Wintertime particulate pollution episodes in an urban valley of the Western US: a case study | |
Chen, LWA (Chen, L. -W. A.)[1,2]; Watson, JG (Watson, J. G.)[1,2]; Chow, JC (Chow, J. C.)[1,2]; Green, MC (Green, M. C.)[1]; Inouye, D (Inouye, D.)[3]; Dick, K (Dick, K.)[3] | |
2012-12-30 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
卷号 | 12期号:21页码:10051-10064 |
文章类型 | 期刊论文 |
摘要 | This study investigates the causes of elevated PM2.5 episodes and potential exceedences of the US National Ambient Air Quality Standards (NAAQS) in Truckee Meadows, Nevada, an urban valley of the Western US, during winter 2009/2010, an unusually cold and snowy winter. Continuous PM2.5 mass and time-integrated chemical speciation data were acquired from a central valley monitoring site, along with meteorological measurements from nearby sites. All nine days with PM2.5 > 35 mu g m(-3) showed 24-h average temperature inversion of 1.5-4.5 degrees C and snow cover of 8-18 cm. Stagnant atmospheric conditions limited wind ventilation while highly reflective snow cover reduced daytime surface heating creating persistent inversion. Elevated ammonium nitrate (NH4NO3) and water associated with it are found to be main reasons for the PM2.5 exceedances. An effective-variance chemical mass balance (EV-CMB) receptor model using locally-derived geological profiles and inorganic/organic markers confirmed secondary NH4NO3 (27-37 %), residential wood combustion (RWC; 11-51 %), and diesel engine exhaust (7-22 %) as the dominant PM2.5 contributors. Paved road dust and de-icing materials were minor, but detectable contributors. RWC is a more important source than diesel for organic carbon (OC), but vice versa for elemental carbon (EC). A majority of secondary NH4NO3 is also attributed to RWC and diesel engines (including snow removal equipment) through oxides of nitrogen (NOx) emissions from these sources. Findings from this study may apply to similar situations experienced by other urban valleys. |
DOI | 10.5194/acp-12-10051-2012 |
收录类别 | SCI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/10137 |
专题 | 粉尘与环境研究室 |
通讯作者 | Chen, LWA (Chen, L. -W. A.)[1,2] |
作者单位 | 1.Division of Atmospheric Sciences, Desert Research Institute, 2215 Raggio Parkway, Reno, NV 89512, USA; 2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences,Xi’an, China; 3.Washoe County District Health Department Air Quality Management Division, Reno, NV, USA |
推荐引用方式 GB/T 7714 | Chen, LWA ,Watson, JG ,Chow, JC ,et al. Wintertime particulate pollution episodes in an urban valley of the Western US: a case study[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2012,12(21):10051-10064. |
APA | Chen, LWA ,Watson, JG ,Chow, JC ,Green, MC ,Inouye, D ,&Dick, K .(2012).Wintertime particulate pollution episodes in an urban valley of the Western US: a case study.ATMOSPHERIC CHEMISTRY AND PHYSICS,12(21),10051-10064. |
MLA | Chen, LWA ,et al."Wintertime particulate pollution episodes in an urban valley of the Western US: a case study".ATMOSPHERIC CHEMISTRY AND PHYSICS 12.21(2012):10051-10064. |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Wintertime particula(2679KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 请求全文 |
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