Atmospheric aerosol in high time resolution

V průběhu posledních dekád se ukazuje, že velikostní a chemické složení atmosférického aerosolu (AA) má zásadní vliv jak na lidské zdraví, tak na řadu procesů probíhajících v atmosféře. Ačkoliv stále roste snaha o popis chování AA, mnoha jevům stále nerozumíme dostatečně, abychom byli schopni chování aerosolů a jevy s nimi spojené v uspokojivé míře předpovídat. Tato dizertační práce popisuje chování aerosolu ve vysokém časovém rozlišení v rámci tří hlavních témat. Prvním tématem je popis chemického a velikostního složení frakce non-refractory PM1 (NR- PM1) na příměstské stanici Praha - Suchdol a studium vlivu meteorologických jevů na chování tohoto aerosolu. Kvůli identifikaci sezónních vlivů probíhala měření v letním i zimním období. V souvislosti s popisem aerosolu na stanici byla provedena Positive Matrix Factorization (PMF) analýza, která identifikovala chemicky rozlišené hmotnostní profily zdrojů aerosolu a jejich časový průběh. Druhým tématem je pronikání aerosolových částic z venkovního do vnitřního prostředí. Souběžným měřením vně a uvnitř budovy byl prozkoumán vliv velikostního a chemického složení částic na jejich penetraci z venkovního do vnitřního prostředí. Také byl zkoumán vliv meteorologických podmínek a sezónnosti na míru penetrace. Během tohoto experimentu byl identifikován zdroj...Over the last decades, it has become clear that the size and chemical composition of atmospheric aerosol (AA) has a major impact on both human health and a number of processes in the atmosphere. Although there are increasing efforts to describe the behavior of AA, many phenomena are still not sufficiently understood to be able to predict aerosol behavior and associated phenomena to a satisfactory degree. This PhD thesis describes aerosol behavior at high temporal resolution within three main topics. The first topic is the description of the chemical and size composition of the non-refractory PM1 (NR-PM1) fraction at the Prague - Suchdol suburban station and the study of the influence of meteorological phenomena on the behavior of this aerosol. In order to identify seasonal effects, measurements were carried out in summer and winter. Positive Matrix Factorization (PMF) analysis was performed in connection with the aerosol description at the station, which identified chemically resolved mass profiles of aerosol sources and their temporal evolution. The second topic is the penetration of aerosol particles from the outdoor to the indoor environment. The influence of particle size and chemical composition on the penetration of particles from the outdoor to the indoor environment was investigated by...Institute for Environmental StudiesÚstav pro životní prostředíFaculty of SciencePřírodovědecká fakult

Identifying of Organic Aerosol Sources by Using of Advanced Factor Analysis

Real-time measurement of submicron aerosol was performed at Prague – Suchdol site (Czech Republic) during six weeks in June and July 2012. Organic aerosol data obtained from measurement by C-ToF AMS were deconvoluted using the Multilinear Engine (ME-2) algorithm (Paatero, 1999) and analyzed with the newly developed GUI provided by Paul Scherrer Institute (Canonaco et al. in prep.). During the analysis, we obtained four factor solution which explains more than 95% of the variance. These four factors, related to four aerosol sources, were fixed by the ME-2 model: Hydrocarbon-like organic aerosol (HOA) factor related to the road traffic, biomass burning organic aerosol (BBOA) factor, and two kinds of oxygenated organic aerosol factors (LV-OOA and SV-OOA). LV-OOA factor is the most frequently interpreted as an aged aerosol with low volatility. On the contrary, diurnal patterns of SV-OOA factor exhibit maxima at night and high anti-correlation with temperature. Therefore it can be assumed that SV-OOA factor represents a volatile fraction of OOA

Characteristics Comparison of Organic Aerosols in Winter and Summer Season in Prague

This study provides aerosol characteristics of two campaigns. The first one took places in July 2010 at Prague suburban site Suchdol and the second one took place in December 2010 at the same place. The objective of this study is to compare the results and find out differents between summer and winter aerosols

Characterization of Submicron Organic Aerosol in Prague by ME 2 Factor Analysis of Summer AMS Data

Real-time measurement of submicron aerosol was performed at Prague – Suchdol site (Czech Republic) during six weeks in June and July 2012. Highly time-and-size resolved data were obtained from measurements carried out by a Compact Time-of-Flight Aerosol Mass Spectrometer (C-ToF-AMS, Aerodyne). The retrieved organic data were deconvoluted using the Multilinear Engine (ME-2) algorithm (Paatero, 1999), and analyzed with the newly developed GUI provided by Paul Scherrer Institute (Canonaco et al. in prep.). The preliminary results are presented in this abstract

Comparison of Source Apportionment Results from Summer and Winter Measuring Campaign at a Prague-Suchdol Site

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

Characterization of Submicron Aerosol in Prague by Source Apportionment Analysis of Combined AMS Data.

PM1 non-refractory chemical composition and concentration was measured by Aerodyne Compact Time-of-Flight Aerosol Mass Spectrometer (AMS) during two six weeks long summer and winter campaigns in 2012-2013. The retrieved highly time resolved data were analyzed using the SoFi graphical user interface that is developed by Paul Scherrer Institute (Canonaco et al., 2013) and is running under IGOR software (WaveMetrics)

Characterization of Submicron Aerosol in Prague by Combined ME-2 Factor Analysis of AMS Data

Real-time measurement of submicron aerosol particles was performed at Prague – Suchdol site (Czech Republic) during six weeks long summer and winter campaigns in 2012-2013. Highly time and size resolved data were obtained from measurements carried out by a Compact Time-of-Flight Aerosol Mass Spectrometer (C-ToF-AMS, Aerodyne). The retrieved data were analyzed with using the So-Fi graphical user interface which is developed by Paul Scherrer Institute (Canonaco, 2013) and is running under IGOR software (WaveMetrics). The preliminary results are presented in this abstract

Atmospheric aerosol in high time resolution

Over the last decades, it has become clear that the size and chemical composition of atmospheric aerosol (AA) has a major impact on both human health and a number of processes in the atmosphere. Although there are increasing efforts to describe the behavior of AA, many phenomena are still not sufficiently understood to be able to predict aerosol behavior and associated phenomena to a satisfactory degree. This PhD thesis describes aerosol behavior at high temporal resolution within three main topics. The first topic is the description of the chemical and size composition of the non-refractory PM1 (NR-PM1) fraction at the Prague - Suchdol suburban station and the study of the influence of meteorological phenomena on the behavior of this aerosol. In order to identify seasonal effects, measurements were carried out in summer and winter. Positive Matrix Factorization (PMF) analysis was performed in connection with the aerosol description at the station, which identified chemically resolved mass profiles of aerosol sources and their temporal evolution. The second topic is the penetration of aerosol particles from the outdoor to the indoor environment. The influence of particle size and chemical composition on the penetration of particles from the outdoor to the indoor environment was investigated by..