globalchange  > 气候变化事实与影响
DOI: 10.1002/2017GB005733
Scopus记录号: 2-s2.0-85037972206
论文题名:
Response of Water Use Efficiency to Global Environmental Change Based on Output From Terrestrial Biosphere Models
作者: Zhou S; , Yu B; , Schwalm C; R; , Ciais P; , Zhang Y; , Fisher J; B; , Michalak A; M; , Wang W; , Poulter B; , Huntzinger D; N; , Niu S; , Mao J; , Jain A; , Ricciuto D; M; , Shi X; , Ito A; , Wei Y; , Huang Y; , Wang G
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2017
卷: 31, 期:11
起始页码: 1639
结束页码: 1655
语种: 英语
英文关键词: atmospheric CO2 ; attribution ; interannual variability ; physiology ; structure ; trend
Scopus关键词: annual variation ; carbon cycle ; concentration (composition) ; environmental change ; environmental factor ; evapotranspiration ; global change ; leaf area index ; physiological response ; primary production ; stomatal conductance ; trend analysis ; vapor pressure ; water use efficiency
英文摘要: Water use efficiency (WUE), defined as the ratio of gross primary productivity and evapotranspiration at the ecosystem scale, is a critical variable linking the carbon and water cycles. Incorporating a dependency on vapor pressure deficit, apparent underlying WUE (uWUE) provides a better indicator of how terrestrial ecosystems respond to environmental changes than other WUE formulations. Here we used 20th century simulations from four terrestrial biosphere models to develop a novel variance decomposition method. With this method, we attributed variations in apparent uWUE to both the trend and interannual variation of environmental drivers. The secular increase in atmospheric CO2 explained a clear majority of total variation (66 ± 32%: mean ± one standard deviation), followed by positive trends in nitrogen deposition and climate, as well as a negative trend in land use change. In contrast, interannual variation was mostly driven by interannual climate variability. To analyze the mechanism of the CO2 effect, we partitioned the apparent uWUE into the transpiration ratio (transpiration over evapotranspiration) and potential uWUE. The relative increase in potential uWUE parallels that of CO2, but this direct CO2 effect was offset by 20 ± 4% by changes in ecosystem structure, that is, leaf area index for different vegetation types. However, the decrease in transpiration due to stomatal closure with rising CO2 was reduced by 84% by an increase in leaf area index, resulting in small changes in the transpiration ratio. CO2 concentration thus plays a dominant role in driving apparent uWUE variations over time, but its role differs for the two constituent components: potential uWUE and transpiration. ©2017. American Geophysical Union. All Rights Reserved.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77692
Appears in Collections:气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, China; Australian Rivers Institute and School of Engineering, Griffith University, Nathan, QLD, Australia; Woods Hole Research Center, Falmouth, MA, United States; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, United States; Laboratoire des Sciences du Climat et de l'Environnement, CEA CNRS UVSQ, Gif-sur-Yvette, France; Department of Microbiology and Plant Biology, Center for Spatial Analysis, University of Oklahoma, Norman, OK, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Global Ecology, Carnegie Institution for Science, Stanford, CA, United States; School of Natural Sciences, California State University, Monterey Bay, Seaside, CA, United States; Institute on Ecosystems and Department of Ecology, Montana State University, Bozeman, MT, United States; School of Earth Sciences and Environmental Sustainability and the Department of Civil Engineering, Construction Management, and Environmental Engineering, Northern Arizona University, Flagstaff, AZ, United States; Synthesis Research Center of Chinese Ecosystem Research Network, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Beijing, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China; Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Institute for Materials Research, Tohoku University, Sendai, Japan; College of Ecological and Environmental Engineering, Qinghai University, Xining, China

Recommended Citation:
Zhou S,, Yu B,, Schwalm C,et al. Response of Water Use Efficiency to Global Environmental Change Based on Output From Terrestrial Biosphere Models[J]. Global Biogeochemical Cycles,2017-01-01,31(11)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Zhou S]'s Articles
[, Yu B]'s Articles
[, Schwalm C]'s Articles
百度学术
Similar articles in Baidu Scholar
[Zhou S]'s Articles
[, Yu B]'s Articles
[, Schwalm C]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Zhou S]‘s Articles
[, Yu B]‘s Articles
[, Schwalm C]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.