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Modeling of daytime HONO vertical gradients during SHARP 2009

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Fig. 1. Upper panel: time series of measured NO 2 photolysis fre- fre-quencies J NO 2 , photolysis frequency of NO 2 to NO 2∗ , J NO 2 →NO 2 ∗ , normalized solar visible irradiance, and UV irradiance are shown as dashed lines (see Wong et al., 2012 for det
Fig. 2. HONO emission rate in the altitude interval between 0.1–1 m due to traffic in the model.
Fig. 3. Comparisons between observations and model results with- with-out photolytic HONO source
Fig. 5. Comparisons between observations and model results with a photolytic HONO source on aerosol only
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