|
| |
|
|
Comparison of Winter Biomass Burning Source Contribution at National Atmospheric Observatory Košetice Based on AMS and Aethalometer Data.
Schwarz, Jaroslav ; Vodička, Petr ; Zíková, Naděžda ; Mbengue, Saliou ; Šerfözö, Norbert ; Pokorná, Petra ; Makeš, Otakar ; Ždímal, Vladimír
Although atmospheric aerosol concentrations exhibit decreasing trend in last decades, the contribution of aerosol emitted by biomass combustion is opposite due to increasing wood combustion used for residential heating. Previous works determined that the share of aerosol of biomass burning origin was up to 50 % in winter. In this work, the data from aerosol mass spectrometer (AMS) and Positive Matrix Factorization (PMF) are used to elucidate biomass combustion aerosol impact at National Atmospheric Observatory Košetice (NAOK) and the results are compared with simple aethalometer model approach.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22019110512051 - PDF
|
|
| |
|
|
NMR Aerosolomics as a Tool to Distinguish Various Types of Aerosols.
Horník, Štěpán ; Schwarz, Jaroslav ; Ždímal, Vladimír ; Sýkora, Jan
Water-soluble organic compounds represent up to 80% of all organic compounds present in atmospheric aerosols. Unlike composition of inorganic compounds or volatile organic compounds, which seems to be well explored, the knowledge about WSOC composition is still rather limited. The most frequently used method for WSOC analysis is GC-MS, which is a very sensitive technique. However, the analysis of polar compounds via GC-MS requires derivatization and the quantification is extremely time consuming. The second widely used technique is ion chromatography (IC). Nowadays, IC is routinely used for analysis of specific groups of organic compounds such as carboxylic acids, amines or carbohydrates. On the other hand, there is NMR spectroscopy as a fully quantitative but rather insensitive method. NMR spectroscopy was for the purpose of aerosol chemistry employed only recently as this technique has undergone rapid development and sensitivity gain of late. So far, the use of NMR spectroscopy is mainly restricted to socalled Functional Group Analysis, of which main interest lies elsewhere than in identification of individual compounds.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22019110512330 - PDF
|
|
|
Study of Wet Deposition of Atmospheric Aerosol using Horizontal Hydrometeors.
Zíková, Naděžda ; Pokorná, Petra ; Pešice, Petr ; Sedlák, Pavel ; Ždímal, Vladimír
Processes between atmospheric aerosol (AA) and clouds, source of large uncertainty in weather and climate changes estimations, were described on fogs at Milešovka, meteorological observatory of the Institute of Atmospheric Physics. For the description of the AA properties, online measurement of outdoor particle number size distribution (PNSD) in the size range 10 nm – 20 μm was conducted using SMPS and APS spectrometers. The sampling system consisted of a heated whole air inlet, and PM2.5 sampling head, being switched by an automatic valve. From the difference between PNSD sampled by whole air inlet and by PM2.5 inlet, PNSD of activated particles (aPNSD) was calculated. The aPNSDs differ with hydrometeor type and depend on air mass history, with a stronger influence on freezing fog AA.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22019110512030 - PDF
|
|
|
Origin of Atmospheric Aerosol Based on Data with Different Time Resolution at the National Atmospheric Observatory Košetice.
Pokorná, Petra ; Zíková, Naděžda ; Lhotka, Radek ; Vodička, Petr ; Makeš, Otakar ; Mbengue, Saliou ; Holubová Šmejkalová, Adéla ; Schwarz, Jaroslav ; Ondráček, Jakub ; Ždímal, Vladimír
To improve the air quality the underlying causalities must be well understood,particularly when it comes to aspects such as PM concentration, sources and their origin. The aim of this work was to determine air pollution origin at NAOK based on atmospheric aerosol (AA) data of different time resolution measured during intensive summer campaing.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22019110512031 - PDF
|
|
| |
|
| |
|
|
Identification of Sources of Polycyclic Aromatic Hydrocarbons in Central Europe.
Lhotka, Radek ; Pokorná, Petra ; Zíková, Naděžda
This study evaluates the trends and sources of polycyclic aromatic hydrocarbons (PAH) monitored at National atmospheric observatory Košetice (NAOK), a rural background site. In total, 14 PAH concentrations in particulate matter (PM10) between 2006 and 2016 were evaluated. The highest concentrations of all PAH were measured at the beginning of the study period, in 2006. The positive matrix factorization (EPA PMF 5.0) was used to determine the sources of PAH at NAOK, with three factors resolved. The probable origin areas of PMF factors were identified by Conditional Bivariate Probability Function method (CBPF) and Potential Source Contribution Function method (PSCF) methods. NAOK is affected by local sources of PAH, as well as by regional and long-range transport.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22019110511050 - PDF
|
guest ::
