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| Titel |
Mapping Asian anthropogenic emissions of non-methane volatile organic compounds to multiple chemical mechanisms |
| VerfasserIn |
M. Li, Q. Zhang, D. G. Streets, K. B. He, Y. F. Cheng, L. K. Emmons, H. Huo, S. C. Kang, Z. Lu, M. Shao, H. Su, X. Yu, Y. Zhang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 11 ; Nr. 14, no. 11 (2014-06-05), S.5617-5638 |
| Datensatznummer |
250118777
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| Publikation (Nr.) |
 copernicus.org/acp-14-5617-2014.pdf |
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| Zusammenfassung |
| An accurate speciation mapping of non-methane volatile organic compounds
(NMVOC) emissions has an important impact on the performance of chemical
transport models (CTMs) in simulating ozone mixing ratios and secondary
organic aerosols. Taking the INTEX-B Asian NMVOC emission inventory as the
case, we developed an improved speciation framework to generate model-ready
anthropogenic NMVOC emissions for various gas-phase chemical mechanisms
commonly used in CTMs in this work, by using an explicit assignment approach
and updated NMVOC profiles. NMVOC profiles were selected and aggregated from
a wide range of new measurements and the SPECIATE database v.4.2. To reduce
potential uncertainty from individual measurements, composite profiles were
developed by grouping and averaging source profiles from the same category.
The fractions of oxygenated volatile organic compounds (OVOC) were corrected
during the compositing process for those profiles which used improper
sampling and analyzing methods. Emissions of individual species were then
lumped into species in different chemical mechanisms used in CTMs by applying
mechanism-dependent species mapping tables, which overcomes the weakness of
inaccurate mapping in previous studies. Emission estimates for individual
NMVOC species differ between one and three orders of magnitude for some
species when different sets of profiles are used, indicating that source
profile is the most important source of uncertainties of individual species
emissions. However, those differences are diminished in lumped species as a
result of the lumping in the chemical mechanisms. Gridded emissions for eight
chemical mechanisms at 30 min × 30 min resolution as well as the
auxiliary data are available at
http://mic.greenresource.cn/intex-b2006. The framework proposed in this
work can be also used to develop speciated NMVOC emissions for other regions. |
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