Air quality assessment in a heavily polluted urban Mediterranean environment through air quality indices

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• 作者：P.A. Kassomenos^a ; A. Kelessis^b ; M. Petrakakis^b ; N. Zoumakis^c ; Th. Christidis^c ; A.K. Paschalidou^a ; ^{apaschal@cc.uoi.gr} ; ^{paschal@env.duth.gr}
• 关键词：Air quality Index ; Urban air pollution assessment ; Monitoring atmospheric data ; Mediterranean city ; Complex terrain
• 刊名：Ecological Indicators
• 出版年：2012
• 期刊代码：22_1470160x
• 类别：env
• 出版时间：July, 2012
• 卷：18
• 期：Complete
• 页码：259-268
• 文件大小：746 K

摘要

During the last years several attempts were made to introduce various air quality indices, defined for a specific air pollutant or a mixture of pollutants, based on standards and guidelines proposed by international organizations. In this work, air quality data (CO, SO₂, O₃, PM₁₀ and NO₂) corresponding to the six-year period between 2004 and 2009 and collected at three monitoring stations in Thessaloniki, the second largest Greek city, were used in order to compute three different air quality indices. The first index was based on individual pollutants and was employed to characterise the air quality status for each one of the air pollutants separately, whereas the second index was based on a combination of pollutants in both the short and the long terms. The results showed that when individual pollutants were used, the air quality in the city-centre could be characterised as 鈥渂ad鈥?for 47%of the days for PM₁₀, 鈥渂ad鈥?for 89%of the days for NO₂ and 鈥渂ad to severe鈥?for 13%of the days for O₃. Similarly, the indices based on a mixture of pollutants showed that in the city centre 43%of the days are 鈥減roblematic to very poor鈥?in terms of the air quality, whereas in the suburbs 54%of the days are found in the range of 鈥済ood to very good鈥? Furthermore, the use of biometeorological air quality indices that take into account the adverse health effects of air pollution on public health showed that the overall air quality is poor in the city centre for 58%of the days studied, while at the peripheral sites and during Sundays the air quality seems to be improved significantly, with relevant percentages equal to 18%and 13%respectively. Moreover, weekly and neighbourhood patterns were detected by all groups of indices. On the whole, all of the methodologies used revealed that the air quality in Thessaloniki is poor and that PM₁₀ is the main contributor to this.