Repozitorij Univerze v Novi Gorici

Izpis gradiva
A+ | A- | Pomoč | SLO | ENG

Naslov:Development and evaluation of an improved offline aerosol mass spectrometry technique
Avtorji:ID Vasilakopoulou, Christina (Avtor)
ID Florou, Kalliopi (Avtor)
ID Kaltsonoudis, Christos (Avtor)
ID Stavroulas, Iasonas (Avtor)
ID Mihalopoulos, Nikolaos (Avtor)
ID Pandis, Spyros N. (Avtor)
Datoteke:URL https://amt.copernicus.org/articles/16/2837/2023/
 
URL https://amt.copernicus.org/articles/16/2837/2023/amt-16-2837-2023.pdf
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Abstract. The offline aerosol mass spectrometry technique is a useful tool for the source apportionment of organic aerosol (OA) in areas and periods during which an aerosol mass spectrometer (AMS) is not available. However, the technique is based on the extraction of aerosol samples in water, while several atmospheric OA components are partially or fully insoluble in water. In this work an improved offline technique was developed and evaluated in an effort to capture most of the partially soluble and insoluble organic aerosol material, reducing significantly the uncertainty of the corresponding source apportionment. A major advantage of the proposed approach is that no corrections are needed for the offline analysis to account for the limited water solubility of some OA components. The improved offline AMS analysis was tested in three campaigns: two during winter and one during summer. Collocated online AMS measurements were performed for the evaluation of the offline method. Source apportionment analysis was performed separately for the online and the offline measurements using positive matrix factorization (PMF). The PMF results showed that the fractional contribution of each factor to the total OA differed between the online and the offline PMF results by less than 15 %. The differences in the AMS spectra of the factors of the two approaches could be significant, suggesting that the use of factor profiles from the literature in the offline analysis may lead to complications. Part of the good agreement between the online and the offline PMF results is due to the ability of the improved offline AMS technique to capture a bigger part of the OA, including insoluble organic material. This was evident by the significant fraction of submicrometer suspended insoluble particles present in the water extract and by the reduced insoluble material on the filters after the extraction process. More than half of the elemental carbon (EC) was on average missing from the filters after the water extraction. Significant EC concentrations were measured in the produced aerosol that was used as input to the AMS during the offline analysis.
Ključne besede:organic aerosol, receptor modeling, offline PMF, Greece
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:01.01.2023
Leto izida:2023
Št. strani:str. 2837-2850
Številčenje:Vol. 16, issue 11
PID:20.500.12556/RUNG-9030 Novo okno
COBISS.SI-ID:195033859 Novo okno
UDK:53
ISSN pri članku:1867-8548
eISSN:1867-8548
DOI:10.5194/amt-16-2837-2023 Novo okno
NUK URN:URN:SI:UNG:REP:19VC2MH4
Datum objave v RUNG:10.05.2024
Število ogledov:927
Število prenosov:5
Metapodatki:XML DC-XML DC-RDF
:
Kopiraj citat
  
Skupna ocena:(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.
Objavi na:Bookmark and Share


Postavite miškin kazalec na naslov za izpis povzetka. Klik na naslov izpiše podrobnosti ali sproži prenos.

Gradivo je del revije

Naslov:Atmospheric measurement techniques
Skrajšan naslov:Atmos. meas. tech.
Založnik:Copernicus Publications
ISSN:1867-8548
COBISS.SI-ID:522351897 Novo okno

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:07.06.2023

Nazaj