Ozone in Central England: the impact of 20 years of precursor emission controls in Europe
Ozone in Central England: the impact of 20 years of precursor emission controls in Europe
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DOI：
10.1016/j.envsci.2010.02.001
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发表时间：
2010-05
影响因子：
6
通讯作者：
R. Derwent;C. Witham;S. Utembe;M. E. Jenkin;N. Passant
中科院分区：
文献类型：
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作者：
R. Derwent;C. Witham;S. Utembe;M. E. Jenkin;N. Passant
1990-2007年期间，在英国中部地区的监测点，臭氧峰值水平出现了大幅下降，而同期的年平均日最高水平则有所上升。利用光化学轨迹模型进行的敏感性研究表明，欧洲控制挥发性有机化合物（VOC）和氮氧化物（NOx）排放的政策可能是导致间歇性峰值水平下降的原因。似乎有小的影响，从洲际跨大西洋运输的变化，但压倒性的影响，对年度平均每日最高水平的情景峰值。挥发性有机化合物和氮氧化物排放控制与臭氧之间的非线性关系，以及政策制定者设定的目标水平，似乎可以解释为什么尽管欧洲采取了二十年的政策行动，但英格兰中部的臭氧水平仍然不符合国际公认的空气质量准则。
Episodic peak ozone levels over the 1990–2007 period appear to have declined strongly whilst annual mean daily maximum levels have risen over the same period at monitoring sites within the midlands regions of the UK. Sensitivity studies carried out with a photochemical trajectory model have shown that European policies to control Volatile Organic Compound (VOC) and Nitrogen Oxides (NOx) emissions are the likely cause of the decline in episodic peak levels. There appeared to have been little influence on the episodic peak from changes in intercontinental trans-Atlantic transport but an overwhelming influence on the annual mean daily maximum levels. Non-linear relationships between VOC and NOxemission controls and ozone, together with the ambition level set by policy-makers, appear to explain why ozone levels in Central England still do not meet internationally accepted air quality guidelines despite two decades of policy actions within Europe.