Articles | Volume 18, issue 2
https://doi.org/10.5194/acp-18-705-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-18-705-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Drivers for spatial, temporal and long-term trends in atmospheric ammonia and ammonium in the UK
CEH, Bush Estate, Penicuik, Midlothian EH26 0QB, UK
Christine F. Braban
CEH, Bush Estate, Penicuik, Midlothian EH26 0QB, UK
Ulrike Dragosits
CEH, Bush Estate, Penicuik, Midlothian EH26 0QB, UK
Anthony J. Dore
CEH, Bush Estate, Penicuik, Midlothian EH26 0QB, UK
Ivan Simmons
CEH, Bush Estate, Penicuik, Midlothian EH26 0QB, UK
Netty van Dijk
CEH, Bush Estate, Penicuik, Midlothian EH26 0QB, UK
Janet Poskitt
CEH, Lancaster Environment Centre, Bailrigg, Lancaster LA1 4AP, UK
Gloria Dos Santos Pereira
CEH, Lancaster Environment Centre, Bailrigg, Lancaster LA1 4AP, UK
Patrick O. Keenan
CEH, Lancaster Environment Centre, Bailrigg, Lancaster LA1 4AP, UK
Christopher Conolly
Ricardo Energy & Environment, Gemini Building, Fermi Avenue,
Harwell, Oxon OX11 0QR, UK
Keith Vincent
Ricardo Energy & Environment, Gemini Building, Fermi Avenue,
Harwell, Oxon OX11 0QR, UK
Rognvald I. Smith
CEH, Bush Estate, Penicuik, Midlothian EH26 0QB, UK
Mathew R. Heal
School of Chemistry, University of Edinburgh, David Brewster Road,
Edinburgh EH9 3FJ, UK
Mark A. Sutton
CEH, Bush Estate, Penicuik, Midlothian EH26 0QB, UK
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Latest update: 24 Dec 2024
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.
A unique long-term dataset of NH3 and NH4+ data from the NAMN is used to assess spatial,...
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