Ozone Trends in the United Kingdom over the Last 30 Years
Ozone Trends in the United Kingdom over the Last 30 Years
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DOI：
10.3390/atmos11050534
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发表时间：
2020-05-01
期刊：
影响因子：
2.9
通讯作者：
Shallcross, Dudley E.
中科院分区：
文献类型：
--
作者：
Diaz, Florencia M. R.;Khan, M. Anwar H.;Shallcross, Dudley E.
以前关于联合王国多年来臭氧表面浓度变化的工作预测，作为对环境条例的回应，臭氧事件的频率和严重性今后将变得不那么明显。本研究的目的是扩展这些研究，并将结果与他们的预测进行比较。从1992年至2019年年中，从环境，食品和农村事务部收集的英国13个农村和6个城市地点的臭氧数据被用来调查这种行为。在过去30年中，联合王国的年度臭氧浓度（臭氧浓度超过50 ppbv限值的小时数）无论地点类型如何（农村或城市）都有所下降，表明所采取的排放控制措施迄今为止在减少污染物排放方面取得了成功。在过去三十年中，无论场地类型如何，5月份的排放量最高。此外，近年来这些事件已变得不那么频繁和严重。事实上，休息的小时数比前几十年要少，而且在一周内几乎是恒定的。
Previous work regarding the behaviour of ozone surface concentrations over many years in the United Kingdom had predicted that the frequency and severity of ozone episodes would become less marked in the future as a response to environmental regulations. The aim of this study is to extend these studies and compare the results with their predictions. The ozone data of 13 rural and six urban sites in the UK collected from the Department for Environment, Food and Rural Affairs over a period from 1992 to mid-2019 were used to investigate this behaviour. The yearly ozone exceedances (the number of hours that the ozone concentration exceeded the 50 ppbv limit) in the United Kingdom were found to have decreased over the last 30 years regardless of the type of site (rural or urban), showing that the adopted emission controls have so far been successful in the abatement of pollutant emissions. In the past three decades, the highest numbers of exceedances were reached in May regardless of the type of site. Furthermore, these episodes have become less frequent and less severe in recent years. In fact, the number of hours of exceedance is lower than that in previous decades, and it is almost constant throughout the week.