Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD026519 |
Using radiocarbon to constrain black and organic carbon aerosol sources in Salt Lake City | |
Mouteva, Gergana O.1; Randerson, James T.1; Fahrni, Simon M.1,2; Bush, Susan E.3; Ehleringer, James R.3; Xu, Xiaomei1; Santos, Guaciara M.1; Kuprov, Roman4; Schichtel, Bret A.5; Czimczik, Claudia I.1 | |
2017-09-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:18 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Switzerland |
英文摘要 | Black carbon (BC) and organic carbon (OC) aerosols are important components of fine particulate matter (PM2.5) in polluted urban environments. Quantifying the contribution of fossil fuel and biomass combustion to BC and OC concentrations is critical for developing and validating effective air quality control measures and climate change mitigation policy. We used radiocarbon (C-14) to measure fossil and contemporary biomass contributions to BC and OC at three locations in Salt Lake City, Utah, USA, during 2012-2014, including during winter inversion events. Aerosol filters were analyzed with the Swiss_4S thermal-optical protocol to isolate BC. We measured fraction modern (f(M)) of BC and total carbon in PM2.5 with accelerator mass spectrometry and derived the f(M) of OC using isotope mass balance. Combined with C-14 information of end-member composition, our data set of 31 C-14 aerosol measurements provided a baseline of the fossil and contemporary biomass components of carbonaceous aerosol. We show that fossil fuels were the dominant source of carbonaceous aerosol during winter, contributing 88% (80-98%) of BC and 58% (48-69%) of OC. While the concentration of both BC and OC increased during inversion events, the relative source contributions did not change. The sources of BC also did not vary throughout the year, while OC had a considerably higher contemporary biomass component in summer at 62% (49-76%) and was more variable. Our results suggest that in order to reduce PM2.5 levels in Salt Lake City to meet national standards, a more stringent policy targeting mobile fossil fuel sources may be necessary. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416388000018 |
WOS关键词 | AMBIENT AIR-POLLUTION ; FINE PARTICULATE MATTER ; LONG-TERM EXPOSURE ; NON-FOSSIL SOURCES ; SOURCE APPORTIONMENT ; ELEMENTAL CARBON ; CARDIOVASCULAR-DISEASE ; ISOTOPIC COMPOSITION ; FIRE EMISSIONS ; LUNG-FUNCTION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32413 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA; 2.ETH, Zurich, Switzerland; 3.Univ Utah, Dept Biol, Salt Lake City, UT 84112 USA; 4.Utah Dept Environm Qual, Div Air Qual, Salt Lake City, UT USA; 5.Natl Pk Serv, Washington, DC 20240 USA |
推荐引用方式 GB/T 7714 | Mouteva, Gergana O.,Randerson, James T.,Fahrni, Simon M.,et al. Using radiocarbon to constrain black and organic carbon aerosol sources in Salt Lake City[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(18). |
APA | Mouteva, Gergana O..,Randerson, James T..,Fahrni, Simon M..,Bush, Susan E..,Ehleringer, James R..,...&Czimczik, Claudia I..(2017).Using radiocarbon to constrain black and organic carbon aerosol sources in Salt Lake City.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(18). |
MLA | Mouteva, Gergana O.,et al."Using radiocarbon to constrain black and organic carbon aerosol sources in Salt Lake City".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.18(2017). |
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