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Background on Rethinking Organic Aerosols: Semivolatile Emissions and Photochemical Aging by Robinson et al.

April 2nd, 2007 · No Comments

Editor’s note: The following post was graciously contributed by Peter DeCarlo, a fellow Ph.D. candidate at the University of Colorado. His piece offers some background and commentary on the previous post.

Organic aerosols are studied in a variety of ways (field observations, lab studies, modeling, etc.) as most atmospheric constituents tend to be. With organic aerosols there have been considerable discrepancies in recent years between what is measured in the field, and what is modeled. Models assume a large fraction of the organic aerosol is primary based on early aerosol studies involving GC-MS (coupled gas chromatography and mass spectrometry). These studies found a significant portion of the resolvable aerosol to be primary…

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Tags: aerosols · field measurements · modeling · troposphere

The newly discovered dynamic role of primary organic aerosols

April 2nd, 2007 · 1 Comment

An article by Robinson et al. appeared in Science last month and presented laboratory evidence that primary organic aerosols (the term given to aerosols directly injected into the atmosphere from a source) may generate more secondary aerosols (those that form from the oxidation of gas-phase precursors) than previously thought from atmospheric chemistry models.

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