气候变化领域集成服务门户(CCPortal): Assessing the value of air stagnation indices to reproduce PM10 variability in Europe

CCPortal

DOI	10.1016/j.atmosres.2020.105258
	Assessing the value of air stagnation indices to reproduce PM10 variability in Europe
	Garrido-Perez J.M.; García-Herrera R.; Ordóñez C.
发表日期	2021
ISSN	0169-8095
卷号	248
英文摘要	Different air stagnation indices (ASIs) have been proposed to measure the atmospheric diffusion conditions. This paper undertakes a comparative analysis of three ASIs and explores their ability to capture the conditions conducive to elevated PM10 (particulate matter ≤10 μm) at 306 background sites in Europe for the winter and summer months of 2000–2012. Despite the similar spatial patterns of stagnation frequency found for the three ASIs, the use of different meteorological variables to characterize the dilution capacity of the atmosphere (wind speeds at 10 m and 500 hPa, boundary layer height and ventilation in the boundary layer) leads to important differences in the seasonal cycles. Moreover, the response of the PM10 concentrations to stagnation varies with the ASI. Winter PM10 anomalies under stagnant conditions are of the same order of magnitude (on average 17.2 to 18.6 μg m−3, around 60% of the mean values) for the three ASIs. The anomalies are considerably smaller (3.8–5.7 μg m−3, around 19–28%) in summer, when one of the indices outperforms the others at most locations. The dependence of the PM10 concentrations on the ASI components is also evaluated by using correlations and generalized additive models. The results indicate that the consideration of the large-scale circulation is particularly relevant in summer, explaining the different ASI performances during this season. We have also identified some potential improvements that could be made to two of the ASIs. Nevertheless, since the three ASIs are based on fixed thresholds, they cannot deal with non-linear relationships, which limits their ability to explain PM10 variability. © 2020 Elsevier B.V.
英文关键词	Air pollution; Air stagnation; Generalized additive model; Meteorology; PM10
语种	英语
scopus关键词	Boundary layer flow; Atmospheric diffusion; Boundary layer heights; Comparative analysis; Generalized additive model; Large-scale circulation; Meteorological variables; Non-linear relationships; PM10 concentration; Boundary layers; atmospheric pollution; concentration (composition); meteorology; numerical model; particulate matter; seasonal variation; Europe
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141684
作者单位	Dpto. Física de la Tierra y Astrofísica, Universidad Complutense de Madrid, Madrid, Spain; Instituto de Geociencias (IGEO), CSIC-UCM, Madrid, Spain
推荐引用方式 GB/T 7714	Garrido-Perez J.M.,García-Herrera R.,Ordóñez C.. Assessing the value of air stagnation indices to reproduce PM10 variability in Europe[J],2021,248.
APA	Garrido-Perez J.M.,García-Herrera R.,&Ordóñez C..(2021).Assessing the value of air stagnation indices to reproduce PM10 variability in Europe.Atmospheric Research,248.
MLA	Garrido-Perez J.M.,et al."Assessing the value of air stagnation indices to reproduce PM10 variability in Europe".Atmospheric Research 248(2021).