|
|
Ambient organic aerosol origin at rural background site in the Czech Republic
Lhotka, Radek
Atmospheric aerosols (AA) are ubiquitous particles in the atmosphere that influence the Earth’s climatic system, environmental interactions, and human health. Among AA, great interest is dedicated to organic aerosols (OA) since it can represent from 20 to 90% of total submicron mass. Source apportionment of OA at background sites is one of the important tasks of current air quality protection.
Plný tet:  PDF
|
|
| |
|
| |
|
| |
|
|
Identifying of Organic Aerosol Sources by Using of Advanced Factor Analysis
Makeš, Otakar ; Vodička, Petr ; Schwarz, Jaroslav ; Canonaco, F. ; Prevot, A.
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.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22013101814580 - PDF
|
|
| |
guest ::
