National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
TRACERS OF ANTHROPOGENIC AND BIOGENIC SOURCES OF ORGANIC AEROSOL IN THE PM1 FRACTION AT THE KOŠETICE BACKGROUND STATION
Vodička, Petr ; Kawamura, K. ; Deshmukh, D.K. ; Pokorná, Petra ; Schwarz, Jaroslav ; Ždímal, Vladimír
In this study, we have examined in detail the seasonal changes in the concentration of sugars, dicarboxylic acids and their oxidation precursors in fine aerosol at a rural Central European background site. The aim of the study was to identify typical tracers for different sources of organic aerosol and to determine their contributions to organic PM1.We found a clear difference between winter and summer PM1 aerosol composition at the molecular level. Subsequently, we identified two biogenic factors (dominant in summer), two anthropogenic factors (major contribution in winter) and one background factor.\nMore details could be found in Vodička et. al (2023).
Plný tet: Download fulltextPDF
Seasonal changes in stable carbon isotope composition (Δ13C) in aerosol and gas phase at a suburban station in Prague
Vodička, Petr ; Kawamura, K. ; Schwarz, Jaroslav ; Ždímal, Vladimír
In this work, seasonal variations in the stable carbon isotope ratio (δ13C) of total carbon (TC, δ13CTC) and water-soluble organic carbon (WSOC, δ13CWSOC) in fine aerosol\nparticles (PM2.5) as well as in the total carbon of the gas phase (TCgas, δ13CTCgas) were studied. Despite the different seasonal compositions of carbonaceous aerosols, the\nisotope differences (Δδ13C) between the analyzed bulk aerosol parts and gas phases were similar during the seasons. This shows that the fractionation of stable carbon isotopes is a predominantly physical process in which the chemical composition of individual compounds in bulk aerosols does not play a major role.
Plný tet: Download fulltextPDF
Characterization of Nitrogen Isotopic Composition in Fine Aerosol at a Central European Rural Background Station.
Vodička, Petr ; Kawamura, K. ; Schwarz, Jaroslav ; Kunwar, B. ; Ždímal, Vladimír
Studies of isotope ratios in atmospheric aerosols is relativelly new approach which can provide unique information on source emissions together with physical and chemical processes in the atmosphere (e.g. Kawamura et al., 2004). Here, we present seasonal variations in δ15N of total nitrogen (TN) in the PM1 fraction of atmospheric aerosols at a rural background site in Central Europe.\n
Fulltext: content.csg - Download fulltextPDF
Plný tet: SKMBT_C22018110212470 - Download fulltextPDF

Interested in being notified about new results for this query?
Subscribe to the RSS feed.