The effect of different transport modes on urban PM10 levels in two European cities

L. Makra, Ioana Ionel, Zoltán Csépe, István Matyasovszky, Nicolae Lontis, Francisc Popescu, Zoltán Sümeghy

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

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 500m 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.

Original languageEnglish
Pages (from-to)36-46
Number of pages11
JournalScience of the Total Environment
Volume458-460
DOIs
Publication statusPublished - Aug 1 2013

Fingerprint

Trajectories
Dust
trajectory
long range transport
dust
Clustering algorithms
air mass
Air
Europe
effect
city
Eastern Europe

Keywords

  • Backward trajectories
  • Cluster analysis
  • Mahalanobis metric
  • PM transport
  • Separation of medium- and long-range PM transport

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Waste Management and Disposal
  • Environmental Engineering

Cite this

The effect of different transport modes on urban PM10 levels in two European cities. / Makra, L.; Ionel, Ioana; Csépe, Zoltán; Matyasovszky, István; Lontis, Nicolae; Popescu, Francisc; Sümeghy, Zoltán.

In: Science of the Total Environment, Vol. 458-460, 01.08.2013, p. 36-46.

Research output: Contribution to journalArticle

Makra, L. ; Ionel, Ioana ; Csépe, Zoltán ; Matyasovszky, István ; Lontis, Nicolae ; Popescu, Francisc ; Sümeghy, Zoltán. / The effect of different transport modes on urban PM10 levels in two European cities. In: Science of the Total Environment. 2013 ; Vol. 458-460. pp. 36-46.
@article{c6f1d18fa16541b09cb5431964a9ed16,
title = "The effect of different transport modes on urban PM10 levels in two European cities",
abstract = "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 500m 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.",
keywords = "Backward trajectories, Cluster analysis, Mahalanobis metric, PM transport, Separation of medium- and long-range PM transport",
author = "L. Makra and Ioana Ionel and Zolt{\'a}n Cs{\'e}pe and Istv{\'a}n Matyasovszky and Nicolae Lontis and Francisc Popescu and Zolt{\'a}n S{\"u}meghy",
year = "2013",
month = "8",
day = "1",
doi = "10.1016/j.scitotenv.2013.04.021",
language = "English",
volume = "458-460",
pages = "36--46",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier",

}

TY - JOUR

T1 - The effect of different transport modes on urban PM10 levels in two European cities

AU - Makra, L.

AU - Ionel, Ioana

AU - Csépe, Zoltán

AU - Matyasovszky, István

AU - Lontis, Nicolae

AU - Popescu, Francisc

AU - Sümeghy, Zoltán

PY - 2013/8/1

Y1 - 2013/8/1

N2 - 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 500m 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.

AB - 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 500m 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.

KW - Backward trajectories

KW - Cluster analysis

KW - Mahalanobis metric

KW - PM transport

KW - Separation of medium- and long-range PM transport

UR - http://www.scopus.com/inward/record.url?scp=84877144696&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84877144696&partnerID=8YFLogxK

U2 - 10.1016/j.scitotenv.2013.04.021

DO - 10.1016/j.scitotenv.2013.04.021

M3 - Article

VL - 458-460

SP - 36

EP - 46

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

ER -