CO2 Fertilization Confounds Tree-Ring Records of Regional Hydroclimate at Northeastern Qinghai-Tibetan Plateau

doi:10.1029/2018EA000529

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所

	CO2 Fertilization Confounds Tree-Ring Records of Regional Hydroclimate at Northeastern Qinghai-Tibetan Plateau
	Wang, Wenzhi1,2,3 ; Liu, Xiaohong 2,4; Xu, Guobao 2; Treydte, Kerstin 5; Shao, Xuemei 6; Qin, Dahe 2; Wang, Genxu1 ; McDowell, Nate G.3
刊名	EARTH AND SPACE SCIENCE
	2019-05-01
卷号	6 期号:5 页码:730-740
ISSN号	2333-5084
DOI	10.1029/2018EA000529
通讯作者	Liu, Xiaohong(xhliu@snnu.edu.cn)
英文摘要	Understanding historical hydroclimate change during the last millennium is of fundamental importance for forecasting and evaluating the regional hydrologic cycle and water security under global warming. Here we compared observations of tree-ring stable isotope ratios (delta C-13 and delta O-18), tree-ring widths, lake sediments estimates of regional hydroclimate, and glacier advance and retreat for northeastern Qinghai-Tibetan Plateau, China. The hydroclimate dynamics in our composite isotope record is similar to that derived from the juniper tree-ring widths throughout the last millennium until the latter half of the twentieth century, after which they diverged with the tree-ring widths indicating an unprecedented wet period while the isotopic results, sediment proxies, and glaciers demonstrated a drying pattern. Rising atmospheric CO2 promoted increases in canopy-scale intrinsic water-use efficiency and growth, causing tree-ring widths to overestimate the regional hydroclimate signal in the growth record. Thus, our study suggests that CO2 fertilization over the last century may confound hydroclimate reconstructions inferred from juniper tree-ring width at northeastern Qinghai-Tibetan Plateau, which may cause overestimates of water resources. Correction for CO2-induced changes in tree-ring widths may be necessary to accurately utilize tree rings for paleoclimate reconstructions.
资助项目	National Natural Science Foundation of China[41571196] ; National Natural Science Foundation of China[41601206] ; National Natural Science Foundation of China[41721091] ; State Key Laboratory of Cryospheric Sciences[SKLCS-OP-2016-07] ; China Postdoctoral Science Foundation[2015LH0005] ; China Postdoctoral Science Foundation[2016M592713] ; CAS Light of West China Program ; Youth Foundation of the Institute of Mountain Hazards and Environment, CAS ; Fundamental Research Funds for the Central Universities[GK201801007] ; China Scholarship Council ; LDRD program from Pacific Northwest National Laboratory
WOS关键词	WATER-USE EFFICIENCY ; CARBON-ISOTOPE DISCRIMINATION ; STABLE-ISOTOPES ; GROWTH ; FOREST ; PINE ; TEMPERATURE ; CHRONOLOGIES ; DIOXIDE ; PRECIPITATION
WOS研究方向	Astronomy & Astrophysics ; Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000472560700005
资助机构	National Natural Science Foundation of China ; State Key Laboratory of Cryospheric Sciences ; China Postdoctoral Science Foundation ; CAS Light of West China Program ; Youth Foundation of the Institute of Mountain Hazards and Environment, CAS ; Fundamental Research Funds for the Central Universities ; China Scholarship Council ; LDRD program from Pacific Northwest National Laboratory
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/26509]
专题	中国科学院水利部成都山地灾害与环境研究所
通讯作者	Liu, Xiaohong
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolut & Regulat, Chengdu, Sichuan, Peoples R China 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou, Gansu, Peoples R China 3.Pacific Northwest Natl Lab, Richland, WA 99352 USA 4.Shaanxi Normal Univ, Sch Geog & Tourism, Xian, Shaanxi, Peoples R China 5.Swiss Fed Res Inst WSL, Dendro Sci Grp, Birmensdorf, Switzerland 6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Wenzhi,Liu, Xiaohong,Xu, Guobao,et al. CO2 Fertilization Confounds Tree-Ring Records of Regional Hydroclimate at Northeastern Qinghai-Tibetan Plateau[J]. EARTH AND SPACE SCIENCE,2019,6(5):730-740.
APA	Wang, Wenzhi.,Liu, Xiaohong.,Xu, Guobao.,Treydte, Kerstin.,Shao, Xuemei.,...&McDowell, Nate G..(2019).CO2 Fertilization Confounds Tree-Ring Records of Regional Hydroclimate at Northeastern Qinghai-Tibetan Plateau.EARTH AND SPACE SCIENCE,6(5),730-740.
MLA	Wang, Wenzhi,et al."CO2 Fertilization Confounds Tree-Ring Records of Regional Hydroclimate at Northeastern Qinghai-Tibetan Plateau".EARTH AND SPACE SCIENCE 6.5(2019):730-740.