DOI: 10.1016/j.atmosenv.2020.117374
论文题名: Seasonal changes of sources and volatility of carbonaceous aerosol at urban, coastal and forest sites in Eastern Europe (Lithuania)
作者: Masalaite A. ; Remeikis V. ; Zenker K. ; Westra I. ; Meijer H.A.J. ; Dusek U.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 225 语种: 英语
英文关键词: Aerosols
; Desorption
; Forestry
; Fossil fuels
; Isotopes
; Organic carbon
; Pollution
; Carbonaceous aerosol
; Desorption temperatures
; Fossil fuel combustion
; IRMS
; Isotopic composition
; Long range transport
; Photochemical processing
; Stable carbon isotope ratio
; Urban growth
; carbon
; carbon 13
; fossil fuel
; gasoline
; organic carbon
; aerosol
; atmospheric pollution
; biomass burning
; burning
; carbon isotope
; coastal zone
; combustion
; desorption
; forest ecosystem
; isotopic composition
; seasonality
; volatile element
; aerosol
; air pollutant
; Article
; biomass
; coal power
; combustion
; desorption
; Eastern Europe
; forest
; Lithuania
; oxidation
; photochemistry
; priority journal
; seashore
; seasonal variation
; secondary organic aerosol
; Southern Europe
; summer
; temperature
; urban area
; winter
; Eastern Europe
; Lithuania
; Southern Europe
; Western Europe
学科: Aerosol
; IRMS
; Isotopic composition
中文摘要: We measured stable carbon isotope ratios of total carbon (TC) and organic carbon (OC) in fine carbonaceous aerosol fraction sampled in August and September 2013 at urban, coastal and forest sites in Lithuania. δ13C values of TC for all three sites over the whole measurement period varied from −29.3 to −26.6‰, which is in the range of particles emitted by fossil fuel combustion in Eastern Europe. The isotopic composition at the forest and coastal site showed a similar variation during two contrasting pollution periods. δ13C values in the clean period were more variable, whereas the polluted period was characterized by a gradual enrichment in δ13C compared to the clean period. In the polluted period air masses originated from southern, southeastern or southwestern direction, indicating long-range transport of pollutants from Eastern Europe and Southern Europe to Lithuania. Oxidative processing during long-range transport or the different source signatures (e.g., enriched 13C signature of gasoline used in Western Europe vs. Eastern Europe) could cause the less negative δ13COC values during the polluted episode. δ13C for OC desorbed from the filter samples was separately measured during three different temperature steps (200 °C, 350 °C and 650 °C). OC desorbed at 200 °C had the most depleted 13C signature of around −29‰ at all three sites. A comparison with previously published data measured during the winter at the same sites showed that both TC and OC had less negative δ13C values in winter than in summer, which can be explained by the contribution of biomass/coal burning sources in winter. At the urban site δ13C of OC did not change much with increasing desorption temperature in winter, which is typical for primary sources, but in the summer δ13C of OC was depleted for lower desorption temperatures, possibly due to the influence of SOA formation. A higher fraction of more refractory OC in summer compared to winter-time suggests active photochemical processing of the primary organic aerosol as an important process at all three sites. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160431
Appears in Collections: 气候变化与战略
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作者单位: State Research Institute Center for Physical Sciences and Technology, Vilnius, Lithuania; Centre for Isotope Research (CIO), University of Groningen, Groningen, Netherlands
Recommended Citation:
Masalaite A.,Remeikis V.,Zenker K.,et al. Seasonal changes of sources and volatility of carbonaceous aerosol at urban, coastal and forest sites in Eastern Europe (Lithuania)[J]. Atmospheric Environment,2020-01-01,225