetan Plateau

doi:10.1088/1748-9326/ac78f5

	Shift in controlling factors of carbon stocks across biomes on the Qinghai-Tibetan Plateau
	Han, Daorui ; Hu, Zhongmin 1; Wang, Xuhui 2; Wang, Tao 3; Chen, Anping 4; Weng, Qihao 5; Liang, Minqi ; Zeng, Xiang ; Cao, Ruochen ; Di, Kai ; Luo, Dengnan ; Zhang, Guangru ; Yang, Yuanhe6 ; He, Honglin 7,8; Fan, Jiangwen 7,8; Yu, Guirui 7,8
	2022
发表期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
卷号	17 期号:7
摘要	The Qinghai-Tibetan Plateau (TP) accumulated a large amount of organic carbon, while its size and response to environmental factors for the whole area remain uncertain. Here, we synthesized a dataset to date with the largest data volume and broadest geographic coverage over the TP, composing of 7196 observations from multiple field campaigns since the 1980s, and provided a comprehensive assessment of the size and spatial distribution of carbon pools for both plant and soils on the TP using machine learning algorithms. The estimated soil organic carbon (SOC) storage to 1 m depth was 32.0(16.69)(47.9) Pg (11.72(7.2)(17.53) kg m(-2) on average), accounting for approximately 37.2(22.9)(55.6)% of China's SOC stock on its <30% land area. There was 15.52(9.91)(23.52) Pg C stored in grassland soils (1 m), which played as the largest C pool on the TP, followed by shrubland (7.52(4.8)(11.6) Pg) and forest (3.72(2.5)(5.36) Pg). The estimated plant C pool was 2.4(0.95)(5.16) Pg (1.03(0.2)(2.7) Pg in aboveground biomass (AGB) and 1.37(0.75)(2.45) Pg in belowground biomass). Soil and biomass C density presented a similar spatial pattern, which generally decreased from the east and southeast parts to the central and western parts. We found both vegetation and soil C (1 m depth) were primarily regulated by climatic variables and C input across the entire TP. However, main driving factors of the C stocks varied among vegetation types and depth intervals. Though AGB played as an important role in SOC variation for both topsoil (0-30 cm) and subsoil (30-100 cm), the strength of the correlation weakened with depth and was gradually attenuated from grassland to shrubland, and forest. The outcomes of this study provided an updated geospatial estimate of SOC stocks for the entire TP and their relationships with environmental factors, which are essential to carbon model benchmarking and better understanding the feedbacks of C stocks to global change.
关键词	Qinghai-Tibetan Plateau SOC mapping machine learning algorithms driving factors uncertainties
学科领域	Environmental Sciences ; Meteorology & Atmospheric Sciences
DOI	10.1088/1748-9326/ac78f5
收录类别	SCI
语种	英语
WOS关键词	SOIL ORGANIC-CARBON ; PERMAFROST REGIONS ; GRASSLANDS ; CLIMATE ; STORAGE ; POOLS ; 1980S
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000816866900001
出版者	IOP Publishing Ltd
文献子类	Article
出版地	BRISTOL
资助机构	Second Tibetan Plateau Scientific Expedition and Research Program [2019QZKK0405] ; China Postdoctoral Science Foundation [2020M672684] ; Key RAMP ; D Program of Hainan [ZDYF2022SHFZ042] ; start-up fund of Hainan University [KYQD(ZR)21096]
作者邮箱	huzm@igsnrr.ac.cn
作品OA属性	gold
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/2S10CLM1/28866
专题	植被与环境变化国家重点实验室
作者单位	1.South China Normal Univ, Sch Geog, Guangzhou 510631, Peoples R China 2.Hainan Univ, Key Lab Agroforestry Environm Proc & Ecol Regulat, Haikou 570228, Hainan, Peoples R China 3.Peking Univ, Coll Urban & Environm Sci, SinoFrench Inst Earth Syst Sci, Beijing 100091, Peoples R China 4.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing 100101, Peoples R China 5.Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA 6.Indiana State Univ, Ctr Urban & Environm Change, Dept Earth & Environm Syst, Terre Haute, IN 47809 USA 7.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 8.Chinese Acad Sci, Synth Res Ctr Chinas Ecosyst Res Network, Beijing 100101, Peoples R China 9.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Han, Daorui,Hu, Zhongmin,Wang, Xuhui,et al. Shift in controlling factors of carbon stocks across biomes on the Qinghai-Tibetan Plateau[J]. ENVIRONMENTAL RESEARCH LETTERS,2022,17(7).
APA	Han, Daorui.,Hu, Zhongmin.,Wang, Xuhui.,Wang, Tao.,Chen, Anping.,...&Yu, Guirui.(2022).Shift in controlling factors of carbon stocks across biomes on the Qinghai-Tibetan Plateau.ENVIRONMENTAL RESEARCH LETTERS,17(7).
MLA	Han, Daorui,et al."Shift in controlling factors of carbon stocks across biomes on the Qinghai-Tibetan Plateau".ENVIRONMENTAL RESEARCH LETTERS 17.7(2022).

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