Articles | Volume 17, issue 13
Atmos. Chem. Phys., 17, 8269–8283, 2017
https://doi.org/10.5194/acp-17-8269-2017
Atmos. Chem. Phys., 17, 8269–8283, 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 et al.

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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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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