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HIGHLY-TIME RESOLVED ELEMENTAL SOURCE APPORTIONMENT OF PM2.5 AT AN URBAN TRAFFIC SITE IN PRAGUE
Windell, Laurence Christian ; Pokorná, Petra ; Ondráček, Jakub ; Schwarz, Jaroslav ; Lhotka, Radek ; Vodička, Petr ; Zíková, Naděžda ; Hopke, P.K. ; Ždímal, Vladimír
This work aims to quantify metal emissions from traffic at an urban traffic site in Prague, Czech Republic, identify key tracers of emissions, and investigate exhaust and non-exhaust emissions observable in fine particulate matter (PM2.5). This project signifies the first high-time resolution elemental analysis of Prague aerosols.
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Source Apportionment of Atmospheric Aersol Using by Highly Time Resolved Characterization.
Pokorná, Petra ; Hovorka, J. ; Klán, M. ; Křůmal, Kamil ; Mikuška, Pavel ; Hopke, P.K. ; Ždímal, Vladimír
The effective air quality management in the heavy polluted areas has to be based on high-quality monitoring with properly designed monitoring network and targeted measurements, which provided information required to source apportionment. The study aim was to apportion sources of atmospheric aerosol based on highly time resolved data of mass concentration of size segregated aerosol, its spatial variability, elemental composition and OC/EC at three localities in the Czech Republic in the years 2008 – 2010, 2012, 2013. According to the size fractions ratio arose the importance of PM1 source apportionment because of PM0.15-1.15 mean ratio to PM10, which comprised 85 % at the monitoring localities primarily in winter. The main sources of coarse fraction in winter were coal and biomass combustion in Březno by Chomutuv a Mladá Boleslav and road dust re-suspension in Ostrava-Ravanice and Bartovice. In summer dominated soil re-suspension and primary biological – bioaerosol in Březno by Chomutuv. The dominated source of fine fraction was in winter coal combustion Ostrava-Ravanice and Bartovice and biomass burning in Mladá Boleslav. From the above mentioned results arose, that the highly time resolved data are suitable for source identification of size segregated atmospheric aerosol and enable to evaluate representativeness of monitoring station location and measurement campaign.
Fulltext: content.csg - PDF
Plný tet: SKMBT_22317041913030 - PDF
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A 19m Deep Well – a Downward Thermal Diffusion Cloud Chamber?
Holub, R.F. ; Hopke, P.K. ; Hovorka, J. ; Otahal, P. ; Ždímal, Vladimír
An unusual phenomenon, first observed on a clear summer day after several rainy days, were droplets constantly hitting the water surface in a 19 m deep and 2.4 m diameter water well. This droplet formation was occurring during the night as well. Since the droplet formation was near continuous, we called it “the eternal rain”. The water well is about 230 years old and located in the Benedictine monastery in Broumov, Czech Republic.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22013091713150 - PDF
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