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| Titel |
simpleGAMMA v1.0 – a reduced model of secondary organic aerosol formation in the aqueous aerosol phase (aaSOA) |
| VerfasserIn |
J. L. Woo, V. F. McNeill |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 8, no. 6 ; Nr. 8, no. 6 (2015-06-22), S.1821-1829 |
| Datensatznummer |
250116411
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| Publikation (Nr.) |
 copernicus.org/gmd-8-1821-2015.pdf |
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| Zusammenfassung |
| There is increasing evidence that the uptake and aqueous processing of
water-soluble volatile organic compounds (VOCs) by wet aerosols or cloud
droplets is an important source of secondary organic aerosol (SOA). We
recently developed GAMMA (Gas–Aerosol Model for Mechanism Analysis), a
zero-dimensional kinetic model that couples gas-phase and detailed
aqueous-phase atmospheric chemistry for speciated prediction of SOA and
organosulfate formation in cloud water or aqueous aerosols. Results from GAMMA
simulations of SOA formation in aerosol water (aaSOA) (McNeill et al., 2012)
indicate that it is dominated by two pathways: isoprene epoxydiol (IEPOX)
uptake followed by ring-opening chemistry (under low-NOx conditions) and
glyoxal uptake. This suggested that it is possible to model the majority of
aaSOA mass using a highly simplified reaction scheme. We have therefore
developed a reduced version of GAMMA, simpleGAMMA. Close agreement in
predicted aaSOA mass is observed between simpleGAMMA and GAMMA under all
conditions tested (between pH 1–4 and RH 40–80 %) after 12 h of
simulation. simpleGAMMA is computationally efficient and suitable for
coupling with larger-scale atmospheric chemistry models or analyzing ambient
measurement data. |
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