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DOI	10.1016/j.gloplacha.2012.08.009
	Impacts of climate and CO2 changes on the vegetation growth and carbon balance of Qinghai-Tibetan grasslands over the past five decades
	Piao, Shilong; Tan, Kun; Nan, Huijuan; Ciais, Philippe; Fang, Jingyun; Wang, Tao; Vuichard, Nicolas; Zhu, Biao
通讯作者	Piao, SL (通讯作者)
发表日期	2012
ISSN	0921-8181
EISSN	1872-6364
起始页码	73
结束页码	80
卷号	98-99
英文摘要	Climate change has significantly influenced global and regional terrestrial carbon balances. After being systematically calibrated against eddy-covariance measurements, meteorological observation, soil inventory data and satellite observed LAI (Leaf Area Index) in the Qinghai-Tibetan Plateau (Tan et al., 2010), the process-based ecosystem model called ORCHIDEE (ORganizing Carbon and Hydrology In Dynamic EcosystEms) was used in this study to investigate climate change and rising atmospheric CO2 concentration driven spatio-temporal changes in vegetation net primary production (NPP) and net ecosystem production (NEP) of Qinghai-Tibetan grasslands from 1961 to 2009. Overall, our simulation suggests that Qinghai-Tibetan grassland NPP significantly increased with a rate of 1.9 Tg C yr(-2) (1 Tg = 10(12) g) since 1961. At the regional scale, change in precipitation, temperature, and atmospheric CO2 concentration accounts for 52%, 34%, 39% of the increase in NPP, respectively, but their relative roles are not constant across the study area. Increase in NPP over the central and southwestern Qinghai-Tibetan Plateau is primarily attributed to precipitation changes, while rising atmospheric CO2 concentration is the main cause of NPP increase in eastern plateau. The model simulation also suggests that Qinghai-Tibetan grassland NEP increased from a net carbon source of -0.5 Tg C yr(-1) in the 1960s to a net carbon sink of 21.8 Tg C yr(-1) in the 2000s, mainly due to the rising atmospheric CO2 concentration and precipitation change. Although recent climate warming benefited vegetation growth, rising temperature did not significantly accelerate net carbon uptake from Qinghai-Tibetan grassland ecosystems due to enhanced soil carbon decomposition accompanying increase in temperature. (C) 2012 Elsevier B.V. All rights reserved.
关键词	NET PRIMARY PRODUCTION SOIL ORGANIC-CARBON TERRESTRIAL ECOSYSTEMS ALPINE MEADOW PLANT GEOGRAPHY DYNAMICS PLATEAU ATMOSPHERE CHINA REDUCTION
英文关键词	carbon cycle; carbon balance; climate warming; grassland; Qinghai-Tibetan Plateau
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000310862500008
来源期刊	GLOBAL AND PLANETARY CHANGE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258087
推荐引用方式 GB/T 7714	Piao, Shilong,Tan, Kun,Nan, Huijuan,et al. Impacts of climate and CO2 changes on the vegetation growth and carbon balance of Qinghai-Tibetan grasslands over the past five decades[J]. 中国科学院青藏高原研究所,2012,98-99.
APA	Piao, Shilong.,Tan, Kun.,Nan, Huijuan.,Ciais, Philippe.,Fang, Jingyun.,...&Zhu, Biao.(2012).Impacts of climate and CO2 changes on the vegetation growth and carbon balance of Qinghai-Tibetan grasslands over the past five decades.GLOBAL AND PLANETARY CHANGE,98-99.
MLA	Piao, Shilong,et al."Impacts of climate and CO2 changes on the vegetation growth and carbon balance of Qinghai-Tibetan grasslands over the past five decades".GLOBAL AND PLANETARY CHANGE 98-99(2012).