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Changes in Composition of Submicron Particular Matter of Atmospheric Aerosol During 2013 New Year´s Celebration
Kubelová, Lucie ; Vodička, Petr ; Schwarz, Jaroslav
In this work we investigated rapid changes in chemical composition of PM1 fraction during the celebrations of New Year 2013. The measurements were carried out at the urban background site Prague-Suchdol. The compact Time-of-Flight Aerosol Mass Spectrometer (c-ToF-AMS, Aerodyne), Drewnick et al. (2005), was used to analyze highly time-resolved samples of non-refractory aerosol components. We focused on four episodes with significantly elevated total aerosol mass concentration. We assume that the increased concentrations are due to: smoke plume from wood burning in Episode 1, fireworks in Episode 2, arrival of another air mass in Episode 3, and an uncategorized source of poly-aromatic hydrocarbons in Episode 4. The highest attention was given to the time interval between 00:20 and 2:20 a.m. on the New Year (marked in Figure 1 as Episode 2) as the aerosol composition was significantly affected by the occurring annual celebrations. In this period, the most significant increase in mass concentration was observed by sulfate, chlorides, and potassium (involved in the mass spectra for fragment 39). At the same time, nitrate and ammonium were unaffected. Those trends were compared to other measurements with c-ToF-AMS during annual celebrations, Drewnick et al.
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Plný tet: SKMBT_C22013101814584 - PDF
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Generation of Pb/PbOx Nanoparticles for Inhalation Experiments
Moravec, Pavel ; Smolík, Jiří ; Ondráček, Jakub ; Vodička, Petr ; Fajgar, Radek
Health aspects of nanoparticles (NP′s) on living beings are considered to be important. However, the real data of the impact of NP′s inhalation are rather rare. A study of allocation of MnOx nanoparticles in organs of laboratory animals in inhalation chamber was presented by Večeřa and Mikuška (2012). For these experiments a source of continual generation of nanoparticles in duration of days or even weeks and in appropriate concentration is necessary. In this work a study of continual generation of Pb/PbOx nanoparticles in hot wall tube reactor are presented.
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Plný tet: SKMBT_C22013091912130 - PDF
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Ultrafine Particle Concentrations: Importance of Local Sources and New Particle Formation in Two Central European Cities
Wonaschuetz, A. ; Wagner, R. ; Aschauer, I. ; Haindl, R. ; Ludwig, W. ; Zecha, G. ; Ondráček, Jakub ; Vodička, Petr ; Zíková, Naděžda ; Ždímal, Vladimír ; Schwarz, Jaroslav ; Hitzenberger, R.
In this study, the importance of local primary sources and new particle formation as sources of fine and ultrafine particles is investigated for winter and summer in two central European cities. Particular attention is given to the impact of local meteorological characteristics: air mass origins play a large role in the characteristics of the background aerosol and the concentrations of trace gases associated with new particle formation and growth, and precipitation and thus the condensational sink.
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Plný tet: SKMBT_C22013091713550 - PDF
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Comparability of Methods to Measure Black and Elemental Carbon in Two European Urban Areas - Site and Seasonal Similarities and Differences
Hitzenberger, R. ; Schwarz, Jaroslav ; Aschauer, I. ; Haindl, R. ; Ludwig, W. ; Wagner, R. ; Wonaschuetz, A. ; Zecha, G. ; Ševčíková, Irena ; Vodička, Petr ; Zíková, Naděžda ; Ždímal, Vladimír
The goal of the current study is to investigate whether similar conversion factors are applicable at the sites and whether the conversion factors obtained earlier (i.e. ca. 10 years ago) for Vienna are still valid or whether changing source conditions have resulted in shifts of the carbonaceous fractions of the aerosol that would require a new set of conversion factors.
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Plný tet: SKMBT_C22013091712210 - PDF
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Comparison of Mass Size Distribution of PM and Ions in Prague and Vienna in Winter and Summer
Schwarz, Jaroslav ; Zíková, Naděžda ; Vodička, Petr ; Ševčíková, Irena ; Kugler, Josef ; Wonaschuetz, A. ; Aschauer, I. ; Ludwig, W. ; Haindl, R. ; Zecha, G. ; Hitzenberger, R. ; Ždímal, Vladimír
The results we obtained on mass size distributions of mass and water soluble ions exhibit common basic features of ambient aerosols in Central Europe. E.g., mass size distributions in winter were dominated by a fine mode. Sulfates and ammonium were almost exclusively present in the fine mode, fine nitrates were mostly low in summer due to high summer temperatures, but they had always a distinct coarse mode. Normal size distributions of ammonium and sulfates were often almost identical in summer due to low nitrates.
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Plný tet: SKMBT_C22013091714380 - PDF
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Study of Organic Carbon with Different Volatility
Vodička, Petr ; Schwarz, Jaroslav
This work characterizes diurnal trends of OC fractions at Prague suburban site during different seasons over the whole year. Moreover, owing to the parallel measurements at suburban site together with Czech background station Košetice during heating and non-heating season we found which OC fractions are typical for urban and rural environments and their diurnal trends.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22012102615342 - PDF
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