气候变化领域集成服务门户(CCPortal): Modeled and measured near-road PM2.5 concentrations: Indianapolis and Providence cases

CCPortal

DOI	10.1016/j.atmosenv.2020.117775
	Modeled and measured near-road PM2.5 concentrations: Indianapolis and Providence cases
	Craig K.J.; Baringer L.M.; Chang S.-Y.; McCarthy M.C.; Bai S.; Seagram A.F.; Ravi V.; Landsberg K.; Eisinger D.S.
发表日期	2020
ISSN	1352-2310
卷号	240
英文摘要	Modeling analyses were developed to evaluate near-road PM2.5 concentrations predicted by the AERMOD dispersion modeling chain under real-world conditions, and to assess the sensitivity of modeled near-road concentrations to the choice of dispersion model (AERMOD or CAL3QHCR), meteorological data, and travel data processing approach. We evaluate PM2.5 monitoring sites near major freeways in Indianapolis, Indiana (for 2016) and Providence, Rhode Island (for 2015–2016). The modeling analyses are built upon bottom-up estimates of temporally and spatially resolved roadway PM2.5 emissions based on traffic monitoring data and local vehicle fleet emission factors. The dispersion model simulations use local meteorological data collected at or close to the near-road monitoring sites. Predictions involved a modeling chain that included travel activity data processing, emissions modeling (MOVES and AP-42), and air quality dispersion modeling. We estimated the difference between PM2.5 concentrations at the near-road monitor and at nearby urban air quality monitoring sites (the measured near-road “increment”), and compared modeled results to the measured increments. Based on monitoring data, estimates of multi-day-averaged near-road PM2.5 increments were 0.9 ± 0.6 μg/m3 at Indianapolis and 1.4 ± 0.2 μg/m3 at Providence (where the uncertainty represents the 95% confidence interval on the mean value), and were comparable to measured PM2.5 increments at these sites in the near-road literature. Modeled roadway contributions to multi-day-averaged near-road concentrations substantially exceeded measured values based on the near-road monitoring data. The average near-road PM2.5 increment modeled with AERMOD was more than 300% (factor of four) larger than the measured increment at Indianapolis, and more than 500% (factor of six) larger than the measured increment at Providence. These biases reflect cumulative uncertainty throughout the near-road PM2.5 modeling chain. The emissions modeling component may have contributed to the modeling chain biases in two ways. First, the relative contribution of modeled non-exhaust emissions (PM2.5 brake wear, tire wear, and re-suspended road dust) compared to tailpipe exhaust emissions was higher than what has been documented in several published studies. Second, other research findings indicate that the U.S. EPA MOVES2014 model may over-predict tailpipe PM2.5 exhaust. The dispersion modeling component may have also contributed to the modeling chain biases. For example, when local meteorological data were used, AERMOD results were relatively insensitive to wind direction on a daily averaged basis; as a result, modeled concentrations exceeded measured values regardless of whether the near-road monitor was upwind or downwind of the roadway. In summary, this work provides a unique evaluation of PM2.5 concentrations predicted by the near-road modeling chain, and provides valuable information to understand potential sources of uncertainty in the near-road modeling process. © Elsevier Ltd
关键词	AERMOD Air pollution Dispersion modeling Emissions modeling Near-road Particulate matter
语种	英语
scopus关键词	Air quality; Dispersions; Exhaust systems (engine); Fleet operations; Meteorology; Monitoring; Roads and streets; Uncertainty analysis; Urban growth; Wear of materials; Air quality dispersion models; Confidence interval; Dispersion modeling; Meteorological data; PM2.5 concentration; Processing approach; Relative contribution; Spatially resolved; Predictive analytics; air quality; concentration (composition); confidence interval; data processing; dispersion; exhaust emission; particulate matter; roadside environment; wind direction; air pollution; air quality; article; highway; Indiana; particulate matter; prediction; Rhode Island; simulation; travel; uncertainty; Indiana; Indianapolis; Rhode Island; 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/248977
作者单位	Sonoma Technology, Inc., Petaluma, CA 94954, United States; Washington State Department of Transportation, Olympia, WA 98504, United States
推荐引用方式 GB/T 7714	Craig K.J.,Baringer L.M.,Chang S.-Y.,et al. Modeled and measured near-road PM2.5 concentrations: Indianapolis and Providence cases[J],2020,240.
APA	Craig K.J..,Baringer L.M..,Chang S.-Y..,McCarthy M.C..,Bai S..,...&Eisinger D.S..(2020).Modeled and measured near-road PM2.5 concentrations: Indianapolis and Providence cases.ATMOSPHERIC ENVIRONMENT,240.
MLA	Craig K.J.,et al."Modeled and measured near-road PM2.5 concentrations: Indianapolis and Providence cases".ATMOSPHERIC ENVIRONMENT 240(2020).