Articles | Volume 20, issue 8
Atmos. Chem. Phys., 20, 5071–5092, 2020
https://doi.org/10.5194/acp-20-5071-2020

Special issue: In-depth study of air pollution sources and processes within...

Atmos. Chem. Phys., 20, 5071–5092, 2020
https://doi.org/10.5194/acp-20-5071-2020

Research article 29 Apr 2020

Research article | 29 Apr 2020

High-resolution vertical distribution and sources of HONO and NO2 in the nocturnal boundary layer in urban Beijing, China

Fanhao Meng et al.

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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Fanhao Meng on behalf of the Authors (29 Jan 2020)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (30 Jan 2020) by Jennifer G. Murphy
RR by Anonymous Referee #3 (17 Feb 2020)
RR by Anonymous Referee #1 (23 Feb 2020)
ED: Publish subject to minor revisions (review by editor) (24 Feb 2020) by Jennifer G. Murphy
AR by Fanhao Meng on behalf of the Authors (03 Mar 2020)  Author's response    Manuscript
ED: Publish subject to technical corrections (25 Mar 2020) by Jennifer G. Murphy
AR by Fanhao Meng on behalf of the Authors (01 Apr 2020)  Author's response    Manuscript
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Short summary
Nitrous acid (HONO), a major precursor of the OH radical, plays a key role in atmospheric chemistry, but its sources are still debated. The first high-resolution vertical measurements of HONO and NO2 were conducted in Beijing to investigate the nocturnal sources of HONO at different stages of pollution. The ground surface dominated HONO production by heterogeneous conversion of NO2 during clean episodes, but the aerosol production was an important nighttime HONO source during haze episodes.
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