Repozitorij Univerze v Novi Gorici

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Naslov:A dual-wavelength photothermal aerosol absorption monitor : design, calibration and performance
Avtorji:ID Drinovec, Luka (Avtor)
ID Jagodič, Uroš (Avtor)
ID Pirker, Luka (Avtor)
ID Škarabot, Miha (Avtor)
ID Kurtjak, Mario (Avtor)
ID Vidović, Kristijan (Avtor)
ID Ferrero, Luca (Avtor)
ID Visser, Bradley (Avtor)
ID Röhrbein, Jannis (Avtor)
ID Weingartner, Ernest (Avtor)
ID Kalbermatter, Daniel M. (Avtor)
ID Vasilatou, Konstantina (Avtor)
ID Močnik, Griša (Avtor)
Datoteke:URL https://amt.copernicus.org/articles/15/3805/2022/
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:There exists a lack of aerosol absorption measurement techniques with low uncertainties and without artefacts. We have developed the two-wavelength Photothermal Aerosol Absorption Monitor (PTAAM-2λ), which measures the aerosol absorption coefficient at 532 and 1064 nm. Here we describe its design, calibration and mode of operation and evaluate its applicability, limits and uncertainties. The 532 nm channel was calibrated with ∼ 1 µmol mol−1 NO2, whereas the 1064 nm channel was calibrated using measured size distribution spectra of nigrosin particles and a Mie calculation. Since the aerosolized nigrosin used for calibration was dry, we determined the imaginary part of the refractive index of nigrosin from the absorbance measurements on solid thin film samples. The obtained refractive index differed considerably from the one determined using aqueous nigrosin solution. PTAAM-2λ has no scattering artefact and features very low uncertainties: 4 % and 6 % for the absorption coefficient at 532 and 1064 nm, respectively, and 9 % for the absorption Ångström exponent. The artefact-free nature of the measurement method allowed us to investigate the artefacts of filter photometers. Both the Aethalometer AE33 and CLAP suffer from cross-sensitivity to scattering – this scattering artefact is most pronounced for particles smaller than 70 nm. We observed a strong dependence of the filter multiple scattering parameter on the particle size in the 100–500 nm range. The results from the winter ambient campaign in Ljubljana showed similar multiple scattering parameter values for ambient aerosols and laboratory experiments. The spectral dependence of this parameter resulted in AE33 reporting the absorption Ångström exponent for different soot samples with values biased 0.23–0.35 higher than the PTAAM-2λ measurement. Photothermal interferometry is a promising method for reference aerosol absorption measurements.
Ključne besede:aerosol absorption, calibration, black carbon
Leto izida:2022
Št. strani:str. 3805–3825
Številčenje:Vol. 15, iss. 12
PID:20.500.12556/RUNG-7397 Novo okno
COBISS.SI-ID:99980547 Novo okno
UDK:54
ISSN pri članku:1867-1381
DOI:10.5194/amt-2022-21 Novo okno
NUK URN:URN:SI:UNG:REP:YAPXBUJG
Datum objave v RUNG:28.06.2022
Število ogledov:2583
Število prenosov:27
Metapodatki:XML DC-XML DC-RDF
:
DRINOVEC, Luka, JAGODIČ, Uroš, PIRKER, Luka, ŠKARABOT, Miha, KURTJAK, Mario, VIDOVIĆ, Kristijan, FERRERO, Luca, VISSER, Bradley, RÖHRBEIN, Jannis, WEINGARTNER, Ernest, KALBERMATTER, Daniel M., VASILATOU, Konstantina in MOČNIK, Griša, 2022, A dual-wavelength photothermal aerosol absorption monitor : design, calibration and performance. Atmospheric measurement techniques [na spletu]. 2022. Vol. 15, no. 12. [Dostopano 7 april 2025]. DOI 10.5194/amt-2022-21. Pridobljeno s: https://amt.copernicus.org/articles/15/3805/2022/
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Gradivo je del revije

Naslov:Atmospheric measurement techniques
Skrajšan naslov:Atmos. meas. tech.
Založnik:Copernicus Publications
ISSN:1867-1381
COBISS.SI-ID:517910809 Novo okno

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P1-0385, P1-0099, I-0033

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:kemija, aerosoli, meritve, modeliranje, kalibriranje


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