气候变化领域集成服务门户(CCPortal): Day-of-week patterns for ultrafine particulate matter components at four sites in California

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DOI	10.1016/j.atmosenv.2019.117088
	Day-of-week patterns for ultrafine particulate matter components at four sites in California
	Xue W.; Xue J.; Shirmohammadi F.; Sioutas C.; Lolinco A.; Hasson A.; Kleeman M.J.
发表日期	2020
ISSN	13522310
卷号	222
英文摘要	Ultrafine particulate matter (PM0.1) samples were collected during three-day averaging periods over an annual cycle at four sites across California: Los Angeles, East Oakland, San Pablo, and Fresno. PM0.1 samples were analyzed for thermal carbon fractions using a thermal-optical carbon analyzer and trace elements using ICP-MS. A statistical analysis of the day-of-week trends for 15 PM0.1 components reveals location-specific patterns along with important general trends for UFP concentrations. PM0.1 elemental carbon (EC) concentrations are elevated in the middle of the week consistent with increased activity for diesel engines during this time period. Just as significantly, PM0.1 organic carbon (OC) concentrations do not exhibit a day-of-week pattern. Since OC accounts for the majority of the PM0.1 total mass, the lack of a day-of-week pattern for PM0.1 OC suggests that diesel engines do not dominate total PM0.1 mass in California. A paired t-test constructed using measurements on weekends compared to measurements immediately preceding or immediately following the weekend showed that PM0.1 potassium (K) and rubidium (Rb) concentrations were elevated on weekends. This pattern is consistent with increased biomass combustion on weekends (a previously unknown exposure pattern for UFPs). The two closest sampling locations (East Oakland and San Pablo) had the greatest number of UFP components with identical weekly trends, but even at these locations only 4 out of 15 components displayed the exact same day-of-week profiles. Less similarity was observed in measured day-of-week profiles for UFP components at other sites. The heterogeneity between sites suggests that the details of UFP concentrations at each location reflect the mixture of sources immediately adjacent to that site. By extension, individual neighborhoods across California will each experience unique day-of-week concentration profiles for UFP components that reflect the surrounding sources. These factors must be considered when estimating population exposure to ultrafine particles during future health effects studies. © 2019 Elsevier Ltd
学科领域	Combustion; Diesel engines; Location; Organic carbon; Trace elements; Biomass combustion; Concentration profiles; Elemental carbon; Population exposure; Sampling location; Thermal-optical carbon analyzer; Ultra-fine particulate matters; Ultrafine particle; Particles (particulate matter); carbon; organic carbon; potassium; rubidium; trace element; annual cycle; biomass; combustion; concentration (composition); elemental carbon; organic carbon; particulate matter; pollutant source; air pollution; air quality; air sampling; biomass; California; chemical composition; circannual rhythm; combustion; concentration (parameter); diesel engine; inductively coupled plasma mass spectrometry; particulate matter; population exposure; priority journal; seasonal variation; California; United States
语种	英语
scopus关键词	Combustion; Diesel engines; Location; Organic carbon; Trace elements; Biomass combustion; Concentration profiles; Elemental carbon; Population exposure; Sampling location; Thermal-optical carbon analyzer; Ultra-fine particulate matters; Ultrafine particle; Particles (particulate matter); carbon; organic carbon; potassium; rubidium; trace element; annual cycle; biomass; combustion; concentration (composition); elemental carbon; organic carbon; particulate matter; pollutant source; air pollution; air quality; air sampling; biomass; California; chemical composition; circannual rhythm; combustion; concentration (parameter); diesel engine; inductively coupled plasma mass spectrometry; particulate matter; population exposure; priority journal; seasonal variation; California; United States
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120830
作者单位	Department of Civil and Environmental Engineering, University of California – Davis, Davis, CA, United States; Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA, United States; Department of Chemistry, California State University – Fresno, Fresno, CA, United States
推荐引用方式 GB/T 7714	Xue W.,Xue J.,Shirmohammadi F.,et al. Day-of-week patterns for ultrafine particulate matter components at four sites in California[J],2020,222.
APA	Xue W..,Xue J..,Shirmohammadi F..,Sioutas C..,Lolinco A..,...&Kleeman M.J..(2020).Day-of-week patterns for ultrafine particulate matter components at four sites in California.Atmospheric Environment,222.
MLA	Xue W.,et al."Day-of-week patterns for ultrafine particulate matter components at four sites in California".Atmospheric Environment 222(2020).