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Synoptic Weather Types and Long-range Transport Patterns for Ozone Precursors during High-ozone Events in Southern Sweden

机译:瑞典南部高臭氧事件期间臭氧前体的天气类型和远距离传输模式

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摘要

We studied long-range transport patterns and related weather types in relation to high-ozone events in southern Sweden. The aim was to deepen the understanding of the relationship between Lamb-Jenkinson weather types and surface ozone concentration variation, thus widening the application of the weather type analysis of air quality at 4 sites in this region. The long-range transport patterns associated with high-ozone events were classified into trajectories from Western Europe, Eastern Europe, and in the vicinity of southern Sweden (VIC). The VIC type, characterized by short and whirling curves, represented more than 40% of the high-ozone events at the studied rural sites. More than half of the high-ozone events occurred under high-pressure conditions, belonging to weather type A (anticyclones). The high correlation coefficient between annual counts of weather type A and those of long-range transport pattern VIC confirmed the strong link between stagnant weather conditions and high-ozone events, especially during the summer. Furthermore, a strong linear anticorrelation was detected between high-ozone events and annual counts of weather type C (cyclones) during the summer. This relationship implies that the frequency of weather type C is a useful indicator for low risk of summertime high-ozone events in southern Sweden. Moreover, the relationship between the weather type and high ozone risk may be useful in examining the potential effect of climate change on the regional air quality.
机译:我们研究了与瑞典南部高臭氧事件有关的远程运输方式和相关的天气类型。目的是加深对Lamb-Jenkinson天气类型与地面臭氧浓度变化之间关系的理解,从而扩大该地区4个地点的空气质量天气类型分析的应用。与高臭氧事件有关的远距离运输方式分为来自西欧,东欧和瑞典南部(VIC)附近的轨迹。在所研究的农村地区,VIC类型以短而回旋的曲线为特征,占高臭氧事件的40%以上。超过一半的高臭氧事件是在高压条件下发生的,属于A型天气(反气旋)。气象类型A的年计数与远距离运输方式VIC的年计数之间的高相关系数证实了停滞的天气状况与高臭氧事件之间有很强的联系,尤其是在夏季。此外,在夏季,高臭氧事件与C型天气(气旋)的年计数之间检测到强线性反相关。这种关系表明,C型天气的频率是降低瑞典南部夏季高臭氧事件风险的有用指标。而且,天气类型与高臭氧风险之间的关系可能有助于检查气候变化对区域空气质量的潜在影响。

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    《AMBIO: A Journal of the Human Environment》 |2009年第8期|p.459-465|共7页
  • 作者单位

    Lin Tang has a PhD in the field of Environmental Science. She works with ambient ozone and its precursors in urban and regional air pollution, air pollution modelling and its application. Her address: University of Gothenburg, Department of Earth Sciences, P.O. Box 460, SE-405 30 Göteborg, Sweden. E-mail: lin.tang.gu@gmail.com;

    Per Erik Karlsson is an associate professor in Plant Physiology. His main research interests are variations of air pollutant concentrations and deposition in the landscape and their impacts on forest ecosystems as well as carbon sequestration by forests. His address: Swedish Environmental Research Institute Ltd., P.O. Box 5302, SE-400 14 Göteborg, Sweden. E-mail: pererik.karlsson@ivl.se;

    Yongfeng Gu has a MSc in Atmospheric Environment. His research is focused on trajectory and cluster analysis for ozone episodes in southern Sweden. His address: University of Gothenburg, Department of Earth Sciences, P.O. Box 460, SE-405 30 Göteborg, Sweden. E-mail: guyongf@hotmail.com;

    Deliang Chen is a professor in Physical Meteorology at University of Gothenburg. His research area deals with regional climate change and variability in Sweden and China, statistical and dynamic downscaling, climate dynamics, boundary-layer and local climatology with emphasis on surface processes, air pollution, and geostatistics. He is now the Executive Director of the International Council for Science (ICSU). His address: 5 rue Auguste Vacquerie, F-75116 Paris, France. E-mail: deliang@gvc.gu.se;

    Peringe Grennfelt is a Scientific Director of IVL (Swedish Environmental Research Institute) and adjunct professor in atmospheric chemistry at University of Gothenburg. His main interest is atmospheric chemistry in relation to regional air pollution and its policy development. His address: Swedish Environmental Research Institute, P.O. Box 5302, SE-40014 Göteborg, Sweden. E-mail: peringe.grennfelt@ivl.se;

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