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Naslov:Determining the Aethalometer multiple scattering enhancement factor C from the filter loading parameter
Avtorji:ID Ferrero, Luca (Avtor)
ID Losi, Niccolò (Avtor)
ID Rigler, Martin (Avtor)
ID Gregorič, Asta (Avtor)
ID Colombi, C. (Avtor)
ID D'Angelo, L. (Avtor)
ID Cuccia, E. (Avtor)
ID Cefalì, A. M. (Avtor)
ID Gini, I. (Avtor)
ID Doldi, A. (Avtor)
Datoteke:.pdf STOTEN-2024-Ferrero-Multiple_scattering_C_from_loading_parameter.pdf (3,18 MB)
MD5: 89E1808F8C0E3B1588FF783C1AE502E9
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Light-absorbing aerosols heat the atmosphere; an accurate quantification of their absorption coefficient is mandatory. However, standard reference instruments (CAPS, MAAP, PAX, PTAAM) are not always available at each measuring site around the world. By integrating all previous published studies concerning the Aethalometers, the AE33 filter loading parameter, provided by the dual-spot algorithm, were used to determine the multiple scattering enhancement factor from the Aethalometer itself (hereinafter CAE) on an yearly and a monthly basis. The method was developed in Milan, where Aethalometer measurements were compared with MAAP data; the comparison showed a good agreement in terms of equivalent black carbon (R2 = 0.93; slope = 1.02 and a negligible intercept = 0.12 μg m−3) leading to a yearly experimental multiple scattering enhancement factor of 2.51 ± 0.04 (hereinafter CMAAP). On a yearly time base the CAE values obtained using the new approach was 2.52 ± 0.01, corresponding to the experimental one (CMAAP). Considering the seasonal behavior, higher experimental CMAAP and computed CAE values were found in summer (2.83 ± 0.12) whereas, the lower ones in winter/early-spring (2.37 ± 0.03), in agreement with the single scattering albedo behavior in the Po Valley. Overall, the agreement between the experimental CMAAP and CAE showed a root mean squared error (RMSE) of just 0.038 on the CMAAP prediction, characterized by a slope close to 1 (1.001 ± 0.178), a negligible intercept (−0.002 ± 0.455) and a high degree of correlation (R2 = 0.955). From an environmental point of view, the application of a dynamic (space/time) determination of CAE increases the accuracy of the aerosol heating rate (compared to applying a fixed C value) up to 16 % solely in Milan, and to 114 % when applied in the Arctic at 80°N.
Ključne besede:aethalometer, C factor, loading parameter, MAAP, heating rate
Datum objave:01.01.2024
Leto izida:2024
Št. strani:str. 1-20
Številčenje:Vol. 917, [article no.] ǂ170221
COBISS.SI-ID:183608579 Novo okno
UDK:53
ISSN pri članku:0048-9697
DOI:10.1016/j.scitotenv.2024.170221 Novo okno
NUK URN:URN:SI:UNG:REP:K4QKHFZO
Datum objave v RUNG:02.02.2024
Število ogledov:239
Število prenosov:3
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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Gradivo je del revije

Naslov:Science of the total environment
Skrajšan naslov:Sci. total environ.
Založnik:Elsevier
ISSN:0048-9697
COBISS.SI-ID:26369024 Novo okno

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