کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4428604 1619800 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of different transport modes on urban PM10 levels in two European cities
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
The effect of different transport modes on urban PM10 levels in two European cities
چکیده انگلیسی


• The 3D delimination of the clusters by the function “convhull” is a novel approach.
• For Bucharest, the most relevant source areas of PM10 transport are Central Europe with the Western Mediterranean.
• For Szeged, Southern and Central Europe are the most important sources of long-range transport of PM10.
• Occasional North-African-origin dust over Romania and Hungary is also detected, respectively.
• A statistical procedure is developed in order to separate medium- and long-range PM10 transport for both cities.

The aim of the study is to identify transport patterns that may have an important influence on PM10 levels in two European cities, namely Szeged in East-Central Europe and Bucharest in Eastern Europe. 4-Day, 6-hourly three-dimensional (3D) backward trajectories arriving at these locations at 1200 GMT are computed using the HYSPLIT model over a 5-year period from 2004 to 2008. A k-means clustering algorithm using the Mahalanobis metric is applied in order to develop trajectory types. Two statistical indices are used to evaluate and compare exceedances of critical daily PM10 levels corresponding to the trajectory clusters. For Bucharest, the major PM10 transport can be clearly associated with air masses arriving from Central and Southern Europe, as well as the Western Mediterranean. Occasional North African dust intrusions over Romania are also found. For Szeged, Southern Europe with North Africa, Central Europe and Eastern Europe with regions over the West Siberian Plain are the most important sources of PM10. The occasional appearance of North-African-origin dust over Hungary is also detected. A statistical procedure is developed in order to separate medium- and long-range PM10 transport for both cities. Considering the 500 m arrival height, long-range transport plays a higher role in the measured PM10 concentration both for non-rainy and rainy days for Bucharest and Szeged, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 458–460, 1 August 2013, Pages 36–46
نویسندگان
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