Zobrazeno 1 - 10
of 1 646
pro vyhledávání: '"Dudley E"'
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
Publikováno v:
Communications Chemistry, Vol 6, Iss 1, Pp 1-10 (2023)
Abstract Ozonolysis of isoprene is considered to be an important source of formic acid (HCOOH), but its underlying reaction mechanisms related to HCOOH formation are poorly understood. Here, we report the kinetic and product studies of the reaction b
Externí odkaz:
https://doaj.org/article/fbf87755c5b34cc7b883d5c488518518
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
Autor:
M. Anwar H. Khan, Joel Brierley, Kieran N. Tait, Steve Bullock, Dudley E. Shallcross, Mark H. Lowenberg
Publikováno v:
Atmosphere, Vol 13, Iss 10, p 1660 (2022)
A kerosene fuelled aircraft was modelled within a performance tool and fuel burn and the emissions of nitrogen oxides (NOx) and water vapour at different stages of flight throughout the mission were estimated. Adaptions were made to engine and aircra
Externí odkaz:
https://doaj.org/article/929dac2e29bf416487fe2ab36921f617
Autor:
Kieran N. Tait, Mohammad Anwar H. Khan, Steve Bullock, Mark H. Lowenberg, Dudley E. Shallcross
Publikováno v:
Aerospace, Vol 9, Iss 7, p 355 (2022)
Non-CO2 aircraft emissions are responsible for the majority of aviation’s climate impact, however their precise effect is largely dependent on the environmental conditions of the ambient air in which they are released. Investigating the principal c
Externí odkaz:
https://doaj.org/article/8bd9cd034e9940198deb9db24cd26e1c
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
Autor:
M. Anwar H. Khan, Sophia Bonifacio, Joanna Clowes, Amy Foulds, Rayne Holland, James C. Matthews, Carl J. Percival, Dudley E. Shallcross
Publikováno v:
Atmosphere, Vol 12, Iss 10, p 1289 (2021)
An accelerating global energy demand, paired with the harmful environmental effects of fossil fuels, has triggered the search for alternative, renewable energy sources. Biofuels are arguably a potential renewable energy source in the transportation i
Externí odkaz:
https://doaj.org/article/4d80d6e830ce40399fd228c26b8f6eba
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
Autor:
Florencia M. R. Diaz, M. Anwar H. Khan, Beth M. A. Shallcross, Esther D. G. Shallcross, Ulrich Vogt, Dudley E. Shallcross
Publikováno v:
Atmosphere, Vol 11, Iss 5, p 534 (2020)
Previous work regarding the behaviour of ozone surface concentrations over many years in the United Kingdom had predicted that the frequency and severity of ozone episodes would become less marked in the future as a response to environmental regulati
Externí odkaz:
https://doaj.org/article/64575de705d24bb0b818fbf8fc4e5bbd
Autor:
Rayne Holland, M. Anwar H. Khan, Rabi Chhantyal-Pun, Andrew J. Orr-Ewing, Carl J. Percival, Craig A. Taatjes, Dudley E. Shallcross
Publikováno v:
Atmosphere, Vol 11, Iss 4, p 407 (2020)
Perfluorooctanoic acid, PFOA, is one of the many concerning pollutants in our atmosphere; it is highly resistant to environmental degradation processes, which enables it to accumulate biologically. With direct routes of this chemical to the environme
Externí odkaz:
https://doaj.org/article/a429d1c36b694908add33150f1e2fa0a