| Title: | A new optical-based technique for real-time measurements of mineral dust concentration in PM10 using a virtual impactor |
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| Authors: | ID Drinovec, Luka, Institut Jožef Stefan (Author)
ID Sciare, Jean, Cyprus Institute (Author)
ID Stavroulas, Iasonas, Cyprus Institute (Author)
ID Bezantakos, Spiros, Cyprus Institute (Author)
ID Pikridas, Michael, Cyprus Institute (Author)
ID UNGA, FLORIN, Cyprus Institute (Author)
ID Savvides, Chrysanthos, Ministry of Labour Cyprus (Author)
ID Višnjić, Bojana, Institute of Physics Belgrade (Author)
ID Remškar, Maja, Institut Jožef Stefan (Author)
ID Močnik, Griša, Univerza v Novi Gorici (Author) |
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| Files: |
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| 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 |
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| Keywords: | aerosol absorption, mineral dust, on-line detection, air quality |
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| Publication version: | Version of Record |
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| Year of publishing: | 2020 |
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| Number of pages: | 3799-3813 |
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| Numbering: | 13, 7 |
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| PID: | 20.500.12556/RUNG-5654 |
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| COBISS.SI-ID: | 22985475 |
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| DOI: | 10.5194/amt-13-3799-2020 |
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| NUK URN: | URN:SI:UNG:REP:9JIBT91X |
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| Publication date in RUNG: | 20.07.2020 |
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| Views: | 3647 |
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| Downloads: | 0 |
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