2013年至2015年撒哈拉沙尘对西西里岛PM10措施影响的研究
Study of Saharan dust influence on PM10 measures in Sicily from 2013 to 2015
摘要：
现今，颗粒物质，特别是细小的颗粒物，如PM10、PM2.5和PM1，是最常与多项不良健康影响有关的空气质素指标。本文分析了撒哈拉沙漠的沙尘输送等自然事件对西西里岛颗粒物质浓度增加的影响。参考环境保护区域机构下属的空气质量监测网收集的每日PM10浓度数据，可以分析2013年至2015年的趋势。对超过限值的天数进行合并分析。它基于三个模型：使用大气模式HYSPLIT对气团后向轨迹的解释混合单粒子拉格朗日积分轨迹应用DREAM模式计算地面和高空颗粒物浓度（Dust Regional大气模式）和根据大气光学厚度（AOT）计算矿物气溶胶的浓度应用NAAPS（Navy Aerosol Analysis and Prediction System）模式，当三个模式一致时，日限值的变化完全归因于撒哈拉沙尘事件的输送。通过确定自然事件，可以量化撒哈拉沙尘的贡献，从而减少沙尘暴的数量。
英文摘要：
Nowadays, particulate matter, especially that with small dimension as PM10, PM2.5 and PM1, is the air quality indicator most commonly associated with a number of adverse health effects. In this paper it is analyzed the impact that a natural event, such as the transport of Saharan dust, can have on increasing the particulate matter concentration in Sicily.Consulting the data of daily PM10 concentration, acquired by air quality monitoring network belonging to Agenzia Regionale Protezione Ambiente (Environmental Protection Regional Agency), it was possible to analyze the trend from 2013 to 2015. The days, in which the limit value was exceeded, were subjected to combined analysis. It was based on three models: interpretations of the air masses back trajectories, using the atmospheric model HYSPLIT (HYbrid Single Particle Lagrangian Integrated trajectory); on the calculation of the concentration on the ground and at high altitude particulate applying DREAM model (Dust REgional atmospheric model) and on the calculation of the concentration of mineral aerosols according to the atmospheric optical thickness (AOT) applying NAAPS model (Navy Aerosol Analysis and Prediction System).The daily limit value exceedances were attributed to the transport of Saharan dust events exclusively when the three models were in agreement with each other. Identifying the natural events, it was possible to quantify the contribution of the Saharan dust and consequently the reduction of the exceedances number.
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