Articles | Volume 17, issue 13
https://doi.org/10.5194/acp-17-8269-2017
https://doi.org/10.5194/acp-17-8269-2017
Research article
 | 
07 Jul 2017
Research article |  | 07 Jul 2017

Changes to the chemical state of the Northern Hemisphere atmosphere during the second half of the twentieth century

Mike J. Newland, Patricia Martinerie, Emmanuel Witrant, Detlev Helmig, David R. Worton, Chris Hogan, William T. Sturges, and Claire E. Reeves

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Mike Newland on behalf of the Authors (28 Feb 2017)  Author's response    Manuscript
ED: Reconsider after major revisions (20 Mar 2017) by Robert McLaren
AR by Mike Newland on behalf of the Authors (01 May 2017)  Author's response
ED: Publish subject to technical corrections (18 May 2017) by Robert McLaren
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Short summary
We report increasing levels of alkyl nitrates in the Northern Hemisphere atmosphere between 1960 and the mid-1990s. These increases are symptomatic of large-scale changes to the chemical composition of the atmosphere, particularly with regards to the amounts of short-lived, reactive species. The observed increases are likely driven by increasing levels of nitrogen oxides. These changes have direct implications for the lifetimes of climate-relevant species in the atmosphere, such as methane.
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