Investigating the Effect of Fine Particulate Matter (PM2.5) Emission Reduction on Surface-Level Ozone (O3) during Summer across the UK

Autor: Lydia Curley, Rayne Holland, M. Anwar H. Khan, Dudley E. Shallcross

Publikováno v: Atmosphere, Vol 15, Iss 6, p 733 (2024)

UK air pollutant data collected over a 10-year period (2010–2019) from 46 sites with Urban Traffic, Urban Background, Suburban Background, Rural Background, and Urban Industrial environmental types were analysed to study the relationships between [

Externí odkaz: https://doaj.org/article/1ae1086daeef463fae3a882714da2531

Elucidating the Effects of COVID-19 Lockdowns in the UK on the O3-NOx-VOC Relationship

Autor: Rayne Holland, Katya Seifert, Eric Saboya, M. Anwar H. Khan, Richard G. Derwent, Dudley E. Shallcross

Publikováno v: Atmosphere, Vol 15, Iss 5, p 607 (2024)

The unprecedented reductions in anthropogenic emissions over the COVID-19 lockdowns were utilised to investigate the response of ozone (O3) concentrations to changes in its precursors across various UK sites. Ozone, volatile organic compounds (VOCs)

Externí odkaz: https://doaj.org/article/aca273be164348b19c672be0ad2416f6

The reaction of hydroxyl and methylperoxy radicals is not a major source of atmospheric methanol

Autor: Rebecca L. Caravan, M. Anwar H. Khan, Judit Zádor, Leonid Sheps, Ivan O. Antonov, Brandon Rotavera, Krupa Ramasesha, Kendrew Au, Ming-Wei Chen, Daniel Rösch, David L. Osborn, Christa Fittschen, Coralie Schoemaecker, Marius Duncianu, Asma Grira, Sebastien Dusanter, Alexandre Tomas, Carl J. Percival, Dudley E. Shallcross, Craig A. Taatjes

Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-9 (2018)

The reaction of hydroxyl and methylperoxy radicals has recently been suggested as the source of missing methanol in the remote troposphere. Here, the authors present direct experimental measurements demonstrating the reaction leads to further underpr

Externí odkaz: https://doaj.org/article/60d11ecd7e2b4310bd5443260780c27c

Abundance of NO3 Derived Organo-Nitrates and Their Importance in the Atmosphere

Autor: Amy Foulds, M. Anwar H. Khan, Thomas J. Bannan, Carl J. Percival, Mark H. Lowenberg, Dudley E. Shallcross

Publikováno v: Atmosphere, Vol 12, Iss 11, p 1381 (2021)

The chemistry of the nitrate radical and its contribution to organo-nitrate formation in the troposphere has been investigated using a mesoscale 3-D chemistry and transport model, WRF-Chem-CRI. The model-measurement comparisons of NO2, ozone and nigh

Externí odkaz: https://doaj.org/article/a6ff8576f5974affb2a29aa440cf732a

Acyclic halogenated monoterpenes from marine macroalgae: Estimated atmospheric lifetimes, potential degradation products, and their atmospheric impacts

Autor: M. Anwar H. Khan, Dudley E. Shallcross, Tim G. Harrison, Alastair M. Booth, Asan Bacak, Carl J. Percival, Denzil R. Beukes, Michael T. Davies-Coleman

Publikováno v: Khan, M A H, Shallcross, D E, Harrison, T G, Booth, A M, Bacak, A, Percival, C J, Beukes, D R & Davies-Coleman, M T 2022, ' Acyclic halogenated monoterpenes from marine macroalgae : Estimated atmospheric lifetimes, potential degradation products, and their atmospheric impacts ', Transactions of the Royal Society of South Africa, vol. 77, no. 1, pp. 73-88 . https://doi.org/10.1080/0035919X.2022.2036264

The selected acyclic halogenated monoterpenes derived from red macroalgae are investigated in terms of their isolation, their reactions with oxidants (ozone, OH radical) and the impacts of the first-generation oxidation products on the atmosphere. Th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::204de7455b8f41fb7541756e29c32914
https://doi.org/10.1080/0035919x.2022.2036264