Naslov: | Secondary organic aerosol formation from semi- and intermediate-volatility organic compounds and glyoxal : relevance of O/C as a tracer for aqueous multiphase chemistry |
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Avtorji: | ID Waxman, Eleanor M. (Avtor) ID Džepina, Katja (Avtor) ID Ervens, Barbara (Avtor) ID Lee-Taylor, Julia (Avtor) ID Aumont, Bernard (Avtor) ID Jimenez, Jose L. (Avtor) ID Madronich, Sasha (Avtor) ID Volkamer, Rainer (Avtor) |
Datoteke: |
Gradivo nima datotek, ki so prostodostopne za javnost. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. |
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Jezik: | Angleški jezik |
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Vrsta gradiva: | Neznano |
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Tipologija: | 1.01 - Izvirni znanstveni članek |
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Organizacija: | UNG - Univerza v Novi Gorici
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Opis: | The role of aqueous multiphase chemistry in the formation of secondary organic aerosol (SOA) remains difficult to quantify. We investigate it here by testing the rapid formation of moderate oxygen-to-carbon (O/C) SOA during a case study in Mexico City. A novel laboratory-based glyoxal-SOA mechanism is applied to the field data, and explains why less gas-phase glyoxal mass is observed than predicted. Furthermore, we compare an explicit gas-phase chemical mechanism for SOA formation from semi- and intermediate-volatility organic compounds (S/IVOCs) with empirical parameterizations of S/IVOC aging. The mechanism representing our current understanding of chemical kinetics of S/IVOC oxidation combined with traditional SOA sources and mixing of background SOA underestimates the observed O/C by a factor of two at noon. Inclusion of glyoxal-SOA with O/C of 1.5 brings O/C predictions within measurement uncertainty, suggesting that field observations can be reconciled on reasonable time scales using laboratory-based empirical relationships for aqueous chemistry. |
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Ključne besede: | secondary organic aerosol, glyoxal, aqueous multiphase chemistry, oxygen-to-carbon ratio, single scattering albedo |
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Leto izida: | 2013 |
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Št. strani: | str. 978-982 |
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Številčenje: | Vol. 40, iss. 5 |
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PID: | 20.500.12556/RUNG-6453 |
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COBISS.SI-ID: | 59044867 |
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UDK: | 54 |
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ISSN pri članku: | 0094-8276 |
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DOI: | 10.1002/grl.50203 |
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NUK URN: | URN:SI:UNG:REP:MLS5EVLQ |
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Datum objave v RUNG: | 11.04.2021 |
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Število ogledov: | 2965 |
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Število prenosov: | 0 |
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