气候变化领域集成服务门户(CCPortal): Temporal and spatial analysis of ozone concentrations in Europe based on timescale decomposition and a multi-clustering approach

CCPortal

DOI	10.5194/acp-20-9051-2020
	Temporal and spatial analysis of ozone concentrations in Europe based on timescale decomposition and a multi-clustering approach
	Boleti E.; Hueglin C.; K. Grange S.; Takahama S.
发表日期	2020
ISSN	1680-7316
起始页码	9051
结束页码	9066
卷号	20 期号:14
英文摘要	Air quality measures that were implemented in Europe in the 1990s resulted in reductions of ozone precursor concentrations. In this study, the effect of these reductions on ozone is investigated by analyzing surface measurements of this pollutant for the time period between 2000 and 2015. Using a nonparametric timescale decomposition methodology, the long-term, seasonal and short-term variation in ozone observations were extracted. A clustering algorithm was applied to the different timescale variations, leading to a classification of sites across Europe based on the temporal characteristics of ozone. The clustering based on the long-term variation resulted in a site-type classification, while a regional classification was obtained based on the seasonal and short-term variations. Long-term trends of deseasonalized mean and meteo-adjusted peak ozone concentrations were calculated across large parts of Europe for the time period 2000-2015. A multidimensional scheme was used for a detailed trend analysis, based on the identified clusters, which reflect precursor emissions and meteorological influence either on the inter-annual or the short-term timescale. Decreasing mean ozone concentrations at rural sites and increasing or stabilizing at urban sites were observed. At the same time, downward trends for peak ozone concentrations were detected for all site types. In addition, a reduction of the amplitude in the seasonal cycle of ozone and a shift in the occurrence of the seasonal maximum towards earlier time of the year were observed. Finally, a reduced sensitivity of ozone to temperature was identified. It was concluded that long-term trends of mean and peak ozone concentrations are mostly controlled by precursor emissions changes, while seasonal cycle trends and changes in the sensitivity of ozone to temperature are among other factors driven by regional climatic conditions. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	air quality; amplitude; atmospheric pollution; cluster analysis; concentration (composition); decomposition analysis; ozone; spatial analysis; temporal analysis; timescale; trend analysis
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247611
作者单位	Empa Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland; Epfl École Polytechnique Fédérale de Lausanne, Route Cantonale, Lausanne, 1015, Switzerland; Psi Paul Scherrer Institute, Villigen, 5232, Switzerland; Wolfson Atmospheric Chemistry Laboratories, University of York, York, YO10 5DD, United Kingdom
推荐引用方式 GB/T 7714	Boleti E.,Hueglin C.,K. Grange S.,et al. Temporal and spatial analysis of ozone concentrations in Europe based on timescale decomposition and a multi-clustering approach[J],2020,20(14).
APA	Boleti E.,Hueglin C.,K. Grange S.,&Takahama S..(2020).Temporal and spatial analysis of ozone concentrations in Europe based on timescale decomposition and a multi-clustering approach.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(14).
MLA	Boleti E.,et al."Temporal and spatial analysis of ozone concentrations in Europe based on timescale decomposition and a multi-clustering approach".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.14(2020).