Estimates of grassland biomass and turnover time on the Tibetan Plateau

doi:10.1088/1748-9326/aa9997

CORC > 植物研究所 > 中国科学院植物研究所 > 植被与环境变化国家重点实验室

	Estimates of grassland biomass and turnover time on the Tibetan Plateau
	Xia, Jiangzhou 2; Ma, Minna 1; Liang, Tiangang 7; Wu, Chaoyang 6; Yang, Yuanhe 5; Zhang, Li 4; Zhang, Yangjian 6; Yuan, Wenping 2
刊名	ENVIRONMENTAL RESEARCH LETTERS
	2018
卷号	13 期号:1
关键词	biomass turnover time vegetation index Tibetan Plateau random forest
ISSN号	1748-9326
DOI	10.1088/1748-9326/aa9997
文献子类	Article
英文摘要	The grassland of the Tibetan Plateau forms a globally significant biome, which represents 6% of the world's grasslands and 44% of China's grasslands. However, large uncertainties remain concerning the vegetation carbon storage and turnover time in this biome. In this study, we quantified the pool size of both the aboveground and belowground biomass and turnover time of belowground biomass across the Tibetan Plateau by combining systematic measurements taken from a substantial number of surveys (i.e. 1689 sites for aboveground biomass, 174 sites for belowground biomass) with a machine learning technique (i.e. random forest, RF). Our study demonstrated that the RF model is effective tool for upscaling local biomass observations to the regional scale, and for producing continuous biomass estimates of the Tibetan Plateau. On average, the models estimated 46.57 Tg (1 Tg = 10(12)g) C of aboveground biomass and 363.71 Tg C of belowground biomass in the Tibetan grasslands covering an area of 1.32 X 10(6) km(2). The turnover time of belowground biomass demonstrated large spatial heterogeneity, with a median turnover time of 4.25 years. Our results also demonstrated large differences in the biomass simulations among the major ecosystem models used for the Tibetan Plateau, largely because of inadequate model parameterization and validation. This study provides a spatially continuous measure of vegetation carbon storage and turnover time, and provides useful information for advancing ecosystem models and improving their performance.
学科主题	Environmental Sciences ; Meteorology & Atmospheric Sciences
出版地	BRISTOL
WOS关键词	GROSS PRIMARY PRODUCTION ; CARBON STORAGE ; TERRESTRIAL ECOSYSTEMS ; ROOT ; VEGETATION ; CHINA ; FORESTS ; CLIMATE ; MODEL ; CO2
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000422903600003
资助机构	National Key Project [2016YFA0602701] ; General Program of National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31570468] ; One Hundred Person Project of Chinese Academy of Sciences [Y329k71002] ; Youth Changjiang Scholars Programme of China [Q2016161] ; National Youth Top-notch Talent Support Program
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/20383]
专题	植被与环境变化国家重点实验室
作者单位	1.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China 3.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 6.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Gansu, Peoples R China 7.Sun Yat Sen Univ, Sch Atmospher Sci, Zhuhai 519082, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Xia, Jiangzhou,Ma, Minna,Liang, Tiangang,et al. Estimates of grassland biomass and turnover time on the Tibetan Plateau[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(1).
APA	Xia, Jiangzhou.,Ma, Minna.,Liang, Tiangang.,Wu, Chaoyang.,Yang, Yuanhe.,...&Yuan, Wenping.(2018).Estimates of grassland biomass and turnover time on the Tibetan Plateau.ENVIRONMENTAL RESEARCH LETTERS,13(1).
MLA	Xia, Jiangzhou,et al."Estimates of grassland biomass and turnover time on the Tibetan Plateau".ENVIRONMENTAL RESEARCH LETTERS 13.1(2018).