DOI: 10.1016/j.atmosenv.2018.01.058
Scopus记录号: 2-s2.0-85041543505
论文题名: Particle growth in an isoprene-rich forest: Influences of urban, wildfire, and biogenic air masses
作者: Gunsch M ; J ; , Schmidt S ; A ; , Gardner D ; J ; , Bondy A ; L ; , May N ; W ; , Bertman S ; B ; , Pratt K ; A ; , Ault A ; P
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 178 起始页码: 255
结束页码: 264
语种: 英语
英文关键词: Forest
; Michigan
; Particle growth
; Remote
; Wildfire
Scopus关键词: Aerosols
; Atmospheric composition
; Carbon
; Energy dispersive spectroscopy
; Fires
; Forestry
; High resolution transmission electron microscopy
; Isoprene
; Meteorology
; Monoterpenes
; Oxidants
; Oxidation
; Transmission electron microscopy
; Volatile organic compounds
; X ray spectroscopy
; Forest
; Michigan
; Particle growth
; Remote
; Wildfire
; Urban growth
; carbon
; isoprene
; nitrogen dioxide
; oxidizing agent
; oxygen
; ozone
; sesquiterpene
; sulfur
; sulfur dioxide
; sulfuric acid
; terpene
; volatile agent
; volatile organic compound
; aerosol
; air mass
; biogenic emission
; cloud condensation nucleus
; forest
; oxidation
; particulate matter
; smoke
; urban area
; wildfire
; aerosol
; air
; Article
; energy dispersive X ray spectroscopy
; forest
; growth rate
; Michigan
; particle size
; photochemistry
; plume
; priority journal
; secondary organic aerosol
; smoke
; solar radiation
; summer
; transmission electron microscopy
; urban area
; wildfire
; Michigan
; 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: Growth of freshly nucleated particles is an important source of cloud condensation nuclei (CCN) and has been studied within a variety of environments around the world. However, there remains uncertainty regarding the sources of the precursor gases leading to particle growth, particularly in isoprene-rich forests. In this study, particle growth events were observed from the 14 total events (31% of days) during summer measurements (June 24 – August 2, 2014) at the Program for Research on Oxidants PHotochemistry, Emissions, and Transport (PROPHET) tower within the forested University of Michigan Biological Station located in northern Michigan. Growth events were observed within long-range transported air masses from urban areas, air masses impacted by wildfires, as well as stagnant, forested/regional air masses. Growth events observed during urban-influenced air masses were prevalent, with presumably high oxidant levels, and began midday during periods of high solar radiation. This suggests that increased oxidation of biogenic volatile organic compounds (BVOCs) likely contributed to the highest observed particle growth in this study (8 ± 2 nm h−1). Growth events during wildfire-influenced air masses were observed primarily at night and had slower growth rates (3 ± 1 nm h−1). These events were likely influenced by increased SO2, O3, and NO2 transported within the smoke plumes, suggesting a role of NO3 oxidation in the production of semi-volatile compounds. Forested/regional air mass growth events likely occurred due to the oxidation of regionally emitted BVOCs, including isoprene, monoterpenes, and sesquiterpenes, which facilitated multiday growth events also with slower rates (3 ± 2 nm h−1). Intense sulfur, carbon, and oxygen signals in individual particles down to 20 nm, analyzed by transmission electron microscopy with energy dispersive X-ray spectroscopy (TEM-EDX), suggest that H2SO4 and secondary organic aerosol contributed to particle growth. Overall, aerosol growth was frequently observed in a range of air masses (urban, wildfire, forested) and oxidant conditions (day vs. night), with rates ranging from 0.8 to 10.2 nm h−1. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82961
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Chemistry, University of Michigan, Ann Arbor, MI, United States; University of Michigan Biological Station, University of Michigan, Pellston, MI, United States; Department of Earth and Environmental Science, University of Michigan, Ann Arbor, MI, United States; Department of Chemistry, Western Michigan University, Kalamazoo, MI, United States; Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, United States; Now at Department of Environmental Science and Policy, George Mason University, Fairfax, VA, United States
Recommended Citation:
Gunsch M,J,, Schmidt S,et al. Particle growth in an isoprene-rich forest: Influences of urban, wildfire, and biogenic air masses[J]. Atmospheric Environment,2018-01-01,178