DOI: 10.1016/j.atmosenv.2013.11.055
Scopus记录号: 2-s2.0-84890824309
论文题名: Observed and modeled ecosystem isoprene fluxes from an oak-dominated temperate forest and the influence of drought stress
作者: Potosnak M ; J ; , LeStourgeon L ; , Pallardy S ; G ; , Hosman K ; P ; , Gu L ; , Karl T ; , Geron C ; , Guenther A ; B
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 84 起始页码: 314
结束页码: 322
语种: 英语
英文关键词: Biosphere-atmosphere interactions
; Drought stress
; Ecosystem fluxes
; Eddy covariance
; Isoprene
Scopus关键词: Biosphere-atmosphere interactions
; Broadleaf deciduous forests
; Drought stress
; Ecosystem fluxes
; Eddy covariance
; Temperate forests
; Time-dependent response
; University of Missouri
; Drought
; Ecosystems
; Isoprene
; Forestry
; isoprene
; algorithm
; atmosphere-biosphere interaction
; biogenic emission
; broad-leaved forest
; deciduous forest
; deciduous tree
; drought stress
; ecosystem dynamics
; eddy covariance
; flux measurement
; growing season
; isoprene
; temperate forest
; time dependent behavior
; timescale
; uncertainty analysis
; water stress
; algorithm
; article
; canopy
; comparative study
; controlled study
; drought stress
; ecosystem
; model
; nonhuman
; observational study
; priority journal
; season
; temperate deciduous forest
; temperature
; water stress
; Drought
; Ecosystems
; Forestry
; Isoprene
; Arkansas
; Missouri
; Ozark National Forest
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Ecosystem fluxes of isoprene emissions were measured during the majority of the 2011 growing season at the University of Missouri's Baskett Wildlife Research and Education Area in central Missouri, USA (38.7° N, 92.2° W). This broadleaf deciduous forest is typical of forests common in the Ozarks region of the central United States. The goal of the isoprene flux measurements was to test our understanding of the controls on isoprene emission from the hourly to the seasonal timescale using a state-of-the-art emission model, MEGAN (Model of Emissions of Gases and Aerosols from Nature). Isoprene emission rates from the forest were very high with a maximum of 53.3mgm-2h-1 (217nmolm-2s-1), which to our knowledge exceeds all other reports of canopy-scale isoprene emission. The fluxes showed a clear dependence on the previous temperature and light regimes, which was successfully captured by the existing algorithms in MEGAN. During a period of drought, MEGAN was unable to reproduce the time-dependent response of isoprene emission to water stress. Overall, the performance of MEGAN was robust and could explain 90% of the observed variance in the measured fluxes, but the response of isoprene emission to drought stress is a major source of uncertainty. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80786
Appears in Collections: 气候变化事实与影响
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作者单位: DePaul University, Department of Environmental Science and Studies, 1110 W Belden Ave, Chicago, IL 60614, United States; University of Missouri, Department of Forestry, Columbia, MO 65211, United States; Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, TN 37831, United States; University of Innsbruck, Institute of Meteorology and Geophysics, A-6020 Innsbruck, Austria; U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Air pollution Prevention and Control Division, Research Triangle Park, NC 27711, United States; Pacific Northwest National Laboratory, Atmospheric Sciences and Global Change Division, Richland, WA 99352, United States
Recommended Citation:
Potosnak M,J,, LeStourgeon L,et al. Observed and modeled ecosystem isoprene fluxes from an oak-dominated temperate forest and the influence of drought stress[J]. Atmospheric Environment,2014-01-01,84