气候变化领域集成服务门户(CCPortal): Meteorological normalization of NO2 concentrations in the Province of Bolzano (Italian Alps)

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DOI	10.1016/j.atmosenv.2020.118048
	Meteorological normalization of NO2 concentrations in the Province of Bolzano (Italian Alps)
	Falocchi M.; Zardi D.; Giovannini L.
发表日期	2021
ISSN	1352-2310
卷号	246
英文摘要	Pollutant concentrations in the atmosphere are controlled not only by emissions, but also by meteorological processes. As a consequence, adverse atmospheric conditions may hinder the effects of policies intended to improve air quality through reduction of emissions. In particular, low ventilation conditions and temperature inversions may significantly inhibit pollutant transport and mixing, determining high concentrations close to the ground. In order to disentangle the contribution of weather conditions on observed pollutant concentrations, meteorological normalization techniques can be applied. In this study, a normalization procedure based on a random forest predictive model is applied to 8-year–long series of nitrogen dioxide (NO2) concentrations measured at five air quality stations in the Province of Bolzano (Italian Alps). The normalization is performed on daily–averages of NO2 concentrations, related to a dataset composed of time variables and meteorological data from seven weather stations and one temperature profiler. The strong dependence of observed NO2 concentrations on atmospheric variables (i.e. air temperature, atmospheric stability and wind speed) measured at the valley floor justifies the application of a normalization procedure. The resulting normalized time series of NO2 concentrations, instead, clearly display changes in correspondence of roadworks or other measures capable of modifying the emission regime, and allow to address the reliability of the applied procedure. © 2020
关键词	Air quality Complex mountainous terrain Meteorological normalization Nitrogen dioxide Random Forest Valley
语种	英语
scopus关键词	Air quality; Decision trees; Meteorology; Nitrogen oxides; Predictive analytics; Wind; Atmospheric conditions; Atmospheric stability; Atmospheric variables; Meteorological data; Meteorological normalization; Pollutant concentration; Reduction of emissions; Temperature inversions; Atmospheric temperature; nitrogen dioxide; air quality; atmospheric pollution; concentration (composition); forest floor; nitrogen dioxide; pollutant transport; soil emission; time series analysis; ventilation; wind velocity; air pollution; air quality; air temperature; city; decision tree; explanatory variable; Italy; meteorology; pollutant; pollution transport; prediction; priority journal; random forest; reliability; suburban area; time series analysis; traffic; weather; wind speed; Alps; Bolzano; Italy; Trentino-Alto Adige
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/248727
作者单位	Atmospheric Physics Group, Department of Civil Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, Trento, 38123, Italy; C3A - Center Agriculture Food Environment, University of Trento, San Michele all'Adige, Via Edmund Mach 1, Trento, 38010, Italy
推荐引用方式 GB/T 7714	Falocchi M.,Zardi D.,Giovannini L.. Meteorological normalization of NO2 concentrations in the Province of Bolzano (Italian Alps)[J],2021,246.
APA	Falocchi M.,Zardi D.,&Giovannini L..(2021).Meteorological normalization of NO2 concentrations in the Province of Bolzano (Italian Alps).ATMOSPHERIC ENVIRONMENT,246.
MLA	Falocchi M.,et al."Meteorological normalization of NO2 concentrations in the Province of Bolzano (Italian Alps)".ATMOSPHERIC ENVIRONMENT 246(2021).