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Search for Links between Organic Aerosols Measured by Aerosol Mass Spectrometer and EC/OC Analyzer
Vodička, Petr ; Kubelová, Lucie ; Makeš, Otakar ; Schwarz, Jaroslav
Carbonaceous aerosols form a major part of particulate matter suspended in the atmosphere. The organic part of aerosol represents a diverse group of substances that can be analyzed in different ways. In this work, the possible linkages between organic fractions measured by Compact Time-of-Flight Aerosol Mass Spectrometer (AMS; from Aerodyne) and a semi-online EC/OC analyzer (from Sunset Laboratories) were search. Each of these instruments provides a different kind of information. Organic fractions from EC/OC analyzer provide knowledges about a diferent volatility of organic carbon (OC) while AMS provide informations about a chemical composition of characteristic mass fragments. Thus, the main objective of this work was to determine whether the organic fractions from EC/OC analyzer can indirectly provide also information on the chemical composition or somehow more characterize type of aerosol.
Plný tet: SKMBT_C22014102013551 -  PDF
Plný text: content.csg - PDF
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Comparison of Source Apportionment Results from Summer and Winter Measuring Campaign at a Prague-Suchdol Site
Makeš, Otakar ; Vodička, Petr ; Schwarz, Jaroslav
Organic aerosol (OA) is the most abundant but still poorly characterized component of airborne particulate matter. This situation is even more complicated in large cities where many anthropogenic sources of primary organic aerosol (POA) are situated. In recent years, aerosol mass spectrometry has been increasingly applied to obtain highly time-resolved chemical composition of ambient aerosol. This is considerably important for clarification of organic aerosol life cycles and sources. Two measuring campaigns, which lasted about six weeks in summer 2012 and in winter 2013, were performed at suburban site Prague – Suchdol. Aerosol data were measured by Aerodyne compact time-of-flight aerosol mass spectrometer (AMS) which is able to characterize the size resolved chemical composition of non-refractory submicron (PM1) fraction.
Plný tet: SKMBT_C22014102013550 - PDF
Plný text: content.csg - PDF
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Rozpoznávání zdrojů organického aerosolu pomocí rozšířené faktorové analýzy
Makeš, Otakar ; Vodička, Petr ; Schwarz, Jaroslav ; Canonaco, F. ; Prevot, A.
Měření submikronového aerosolu v reálném čase bylo provedeno na stanici Praha-Suchdol během šesti týdnů v červnu a červenci 2012. Data získaná měřením pomocí C-ToF AMS (aerosolový hmotnostní spektrometr) byla upravena pomocí algoritmu ME-2 (Multilinear Engine) (Paatero, 1999) a analyzována nově vyvíjeným programem poskytnutým Paul Scherrer Institutem (Švýcarsko) (Canonaco et al. in prep.). Během analýzy jsme získali čtyři faktorová řešení, která vysvětlují více než 95% variací. Tyto čtyři faktory, vztažené ke čtyřem aerosolovým zdrojům, byly ME-2 modelem interpretovány následovně: Faktor primárních uhlovodíkových aerosolů (HOA, z Hydrocarbon-like Organic Aerosol) vztahující se k dopravě, faktor organických aerosolů ze spalování biomasy (BBOA, z Biomass Burning Organic Aerosol), a dva druhy oxydovaných organických aerosolů (LV-OOA (z Low Volatile-Oxygenated Organic Aerosol) a SV-OOA (Semi Volatile-Oxygenated Organic Aerosol)). LV-OOA faktor je nejčastěji interpretován jako starý aerosol s nízkou těkavostí. Naopak, denní trend SV-OOA faktoru vykazuje maxima v noci a vysokou anti-korelaci s teplotou z čehož může být odvozeno, že SV-OOA faktor reprezentuje těkavou frakci OOA.
Plný tet: SKMBT_C22013101814580 - PDF
Plný text: content.csg - PDF
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Characterization of Fine Particles by Aerosol Mass Spectrometer at the Prague Suburban Site During Summer and Winter Season
Vodička, Petr ; Makeš, Otakar ; Schwarz, Jaroslav
The increasing interest in the role of aerosols in the atmosphere leads to a growing need to their measurements in the environment. For this reasons, the detailed studies of aerosols were also included into the existing European project ACTRIS (www.actris.net). One of the ACTRIS part is the coordinated long-term measurement of aerosol chemistry both with Aerosol Chemical Speciation Monitors (ACSM) (Ng et al., 2011) and by other types of Aerosol Mass Spectrometers (AMS) (Canagaratna et al., 2007). The measurement network includes many background stations (including urban background sites) all over Europe (http://www.psi.ch/acsm-stations/acsm-and-emep-stations). One of the participating stations was also an urban background site in Prague. This paper presents preliminary results characterizing the fine aerosol at this site during two intensive (summer and winter) measurement campaigns.
Plný tet: SKMBT_C22013101814591 - PDF
Plný text: content.csg - PDF
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