Development of a condensed SAPRC-07 chemical mechanism

The development of a condensed version of the SAPRC-07 mechanism, designated CS07A, is described. It is comparable in size to CB05 and was derived directly from detailed SAPRC-07, which serves as the basis for its predictive capability and evaluation against chamber data. It incorporates the more co...

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Bibliographic Details
Published in:Atmospheric environment (1994) 2010-12, Vol.44 (40), p.5336-5345
Main Author: Carter, William P.L.
Format: Article
Language:English
Subjects:
Airshed models
Approximation
Chemical mechanism
Condensed mechanisms
Condensing
Earth, ocean, space
Exact sciences and technology
External geophysics
Isoprene
Lumping
Mathematical models
Meteorology
Ozone
Priorities
Radicals
SAPRC-07
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Description
Summary:The development of a condensed version of the SAPRC-07 mechanism, designated CS07A, is described. It is comparable in size to CB05 and was derived directly from detailed SAPRC-07, which serves as the basis for its predictive capability and evaluation against chamber data. It incorporates the more condensed and approximate peroxy radical lumped operator method employed in SAPRC-99, and condensations involving removing or lumping less reactive compounds, lumping some product species in isoprene or aromatic mechanisms with other species with similar mechanisms using reactivity weighting, removing some compounds and reactions that are rapidly reversed, and using fewer model species to represent emitted alkanes and similar species. It gives predictions of O 3, total PANs and OH radicals that are very close to the standard SAPRC-07 mechanism for airshed models used as the starting point, but predicts about 15% more H 2O 2. Use of CS07A is suitable for models where the priority is O 3 formation, while the less condensed version should be used if more accurate hydroperoxide predictions are a priority.
ISSN:1352-2310
1873-2844
DOI:10.1016/j.atmosenv.2010.01.024