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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Latest update: 25 Jul 2021
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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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