DOI: 10.1016/j.atmosenv.2016.10.038
Scopus记录号: 2-s2.0-84994017737
论文题名: Characteristics, sources and evolution of fine aerosol (PM1) at urban, coastal and forest background sites in Lithuania
作者: Masalaite A ; , Holzinger R ; , Remeikis V ; , Röckmann T ; , Dusek U
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 148 起始页码: 62
结束页码: 76
语种: 英语
英文关键词: Aerosol
; IRMS
; Isotopic composition
; PTR-MS
Scopus关键词: Aerosols
; Atmospheric aerosols
; Atmospheric temperature
; Biomass
; Chemical compounds
; Combustion
; Desorption
; Forestry
; Fossil fuels
; Isotopes
; Nitrogen
; Nitrogen compounds
; Organic compounds
; Refractory materials
; Urban growth
; Desorption temperatures
; Individual organic compounds
; IRMS
; Isotopic composition
; Organic nitrogen compounds
; Photochemical processing
; PTR-MS
; Secondary organic aerosols
; Organic carbon
; acetic acid
; carbon
; carbon 13
; diesel fuel
; fossil fuel
; gasoline
; heavy ion
; hydrocarbon
; isotope
; nitrogen
; organic carbon
; organonitrogen derivative
; aerosol
; aging
; biomass burning
; chemical composition
; coal combustion
; coastal zone
; combustion
; concentration (composition)
; fossil fuel
; hydrocarbon
; isotopic composition
; organic compound
; urban area
; aerosol
; analytic method
; Article
; biomass
; chemical composition
; combustion
; decomposition
; elemental analysis
; evolution
; forest
; Lithuania
; mass spectrometry
; particulate matter
; photochemistry
; priority journal
; secondary organic aerosol
; temperature
; thermography
; urban area
; winter
; Lithuania
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: The chemical and isotopic composition of organic aerosol (OA) samples collected on PM1 filters was determined as a function of desorption temperature to investigate the main sources of organic carbon and the effects of photochemical processing on atmospheric aerosol. The filter samples were collected at an urban (54°38' N, 25°18' E), coastal (55°55' N, 21°00' E) and forest (55°27' N, 26°00’ E) site in Lithuania in March 2013. They can be interpreted as winter-time samples because the monthly averaged temperature was −4 °C. The detailed chemical composition of organic compounds was analysed with a thermal desorption PTR-MS. The mass concentration of organic aerosol at the forest site was roughly by a factor of 30 lower than at the urban and coastal site. This fact could be an indication that in this cold month the biogenic secondary organic aerosol (SOA) formation was very low. Moreover, the organic aerosol collected at the forest site was more refractory and contained a larger fraction of heavy molecules with m/z > 200. The isotopic composition of the aerosol was used to differentiate the two main sources of organic aerosol in winter, i.e. biomass burning (BB) and fossil fuel (FF) combustion. Organic aerosol from biomass burning is enriched in 13C compared to OA from fossil fuel emissions. δ13COC values of the OA samples showed a positive correlation with the mass fraction of several individual organic compounds. Most of these organic compounds contained nitrogen indicating that organic nitrogen compounds formed during the combustion of biomass may be indicative of BB. Other compounds that showed negative correlations with δ13COC were possibly indicative of FF. These compounds included heavy hydrocarbons and were on the average less oxidized than the bulk organic carbon. The correlation of δ13COC and the O/C ratio was positive at low but negative at high desorption temperatures at the forest site. We propose that this might be due to photochemical processing of OA. This processing can lead to accumulation of carbon in the more refractory organic fraction that is depleted in 13C compared with the less refractory organic fraction. Detailed laboratory experiments are necessary to further investigate the aging of aerosol particles before firm conclusions can be drawn. © 2016 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82619
Appears in Collections: 气候变化事实与影响
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作者单位: State Research Institute Center for Physical Sciences and Technology, Vilnius, Lithuania; Institute for Marine and Atmospheric Research Utrecht (IMAU), Utrecht University, Netherlands; Centre for Isotope Research (CIO), University of Groningen, Groningen, Netherlands
Recommended Citation:
Masalaite A,, Holzinger R,, Remeikis V,et al. Characteristics, sources and evolution of fine aerosol (PM1) at urban, coastal and forest background sites in Lithuania[J]. Atmospheric Environment,2017-01-01,148