DOI: 10.1016/j.atmosenv.2017.08.050
Scopus记录号: 2-s2.0-85028473408
论文题名: Spatial clustering and meteorological drivers of summer ozone in Europe
作者: Carro-Calvo L ; , Ordóñez C ; , García-Herrera R ; , Schnell J ; L
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 167 起始页码: 496
结束页码: 510
语种: 英语
英文关键词: Air quality
; Cluster analysis
; Extreme events
; Meteorology
; Ozone
; Synoptic patterns
Scopus关键词: Air quality
; Atmospheric pressure
; Cluster analysis
; Meteorology
; Sea level
; Anticyclonic circulation
; Day-to-day variability
; Extreme events
; Interannual variability
; K-means clustering techniques
; Multiple linear models
; Spatiotemporal patterns
; Synoptic patterns
; Ozone
; ozone
; advection
; air mass
; air quality
; annual variation
; atmospheric modeling
; cluster analysis
; data set
; extreme event
; ozone
; regional pattern
; regionalization
; spatial analysis
; spatiotemporal analysis
; summer
; synoptic meteorology
; temperature profile
; westerly
; air
; Article
; Europe
; latitude
; meteorological phenomena
; meteorology
; pressure gradient
; priority journal
; sea level
; Southern Europe
; summer
; temperature
; Europe
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: We have applied the k-means clustering technique on a maximum daily 8-h running average near-surface ozone (MDA8 O3) gridded dataset over Europe at 1° × 1° resolution for summer 1998–2012. This has resulted in a spatial division of nine regions where ozone presents coherent spatiotemporal patterns. The role of meteorology in the variability of ozone at different time scales has been investigated by using daily meteorological fields from the NCEP-NCAR meteorological reanalysis. In the five regions of central-southern Europe ozone extremes (exceedances of the summer 95th percentile) occur mostly under anticyclonic circulation or weak sea level pressure gradients which trigger elevated temperatures and the recirculation of air masses. In the four northern regions extremes are associated with high-latitude anticyclones that divert the typical westerly flow at those latitudes and cause the advection of aged air masses from the south. The impact of meteorology on the day-to-day variability of ozone has been assessed by means of two different types of multiple linear models. These include as predictors meteorological fields averaged within the regions (“region-based” approach) or synoptic indices indicating the degree of resemblance between the daily meteorological fields over a large domain (25°–70° N, 35° W – 35° E) and their corresponding composites for extreme ozone days (“index-based” approach). With the first approach, a reduced set of variables, always including daily maximum temperature within the region, explains 47–66% of the variability (adjusted R2) in central-southern Europe, while more complex models are needed to explain 27–49% of the variability in the northern regions. The index-based approach yields better results for the regions of northern Europe, with adjusted R2 = 40–57%. Finally, both methodologies have also been applied to reproduce the interannual variability of ozone, with the best models explaining 66–88% of the variance in central-southern Europe and 45–66% in the north. Thus, the regionalisation carried out in this work has allowed establishing clear distinctions between the meteorological drivers of ozone in northern Europe and in the rest of the continent. These drivers are consistent across the different time scales examined (extremes, day-to-day and interannual), which gives confidence in the robustness of the results. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82574
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Departamento de Física de la Tierra II, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Madrid, Spain; Instituto de Geociencias (IGEO, CSIC-UCM), Madrid, Spain; Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States
Recommended Citation:
Carro-Calvo L,, Ordóñez C,, García-Herrera R,et al. Spatial clustering and meteorological drivers of summer ozone in Europe[J]. Atmospheric Environment,2017-01-01,167