DOI: 10.1016/j.atmosenv.2018.01.026
Scopus记录号: 2-s2.0-85045397528
论文题名: Isoprene emission response to drought and the impact on global atmospheric chemistry
作者: Jiang X ; , Guenther A ; , Potosnak M ; , Geron C ; , Seco R ; , Karl T ; , Kim S ; , Gu L ; , Pallardy S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 183 起始页码: 69
结束页码: 83
语种: 英语
英文关键词: Biogenic isoprene emissions
; Drought
; Modelling
Scopus关键词: Atmospheric chemistry
; Drought
; Isoprene
; Models
; Ozone
; Photosynthesis
; Physiological models
; Plants (botany)
; Soil moisture
; Solar radiation
; Driving variables
; Earth system model
; Environmental conditions
; Field measurement
; Isoprene emission
; Physiological effects
; Plant water stress
; Short-term variations
; Soil pollution
; isoprene
; oxidizing agent
; ozone
; atmospheric chemistry
; biogenic emission
; climate modeling
; drought stress
; emission
; environmental conditions
; environmental impact
; isoprene
; air pollution
; algorithm
; Article
; atmosphere
; comparative study
; drought
; drought stress
; environmental impact
; field study
; leaf area
; leaf water potential
; measurement
; nonhuman
; oxidative stress
; ozone depletion
; photosynthesis
; priority journal
; seasonal variation
; simulation
; soil property
; summer
; surface property
; Missouri
; 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: Biogenic isoprene emissions play a very important role in atmospheric chemistry. These emissions are strongly dependent on various environmental conditions, such as temperature, solar radiation, plant water stress, ambient ozone and CO2 concentrations, and soil moisture. Current biogenic emission models (i.e., Model of Emissions of Gases and Aerosols from Nature, MEGAN) can simulate emission responses to some of the major driving variables, such as short-term variations in temperature and solar radiation, but the other factors are either missing or poorly represented. In this paper, we propose a new modelling approach that considers the physiological effects of drought stress on plant photosynthesis and isoprene emissions for use in the MEGAN3 biogenic emission model. We test the MEGAN3 approach by integrating the algorithm into the existing MEGAN2.1 biogenic emission model framework embedded into the global Community Land Model of the Community Earth System Model (CLM4.5/CESM1.2). Single-point simulations are compared against available field measurements at the Missouri Ozarks AmeriFlux (MOFLUX) field site. The modelling results show that the MEGAN3 approach of using of a photosynthesis parameter (Vcmax) and soil wetness factor (βt) to determine the drought activity factor leads to better simulated isoprene emissions in non-drought and drought periods. The global simulation with the MEGAN3 approach predicts a 17% reduction in global annual isoprene emissions, in comparison to the value predicted using the default CLM4.5/MEGAN2.1 without any drought effect. This reduction leads to changes in surface ozone and oxidants in the areas where the reduction of isoprene emissions is observed. Based on the results presented in this study, we conclude that it is important to simulate the drought-induced response of biogenic isoprene emission accurately in the coupled Earth System model. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82871
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth System Science, University of California – Irvine, Irvine, CA, United States; Environmental Science and Studies, DePaul University, Chicago, IL, United States; National Risk Management Research Laboratory, Air and Energy Management Division, U.S. Environment Protection Agency, Research Triangle Park, NC, United States; Institute of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innrain 52, Innsbruck, Austria; Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States; School of Natural Resources, University of Missouri, Columbia, MO, United States
Recommended Citation:
Jiang X,, Guenther A,, Potosnak M,et al. Isoprene emission response to drought and the impact on global atmospheric chemistry[J]. Atmospheric Environment,2018-01-01,183