Analysis of long-range transport influences on urban PM10 using two-stage atmospheric trajectory clusters

Borge, Rafael; Lumbreras, Julio; Vardoulakis, Sotiris; Kassomenos, Pavlos; Rodríguez, Encarnación

doi:10.1016/j.atmosenv.2007.01.053

Cited by 157 publications

(84 citation statements)

References 26 publications

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“…Similar or higher values were reported for Athens: 21 μg/m 3 , for a suburban sampling point (Vassilakos et al, 2005), 23.5 and 29.4 μg/m 3 for downtown sampling points (Theodosi et al, 2011), 40.5 μg/m 3 32 μg/m 3 for high traffic downtown sampling points at ground level and 25 m above ground level respectively (Karageorgos and Rapsomanikis, 2007 Table 1 are summed, sulfates represent 35% of the mean total mass of the determined species and OC + EC represent 30%. These results are in agreement with other studies on PM 2.5 composition in Athens and other urban areas in the world (Borge et al, 2007;Karageorgos and Rapsomanikis, 2007;Theodosi et al, 2011). For elemental and organic carbon, recent results from PM 10 monitoring at a down town urban site in Athens reported average concentrations of 2200 and 6800 ng/m 3 respectively (Grivas et al, 2012), and similar values are reported by Terzi et al (2010) for Thessaloniki.…”

Section: Air Mass Trajectories and Local Meteorological Datasupporting

confidence: 82%

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Composition and Mass Closure of PM2.5 in Urban Environment (Athens, Greece)

Remoundaki

Kassomenos

Mantas

et al. 2013

Aerosol Air Qual. Res.

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Section: Air Mass Trajectories and Local Meteorological Datasupporting

confidence: 82%

“…This northern contribution reaches almost 85% during summer. On the other hand, Saharan dust transport events are very frequent in the area during spring and autumn contributing up to 25% of the prevailing air masses (Borge et al, 2007;Mihalopoulos et al, 2007;Kassomenos et al, 2010;Markou and Kassomenos, 2010;Gerasopoulos et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Composition and Mass Closure of PM2.5 in Urban Environment (Athens, Greece)

Remoundaki

Kassomenos

Mantas

et al. 2013

Aerosol Air Qual. Res.

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“…With powerful computational capabilities, the HYS-PLIT_4 model is a widely used system for calculating simple trajectories to complex dispersion and deposition simulations using either puff or particle approach (readers are re- ferred to Draxler and Hess (1997) for details of the model). Borge et al (2007) used back trajectories computed with HYSPLIT model to examine the impact of long-range atmospheric transport on urban PM 10 for three cities. Chen et al (2013) incorporated eight size fractions (<0.33, 0.66, 1.3, 2.5, 5, 14, 17 and >17 µm) of PM of metals to the HYSPLIT model and provided a prediction of the size distribution and concentrations of heavy metals.…”

Section: Hybrid Single-particle Lagrangian Integrated Trajectory (Hysmentioning

confidence: 99%

Impact of atmospheric circulations on aerosol distributions in autumn over eastern China: observational evidence

Zheng

Yang

et al. 2015

Atmos. Chem. Phys.

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Abstract. Regional heavy pollution events in eastern China (110-122 • E, 28-40 • N) are causing serious environmental problems. In this study, the relationship between the degree of regional pollution and the patterns of large-scale atmospheric circulation over eastern China in October is investigated using 10-year (2001-2010) Terra/MODIS aerosol optical depth and NCEP reanalysis data by both case study and composite analysis. Eighteen polluted and 10 clean episodes are selected and categorised into six polluted types and three clean types respectively. Generally speaking, weather patterns such as a uniform surface pressure field in eastern China or a steady straight westerly in the middle troposphere, particularly when being at the rear of the anticyclone at 850 hPa, are typically responsible for heavy pollution events. Meanwhile, clean episodes occur when strong southeastward cold air advection prevails below the middle troposphere or air masses are transported from sea to land. Uniform descending motion prevails over the study region, trapping pollutants in the lower atmosphere. Therefore, the value of vertical velocity averaged from 1000 to 100 hPa and divergence of wind field in the lower troposphere are used in this study to quantify the diffusion conditions in each circulation type. The results reveal that it is often a clean episode when both the mean downward motion (larger than 2.56 × 10 −2 Pa s −1 ) and the divergence of lowlevel winds (larger than 1.79 × 10 −2 s −1 ) are strong. Otherwise, it is more likely to be a polluted episode.

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“…The limit values for PM 10 set by the European Union in order to protect human health are 40 μg/m 3 for the annual averaged concentrations and 50 μg/m 3 for the 24 hour averaged concentrations, a value which must not be exceeded more than 35 times in a calendar year (EU, 1999(EU, , 2008. Additionally, previous studies of PM 10 concentrations in Athens have shown that some of the high PM concentration events occurring can be attributed to long range transported aerosols such as desert dust events (Grivas et al, 2004;Borge et al, 2007). In this study the concentrations of PM 10 during the period 2001-2010 at the AMAmonitoring network are analyzed with the objective to identify high PM 10 events, exceeding the PM 10 daily limit values, caused by natural particulate inputs produced by Sahara air mass intrusions.…”

Section: Introductionmentioning

confidence: 99%

Identification of the Influence of African Dust on PM10 Concentrations at the Athens Air Quality Monitoring Network during the Period 2001-2010

Aleksandropoulou

Lazaridis

2013

Aerosol Air Qual. Res.

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The objective of this work was to identify Sahara dust intrusions and quantify their contribution to annual and daily PM 10 concentrations over the Athens Metropolitan Area (AMA) during the period 2001-2010. Additionally, extreme PM 10 values attributed to large forest fires and volcanic emissions or the synergy of the above with African dust intrusions have been identified. It was found that the concentrations of PM 10 during the period studied exceeded the European Union's Air Quality Standard (EU AQS) value at most of the traffic urban (TU) stations. Most of the extreme values were attributed to dust events or large forest fires. The contribution from African dust to PM 10 concentrations on days with events and exceedances of the EU AQS was approximately 50% at TU stations and 72% at the background suburban stations (BS). Most of the African dust events contributed about 5 μg/m 3 to 34 μg/m 3 to the daily PM 10 concentrations, whereas the average contribution to annual PM 10 concentrations was approximately 8.6 ± 1.8 μg/m 3 i.e., 22.2 ± 7.5%. During the decade, no clear interannual relationship was observed between the African dust contribution and the frequency and intensity of events. The more frequent and severe episodes occurred during spring, while less frequent and less severe episodes occurred during summer. After the extraction of the African dust load the annual and daily AQS was exceeded in 2010 at only one TU station. The average annual contribution of African dust to the exceedances was approximately 36% at TU stations and 58% at BS stations.

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Analysis of long-range transport influences on urban PM10 using two-stage atmospheric trajectory clusters

Cited by 157 publications

References 26 publications

Composition and Mass Closure of PM2.5 in Urban Environment (Athens, Greece)

Composition and Mass Closure of PM2.5 in Urban Environment (Athens, Greece)

Impact of atmospheric circulations on aerosol distributions in autumn over eastern China: observational evidence

Identification of the Influence of African Dust on PM10 Concentrations at the Athens Air Quality Monitoring Network during the Period 2001-2010

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