 |
| Titel |
Volatility basis-set approach simulation of organic aerosol formation in East Asia: implications for anthropogenic–biogenic interaction and controllable amounts |
| VerfasserIn |
H. Matsui, M. Koike, Y. Kondo, A. Takami, J. D. Fast, Y. Kanaya, M. Takigawa |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 18 ; Nr. 14, no. 18 (2014-09-16), S.9513-9535 |
| Datensatznummer |
250119025
|
| Publikation (Nr.) |
 copernicus.org/acp-14-9513-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| Organic aerosol (OA) simulations using the volatility basis-set approach
were made for East Asia and its outflow region. Model simulations were
evaluated through comparisons with OA measured by aerosol mass spectrometers
in and around Tokyo (at Komaba and Kisai in summer 2003 and 2004) and over
the outflow region in East Asia (at Fukue and Hedo in spring 2009). The
simulations with aging processes of organic vapors
reproduced the mass concentrations, temporal variations, and formation
efficiencies of observed OA at all of the sites reasonably well. As OA mass was severely
underestimated in the simulations without the aging processes, the
oxidations of organic vapors are essential for reasonable OA simulations
over East Asia. By considering the aging processes, simulated OA
concentrations increased from 0.24 to 1.28 μg m−3 in the
boundary layer over the whole of East Asia. OA formed from the interaction
of anthropogenic and biogenic sources was also enhanced by the aging
processes. The fraction of controllable OA was estimated to be 87% of
total OA over the whole of East Asia, which indicated that most of the OA in
our simulations were formed anthropogenically (from controllable combustion
sources). A large portion of biogenic secondary OA (78% of biogenic
secondary OA) was formed through the influence of anthropogenic sources.
These fractions were higher than the fraction of anthropogenic emissions. An
important reason for these higher controllable fractions was higher oxidant
concentrations and the resulting faster oxidation rates of OA precursors by
considering anthropogenic sources. Both the amounts (from 0.18 to 1.12 μg m−3) and the fraction (from 75 to 87%) of
controllable OA were increased by aging processes of organic vapors over
East Asia. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|