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  Daytime formation of nitrous acid at a coastal remote site in Cyprus indicating a common ground source of atmospheric HONO and NO

Meusel, H., Kuhn, U., Reiffs, A., Mallik, C., Harder, H., Martinez, M., et al. (2016). Daytime formation of nitrous acid at a coastal remote site in Cyprus indicating a common ground source of atmospheric HONO and NO. Atmospheric Chemistry and Physics Discussions, 16.

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 Creators:
Meusel, H.1, Author              
Kuhn, U.1, Author              
Reiffs, Andreas2, Author              
Mallik, Chinmay3, Author
Harder, H.2, Author              
Martinez, M.2, Author              
Schuladen, J.2, Author              
Bohn, Birger3, Author
Parchatka, U.2, Author              
Crowley, J. N.2, Author              
Fischer, H.2, Author              
Tomsche, L.2, Author              
Novelli, A.2, Author              
Hoffmann , Thorsten3, Author
Janssen, R. H. H.2, Author              
Hartogensis, Oscar3, Author
Pikridas, Michael3, Author
Vrekoussis, Mihalis3, Author
Bourtsoukidis, E.2, Author              
Weber, B.1, Author              
Lelieveld, J.2, Author              Williams, J.2, Author              Pöschl, U.1, Author              Cheng, Y.1, Author              Su, H.1, Author               more..
Affiliations:
1Multiphase Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826290              
2Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826285              
3external, ou_persistent22              

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 Abstract: Characterization of daytime sources of nitrous acid (HONO) is crucial to understand atmospheric oxidation and radical cycling in the planetary boundary layer. HONO and numerous other atmospheric trace constituents were measured on the Mediterranean island of Cyprus during the CYPHEX (CYprus PHotochemical EXperiment) campaign in summer 2014. Average volume mixing ratios of HONO were 35 pptv (+/- 25 pptv) with a HONO/NOx ratio of 0.33, which was considerably higher than reported for most other rural and urban regions. Diel profiles of HONO showed peak values in the late morning (60 +/- 28 pptv around 09: 00 local time) and persistently high mixing ratios during daytime (45 +/- 18 pptv), indicating that the photolytic loss of HONO is compensated by a strong daytime source. Budget analyses revealed unidentified sources producing up to 3.4 x 10(6) molecules cm(-3) s(-1) of HONO and up to 2.0 x 10(7) molecules cm(-3) s(-1) NO. Under humid conditions (relative humidity > 70 %), the source strengths of HONO and NO exhibited a close linear correlation (R-2 = 0: 72), suggesting a common source that may be attributable to emissions from microbial communities on soil surfaces.

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Language(s): eng - English
 Dates: 2016
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.5194/acp-2016-554
 Degree: -

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Title: Atmospheric Chemistry and Physics Discussions
  Abbreviation : Atmos. Chem. Phys. Discuss.
Source Genre: Journal
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Publ. Info: Katlenburg-Lindau, Germany : European Geophysical Society, Copernicus Publ.
Pages: 30 Volume / Issue: 16 Sequence Number: - Start / End Page: - Identifier: ISSN: 1680-7367
CoNE: https://pure.mpg.de/cone/journals/resource/111076360006006