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Title:Atmospheric black carbon in the metropolitan area of La Paz and El Alto, Bolivia: concentration levels and emission sources
Authors:ID Mardoñez-Balderrama, Valeria (Author)
ID Močnik, Griša (Author)
ID Pandolfi, Marco (Author)
ID Modini, Robin L. (Author)
ID Velarde, Fernando (Author)
ID Renzi, Laura (Author)
ID Marinoni, Angela (Author)
ID Jaffrezo, Jean-Luc (Author)
ID Moreno R., Isabel (Author)
ID Aliaga, Diego (Author)
Files:URL https://acp.copernicus.org/articles/24/12055/2024/
 
.pdf Mardonez_-_ACP_2024_-_Atmospheric_BC_in_the_metropolitan_area_of_La_Paz_and_El_Alto_-_concentrations_and_sources.pdf (3,35 MB)
MD5: 83E5DFD1022B951E6B13842DAAB131B2
 
URL https://acp.copernicus.org/articles/24/12055/2024/acp-24-12055-2024.pdf
 
Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:Abstract. Black carbon (BC) is a major component of submicron particulate matter (PM), with significant health and climate impacts. Many cities in emerging countries lack comprehensive knowledge about BC emissions and exposure levels. This study investigates BC concentration levels, identifies its emission sources, and characterizes the optical properties of BC at urban background sites of the two largest high-altitude Bolivian cities: La Paz (LP) (3600 m above sea level) and El Alto (EA) (4050 m a.s.l.), where atmospheric oxygen levels and intense radiation may affect BC production. The study relies on concurrent measurements of equivalent black carbon (eBC), elemental carbon (EC), and refractory black carbon (rBC) and their comparison with analogous data collected at the nearby Chacaltaya Global Atmosphere Watch Station (5240 m a.s.l). The performance of two independent source apportionment techniques was compared: a bilinear model and a least-squares multilinear regression (MLR). Maximum eBC concentrations were observed during the local dry season (LP: eBC = 1.5 ± 1.6 µg m−3; EA: 1.9±2.0 µg m−3). While eBC concentrations are lower at the mountain station, daily transport from urban areas is evident. Average mass absorption cross sections of 6.6–8.2 m2 g−1 were found in the urban area at 637 nm. Both source apportionment methods exhibited a reasonable level of agreement in the contribution of biomass burning (BB) to absorption. The MLR method allowed the estimation of the contribution and the source-specific optical properties for multiple sources, including open waste burning.
Keywords:black carbon, aerosol absorption, source apportionment, mass absorption cross-section
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2024
Year of publishing:2024
Number of pages:str. 12055-12077
Numbering:Vol. 24, issue 20
PID:20.500.12556/RUNG-9438 New window
COBISS.SI-ID:213241347 New window
UDC:502.3/.7
ISSN on article:1680-7324
eISSN:1680-7324
DOI:10.5194/acp-24-12055-2024 New window
NUK URN:URN:SI:UNG:REP:FKZN3VW1
Publication date in RUNG:29.10.2024
Views:898
Downloads:1
Metadata:XML DC-XML DC-RDF
:
MARDOÑEZ-BALDERRAMA, Valeria, MOČNIK, Griša, PANDOLFI, Marco, MODINI, Robin L., VELARDE, Fernando, RENZI, Laura, MARINONI, Angela, JAFFREZO, Jean-Luc, MORENO R., Isabel and ALIAGA, Diego, 2024, Atmospheric black carbon in the metropolitan area of La Paz and El Alto, Bolivia: concentration levels and emission sources. Atmospheric chemistry and physics [online]. 2024. Vol. 24, no. 20, p. 12055–12077. [Accessed 11 April 2025]. DOI 10.5194/acp-24-12055-2024. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=9438
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Record is a part of a journal

Title:Atmospheric chemistry and physics
Shortened title:Atmos. chem. phys.
Publisher:European Geophysical Society, Copernicus GmbH
ISSN:1680-7324
COBISS.SI-ID:1959012 New window

Document is financed by a project

Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P1-0385-2020
Name:Daljinsko zaznavanje atmosferskih lastnosti

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:28.10.2024

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