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Impact of synoptic meteorological conditions on air quality in three different case studies in Rome, Italy
Atmospheric Pollution Research ( IF 4.5 ) Pub Date : 2021-02-26 , DOI: 10.1016/j.apr.2021.02.019
Annalisa Di Bernardino , Anna Maria Iannarelli , Stefano Casadio , Cinzia Perrino , Francesca Barnaba , Luca Tofful , Monica Campanelli , Luca Di Liberto , Gabriele Mevi , Anna Maria Siani , Marco Cacciani

This study analyses the influence of synoptic weather conditions on atmospheric particulate matter concentration and composition during an intensive measurement campaign, performed in the urban area of Rome (Italy) in winter 2017. To evaluate the effect of local particulate sources, data from several urban and rural ground-based air quality stations were considered. The analysis involved the following atmospheric parameters: wind speed and direction near the ground, air temperature, specific humidity, height and evolution of the mixing layer. Furthermore, the daily variability of aerosol optical depth, tropospheric and near-surface nitrogen dioxide amounts were investigated. Results show that the natural removal of particulate matter is favoured by intense, continental winds. Contrariwise, when persistent thermal inversion occurs, pollutant dispersion is very limited and high concentrations are recorded by urban stations. Finally, in the case of Saharan dust outbreaks, an increase in the particulate content in both urban and rural stations is notable. Consequently, specific measurements aimed at improving air quality in urban environments should be planned according to synoptic weather and aerosol forecasts. This keeps valid in specific conditions of long-range transport of desert dust particles when the natural contribution could exceed that of pollutants from anthropogenic emissions.



中文翻译:

在意大利罗马的三个不同案例研究中,天气气象条件对空气质量的影响

这项研究分析了天气天气条件对2017年冬季在罗马市区(意大利)开展的一次密集测量活动中大气颗粒物浓度和组成的影响。考虑了农村地面空气质量监测站。分析涉及以下大气参数:风速和接近地面的方向,空气温度,比湿度,高度和混合层的演变。此外,研究了气溶胶光学深度,对流层和近地表二氧化氮含量的日变化。结果表明,强烈的大陆风有利于自然清除颗粒物。相反,当持续发生热反演时,污染物的扩散非常有限,城市车站记录到高浓度的污染物。最后,在撒哈拉粉尘暴发的情况下,城市和农村站点的颗粒物含量明显增加。因此,应根据天气和气溶胶预报计划具体措施,以改善城市环境中的空气质量。当自然贡献可能超过人为排放污染物的自然贡献时,这在沙漠尘埃颗粒的远距离运输的特定条件下仍然有效。应根据天气和气溶胶预报计划旨在改善城市环境中空气质量的具体测量。当自然贡献可能超过人为排放污染物的自然贡献时,这在沙漠尘埃颗粒的远距离运输的特定条件下仍然有效。应根据天气和气溶胶预报计划旨在改善城市环境中空气质量的具体测量。当自然贡献可能超过人为排放污染物的自然贡献时,这在沙漠尘埃颗粒的远距离运输的特定条件下仍然有效。

更新日期:2021-02-28
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