ǂa ǂnew system using lab-generated soot coated with controlled amounts of secondary organic matter
Daniel M. Kalbermatter (Avtor), Griša Močnik (Avtor), Luka Drinovec (Avtor), Bradley Visser (Avtor), Jannis Röhrbein (Avtor), Matthias Oscity (Avtor), Ernest Weingartner (Avtor), Antti-Pekka Hyvärinen (Avtor), Konstantina Vasilatou (Avtor)

Povzetek

We report on an inter-comparison of black-carbon- and aerosol-absorption-measuring instruments with laboratory-generated soot particles coated with controlled amounts of secondary organic matter (SOM). The aerosol generation setup consisted of a miniCAST 5201 Type BC burner for the generation of soot particles and a new automated oxidation flow reactor based on the micro smog chamber (MSC) for the generation of SOM from the ozonolysis of α-pinene. A series of test aerosols was generated with elemental to total carbon (EC  TC) mass fraction ranging from about 90 % down to 10 % and single-scattering albedo (SSA at 637 nm) from almost 0 to about 0.7. A dual-spot Aethalometer AE33, a photoacoustic extinctiometer (PAX, 870 nm), a multi-angle absorption photometer (MAAP), a prototype photoacoustic instrument, and two prototype photo-thermal interferometers (PTAAM-2λ and MSPTI) were exposed to the test aerosols in parallel. Significant deviations in the response of the instruments were observed depending on the amount of secondary organic coating. We believe that the setup and methodology described in this study can easily be standardised and provide a straightforward and reproducible procedure for the inter-comparison and characterisation of both filter-based and in situ black-carbon-measuring (BC-measuring) instruments based on realistic test aerosols.

Ključne besede

black carbon;aerosol absorption;secondary organic aerosol;coating;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UNG - Univerza v Novi Gorici
UDK: 502.3/.7
COBISS: 95895811 Povezava se bo odprla v novem oknu
ISSN: 1867-8548
Št. ogledov: 920
Št. prenosov: 38
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni naslov: Comparing black-carbon- and aerosol-absorption-measuring instruments
URN: URN:SI:UNG
Strani: str. 561-572
Letnik: ǂVol. ǂ15
Zvezek: ǂiss. ǂ2
Čas izdaje: 2022
DOI: 10.5194/amt-15-561-2022
ID: 14418364
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