Sensitivity of ozone production rate to ozone precursors

Details Sensitivity of ozone production rate to ozone precursors Sensitivity of ozone production rate to ozone precursors

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2903k&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 15, p. 2903-2906

Physics

11

Atmospheric Composition And Structure: Pollution-Urban And Regional, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry

Scientific paper

The photochemical equations describing O3 formation in the lower troposphere contain 2 major sink terms for free radicals; combination reactions and reactions with NOx. Knowing the fraction of radicals removed by reactions with NOx, termed LN/Q, allows one to predict the sensitivity of O3 production to NO and VOCs. We derive an analytic formula that gives LN/Q in terms of readily measured O3 precursors and test this formula using constrained steady state calculations based on field observations gathered in Phoenix, Arizona. The formula quantifies well-known results regarding the effects of dilution, oxidation, and the production of oxidants on the transition from VOC to NOx sensitive behavior as an air parcel is advected away from an urban source.

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