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Title:A new optical-based technique for real-time measurements of mineral dust concentration in PM10 using a virtual impactor
Authors:Drinovec, Luka (Author)
Sciare, Jean (Author)
Stavroulas, Iasonas (Author)
Bezantakos, S. (Author)
Pikridas, Michael (Author)
Unga, Florin (Author)
Savvides, Chrysanthos (Author)
Višnjić, Bojana (Author)
Remškar, Maja (Author)
Močnik, Griša (Author)
Files:This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Language:English
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:Atmospheric mineral dust influences Earth’s radiative budget, cloud formation, and lifetime; has adverse health effects; and affects air quality through the increase of regulatory PM10 concentrations, making its real-time quantification in the atmosphere of strategic importance. Only few near-real-time techniques can discriminate dust aerosol in PM10 samples and they are based on the dust chemical composition. The online determination of mineral dust using aerosol absorption photometers offers an interesting and competitive alternative but remains a difficult task to achieve. This is particularly challenging when dust is mixed with black carbon, which features a much higher mass absorption cross section. We build on previous work using filter photometers and present here for the first time a highly timeresolved online technique for quantification of mineral dust concentration by coupling a high-flow virtual impactor (VI) sampler that concentrates coarse particles with an aerosol absorption photometer (Aethalometer, model AE33). The absorption of concentrated dust particles is obtained by subtracting the absorption of the submicron (PM1) aerosol fraction from the absorption of the virtual impactor sample (VIPM1 method). This real-time method for detecting desert dust was tested in the field for a period of 2 months (April and May 2016) at a regional background site of Cyprus, in the Eastern Mediterranean. Several intense desert mineral dust events were observed during the field campaign with dust concentration in PM10 up to 45 μgm
Keywords:aerosol absorption, mineral dust, on-line detection, air quality
Year of publishing:2020
Number of pages:3799-3813
Numbering:7, 13
COBISS_ID:22985475 Link is opened in a new window
URN:URN:SI:UNG:REP:9JIBT91X
DOI:10.5194/amt-13-3799-2020 Link is opened in a new window
License:CC BY 4.0
This work is available under this license: Creative Commons Attribution 4.0 International
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Record is a part of a journal

Title:Atmospheric Measurement Techniques
Shortened title:Atmos. Meas. Tech.
Publisher:EGU
ISSN:1867-1381
Year of publishing:2020

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