Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab2603 |
Response of ecosystem intrinsic water use efficiency and gross primary productivity to rising vapor pressure deficit | |
Zhang, Quan1,2; Ficklin, Darren L.3; Manzoni, Stefano4,5; Wang, Lixin6; Way, Danielle7; Phillips, Richard P.8; Novick, Kimberly A.2 | |
2019-07-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2019 |
卷号 | 14期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; Sweden; Canada |
英文摘要 | Elevated vapor pressure deficit (VPD) due to drought and warming is well-known to limit canopy stomatal and surface conductance, but the impacts of elevated VPD on ecosystem gross primary productivity (GPP) are less clear. The intrinsic water use efficiency (iWUE), defined as the ratio of carbon (C) assimilation to stomatal conductance, links vegetation C gain and water loss and is a key determinant of how GPP will respond to climate change. While it is well-established that rising atmospheric CO2 increases ecosystem iWUE, historic and future increases in VPD caused by climate change and drought are often neglected when considering trends in ecosystem iWUE. Here, we synthesize long-term observations of C and water fluxes from 28 North American FLUXNET sites, spanning eight vegetation types, to demonstrate that ecosystem iWUE increases consistently with rising VPD regardless of changes in soil moisture. Another way to interpret this result is that GPP decreases less than surface conductance with increasing VPD. We also project how rising VPD will impact iWUE into the future. Results vary substantially from one site to the next; in a majority of sites, future increases in VPD (RCP 8.5, highest emission scenario) are projected to increase iWUE by 5%-15% by 2050, and by 10%-35% by the end of the century. The increases in VPD owing to elevated global temperatures could be responsible for a 0.13% year(-1) increase in ecosystem iWUE in the future. Our results highlight the importance of considering VPD impacts on iWUE independently of CO2 impacts. |
英文关键词 | hydrologic stress FLUXNET stomatal closure water use |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000475442000007 |
WOS关键词 | CARBON-DIOXIDE ; STOMATAL CONDUCTANCE ; EDDY COVARIANCE ; CRITICAL-ISSUES ; TREE GROWTH ; EXCHANGE ; EVAPOTRANSPIRATION ; ASSIMILATION ; EVAPORATION ; SENSITIVITY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/184541 |
专题 | 气候变化 |
作者单位 | 1.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Hubei, Peoples R China; 2.Indiana Univ, Sch Publ & Environm Affairs, Bloomington, IN 47405 USA; 3.Indiana Univ, Dept Geog, Bloomington, IN 47405 USA; 4.Stockholm Univ, Dept Phys Geog, Stockholm, Sweden; 5.Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden; 6.IUPUI, Dept Earth Sci, Indianapolis, IN USA; 7.Univ Western Ontario, Dept Biol, London, ON, Canada; 8.Indiana Univ, Dept Biol, Bloomington, IN USA |
推荐引用方式 GB/T 7714 | Zhang, Quan,Ficklin, Darren L.,Manzoni, Stefano,et al. Response of ecosystem intrinsic water use efficiency and gross primary productivity to rising vapor pressure deficit[J]. ENVIRONMENTAL RESEARCH LETTERS,2019,14(7). |
APA | Zhang, Quan.,Ficklin, Darren L..,Manzoni, Stefano.,Wang, Lixin.,Way, Danielle.,...&Novick, Kimberly A..(2019).Response of ecosystem intrinsic water use efficiency and gross primary productivity to rising vapor pressure deficit.ENVIRONMENTAL RESEARCH LETTERS,14(7). |
MLA | Zhang, Quan,et al."Response of ecosystem intrinsic water use efficiency and gross primary productivity to rising vapor pressure deficit".ENVIRONMENTAL RESEARCH LETTERS 14.7(2019). |
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