气候变化领域集成服务门户(CCPortal): Carbon and water fluxes and their coupling in an alpine meadow ecosystem on the northeastern Tibetan Plateau

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DOI	10.1007/s00704-020-03303-3
	Carbon and water fluxes and their coupling in an alpine meadow ecosystem on the northeastern Tibetan Plateau
	Wang, Yuyang; Ma, Yaoming; Li, Haixia; Yuan, Ling
通讯作者	Ma, YM (通讯作者)
发表日期	2020
ISSN	0177-798X
EISSN	1434-4483
起始页码	1
结束页码	18
卷号	142 期号:1-2
英文摘要	Alpine meadow is one of the most widely distributed vegetation types on the Tibetan Plateau-the Earth's Third Pole. Characterizing the carbon and water vapor fluxes in alpine meadow ecosystems is of particular importance for elucidating the mechanisms underlying the carbon budget and water cycle in high-altitude areas, especially under changing climatic conditions. Thus, the quantitative relationships between carbon and water fluxes and environmental drivers were examined based on a continuous eddy covariance (EC) dataset from 2013 to 2015 over the alpineKobresiameadow on the northeastern Tibetan Plateau. The results show that (1) the net ecosystem CO(2)exchange (NEE) was - 152.89 g C m(-2) year(-1), - 197.69 g C m(-2) year(-1), and - 160.09 g C m(-2) year(-1)from 2013 to 2015, respectively, suggesting that this alpine meadow ecosystem is a strong and consistent carbon sink. (2) Both the multiple stepwise regression analysis (MSRA) and the structural equation model (SEM) analysis confirmed the dominant role ofT(s)in controlling the carbon flux and that ofR(n)in controlling the water vapor flux. (3) The inherent water use efficiency (IWUE = GPPxVPD/ET) and underlying water use efficiency (uWUE = GPPxVPD(0.5)/ET), which incorporates the vapor pressure deficit (VPD) effect, better described the carbon-water coupling characteristics at daily and hourly scales than did the traditional water use efficiency (WUE=GPP/ET). These findings highlight the dominant climatic factors controlling CO(2)and water vapor exchanges and contribute to our knowledge of the land surface-atmosphere exchange in alpine meadows on the Tibetan Plateau.
关键词	USE EFFICIENCY CO2 EXCHANGE DIOXIDE EXCHANGE INNER-MONGOLIA BIOPHYSICAL CONTROLS SOIL-MOISTURE INTERANNUAL VARIATIONS GRASSLAND ECOSYSTEMS SEMIARID SHRUBLAND STEPPE ECOSYSTEM
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000542112500003
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
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/259722
推荐引用方式 GB/T 7714	Wang, Yuyang,Ma, Yaoming,Li, Haixia,et al. Carbon and water fluxes and their coupling in an alpine meadow ecosystem on the northeastern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2020,142(1-2).
APA	Wang, Yuyang,Ma, Yaoming,Li, Haixia,&Yuan, Ling.(2020).Carbon and water fluxes and their coupling in an alpine meadow ecosystem on the northeastern Tibetan Plateau.THEORETICAL AND APPLIED CLIMATOLOGY,142(1-2).
MLA	Wang, Yuyang,et al."Carbon and water fluxes and their coupling in an alpine meadow ecosystem on the northeastern Tibetan Plateau".THEORETICAL AND APPLIED CLIMATOLOGY 142.1-2(2020).