Repository of University of Nova Gorica

Show document
A+ | A- | Help | SLO | ENG

Title:Long-term brown carbon spectral characteristics in a Mediterranean city (Athens)
Authors:ID Liakakou, Eleni (Author)
ID Kaskaoutis, Dimitris G. (Author)
ID Grivas, Georgios (Author)
ID Stavroulas, Iasonas (Author)
ID Tsagkaraki, M. (Author)
ID Paraskevopoulou, D. (Author)
ID Bougiatioti, Aikaterini (Author)
ID Dumka, Umesh Chandra (Author)
ID Gerasopoulos, Evangelos (Author)
ID Mihalopoulos, Nikolaos (Author)
Files:URL https://www.sciencedirect.com/science/article/pii/S0048969719350119?via%3Dihub
 
Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:This study analyses 4-years of continuous 7-λ Aethalometer (AE-33) measurements in an urban-background environment of Athens, to resolve the spectral absorption coefficients (babs) for black carbon (BC) and brown carbon (BrC). An important BrC contribution (23.7 ± 11.6%) to the total babs at 370 nm is estimated for the period May 2015–April 2019, characterized by a remarkable seasonality with winter maximum (33.5 ± 13.6%) and summer minimum (18.5 ± 8.1%), while at longer wavelengths the BrC contribution is significantly reduced (6.8 ± 3.6% at 660 nm). The wavelength dependence of the total babs gives an annual-mean AAE370-880 of 1.31, with higher values in winter night-time. The BrC absorption and its contribution to babs presents a large increase reaching up to 39.1 ± 13.6% during winter nights (370 nm), suggesting residential wood burning (RWB) emissions as a dominant source for BrC. This is supported by strong correlations of the BrC absorption with OC, EC, the fragment ion m/z 60 derived from ACSM and PMF-analyzed organic fractions related to biomass burning (e.g. BBOA). In contrast, BrC absorption decreases significantly during daytime as well as in the warm period, reaching to a minimum during the early-afternoon hours in all seasons due to photo-chemical degradation. Estimated secondary BrC absorption is practically evident only during winter night-time, implying the fast oxidation of BrC species from RWB emissions. Changes in mixing-layer height do not significantly affect the BrC absorption in winter, while they play a major role in summer.
Keywords:spectral aerosol absorption, brown carbon, wood burning, organic aerosols, chemical composition, Athens
Publication status:Published
Publication version:Version of Record
Publication date:01.03.2020
Year of publishing:2020
Number of pages:str. 1-14
Numbering:Vol. 708, [article no.] 135019
PID:20.500.12556/RUNG-9052 New window
COBISS.SI-ID:195079171 New window
ISSN:0048-9697
UDC:53
ISSN on article:1879-1026
DOI:10.1016/j.scitotenv.2019.135019 New window
NUK URN:URN:SI:UNG:REP:4TJXEMYL
Publication date in RUNG:10.05.2024
Views:1780
Downloads:3
Metadata:XML DC-XML DC-RDF
:
LIAKAKOU, Eleni, KASKAOUTIS, Dimitris G., GRIVAS, Georgios, STAVROULAS, Iasonas, TSAGKARAKI, M., PARASKEVOPOULOU, D., BOUGIATIOTI, Aikaterini, DUMKA, Umesh Chandra, GERASOPOULOS, Evangelos and MIHALOPOULOS, Nikolaos, 2020, Long-term brown carbon spectral characteristics in a Mediterranean city (Athens). Science of the total environment [online]. 2020. Vol. 708, no. 135019, p. 1–14. [Accessed 7 April 2025]. DOI 10.1016/j.scitotenv.2019.135019. Retrieved from: https://www.sciencedirect.com/science/article/pii/S0048969719350119?via%3Dihub
Copy citation
  
Average score:
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
(0 votes)
Your score:Voting is allowed only for logged in users.
Share:Bookmark and Share



Similar works from other repositories:

No similar works found

Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Record is a part of a journal

Title:Science of the total environment
Publisher:Elsevier
ISSN:1879-1026
COBISS.SI-ID:23110917 New window

Licences

License:Other
Description:https://www.elsevier.com/tdm/userlicense/1.0/
Licensing start date:01.03.2020
License:Other
Description:http://www.elsevier.com/open-access/userlicense/1.0/
Licensing start date:08.01.2021

Back