Dicarbonyls simulation

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The dicarbonyls simulation is currently not compatible with GEOS-Chem v9-02 and higher versions. It needs to be re-integrated into the FlexChem chemistry solver.

This page describes the optional dicarbonyls chemistry mechanism as implemented in GEOS-Chem.


Brief description

From Fu et al [2008]:

We use the Master Chemistry Mechanism version 3.1 (MCMv3.1) [Saunders et al., 2003; Bloss et al., 2005] as principal guide for the VOC chemistry leading to glyoxal and methylglyoxal formation. Primary VOC precursors include isoalkanes, alkenes, acetylene, aromatics, isoprene, monoterpenes, acetone, methylbutenol (2-methyl-3-buten-2-ol), glycolaldehyde, and hydroxyacetone. The latter two are secondary products of VOC oxidation but are also emitted directly by biofuel use and open biomass burning. Glyoxal and methylglyoxal are themselves also emitted directly from these two sources [McDonald et al., 2000; Hays et al., 2002]. Primary anthropogenic emissions of glyoxal and methylglyoxal are small [Environmental Protection Agency, 2004; Volkamer et al., 2005b] and are not considered here.
GEOS-Chem includes a detailed O3-NOx-VOC-aerosol chemical mechanism [Horowitz et al., 1998; Bey et al., 2001; Martin et al., 2003; Park et al., 2006]. ... Fu et al. [2007] added to the model the chemistry of ethylene and xylenes For this work, we further updated the photochemical mechanisms of isoprene, propene, acetylene, glyoxal, methylglyoxal, glycolaldehyde, and hydroxyacetone based on MCMv3.1 and Jet Propulsion Laboratory (JPL) [2006]. The quantum yield for acetone photolysis is updated to be dependent on both temperature and pressure, based on Blitz et al. [2004]. We also added parameterized dicarbonyl production from benzene, toluene, xylenes, monoterpenes, and methylbutenol.

Authors and collaborators

Dicarbonyls simulation user groups

User Group Personnel Projects
Peking University Tzung-May Fu ...
Univeristy of Minnesoata Dylan Millet ...
Colorado State University Colette Heald ...

--Bob Y. 16:10, 26 February 2010 (EST)


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