Articles | Volume 18, issue 2
Atmos. Chem. Phys., 18, 705–733, 2018
https://doi.org/10.5194/acp-18-705-2018
Atmos. Chem. Phys., 18, 705–733, 2018
https://doi.org/10.5194/acp-18-705-2018

Research article 22 Jan 2018

Research article | 22 Jan 2018

Drivers for spatial, temporal and long-term trends in atmospheric ammonia and ammonium in the UK

Yuk S. Tang et al.

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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 Christine Braban on behalf of the Authors (25 Sep 2017)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (27 Sep 2017) by Fangqun Yu
RR by Anonymous Referee #2 (07 Oct 2017)
RR by László Horváth (07 Oct 2017)
ED: Reconsider after major revisions (09 Oct 2017) by Fangqun Yu
AR by Christine Braban on behalf of the Authors (07 Nov 2017)  Author's response    Manuscript
ED: Publish as is (12 Nov 2017) by Fangqun Yu
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Short summary
A unique long-term dataset of NH3 and NH4+ data from the NAMN is used to assess spatial, seasonal and long-term variability across the UK. NH3 is spatially variable, with distinct temporal profiles according to source types. NH4+ is spatially smoother, with peak concentrations in spring from long-range transport. Decrease in NH3 is smaller than emissions, but NH4+ decreased faster than NH3, due to a shift from stable (NH4)2SO4 to semi-volatile NH4NO3, increasing the atmospheric lifetime of NH3.
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