Technical Comments

Comment on "Atmospheric Hydroxyl Radical Production from Electronically Excited NO2 and H2O"

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Science  17 Apr 2009:
Vol. 324, Issue 5925, pp. 336
DOI: 10.1126/science.1166669

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Li et al. (Reports, 21 March 2008, p. 1657) suggested that the reaction between electronically excited nitrogen dioxide and water vapor is an important atmospheric source of the hydroxyl radical. However, under conditions that better approximate the solar flux, we find no evidence for OH production from this reaction.

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