PM1 variability and transport conditions between an urban coastal area and a high mountain site during the cold season
PM1 variability and transport conditions between an urban coastal area and a high mountain site during the cold season
复制标题
DOI：
10.1016/j.atmosenv.2015.07.042
复制
发表时间：
2015-10
影响因子：
5
通讯作者：
J. Nicolás;N. Galindo;E. Yubero;J. Crespo;Rubén Soler
中科院分区：
文献类型：
--
作者：
J. Nicolás;N. Galindo;E. Yubero;J. Crespo;Rubén Soler
在深秋和冬季，西地中海盆地经常受到由停滞天气条件引起的严重污染事件（SPE）的影响，这些天气条件会导致颗粒物（PM）水平显著增加。本研究的主要目的是评估这些事件对地中海西部一个城市和一个高山站点pm1浓度变异性的影响。在城市站点，由于晚高峰混合层深度的减少，SPEs在20:00-21:00 UTC导致pm1水平增加20 μg m−3。相比之下，高山站的最大增量（~ 12 μg m−3）在中午左右观察到。由于山区站周围几乎没有人为排放，这很可能是沿海城市地区气溶胶运输和运输过程中二次粒子光化学形成的结果。空气污染物在特定的天气条件下通过复杂的地形进行输送。
During late autumn and winter, the western Mediterranean basin is often affected by severe pollution episodes (SPE) caused by stagnant weather conditions that produce a notable increase in particulate matter (PM) levels. The main objective of the present study is to evaluate the impact of these episodes on the variability of PM1concentrations at an urban and a high mountain station in the western Mediterranean. At the urban site, SPEs caused increases in PM1levels of up to 20 μg m−3at 20:00–21:00 UTC due to a decrease in the mixing layer depth during the evening rush hour. In contrast, the highest increments at the high mountain station (∼12 μg m−3) were observed around midday. Since there are little anthropogenic emissions in the surroundings of the mountain station, this was most likely the result of aerosol transport from coastal urban areas and photochemical formation of secondary particles during transport. The transport of air pollutants through a complex orography occurs under specific weather conditions.