Zobrazeno 1 - 10
of 203
pro vyhledávání: '"Richard G. Derwent"'
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:
Richard G. Derwent
Publikováno v:
Atmosphere, Vol 11, Iss 5, p 486 (2020)
Estimates of the global warming potential (GWP) of methane rely on the predictions from global chemistry-transport models. These models employ many uncertain input parameters representing the sources and sinks for methane and those for the tropospher
Externí odkaz:
https://doaj.org/article/39f794b498a44bd2bb9a6e9f54442c7d
Autor:
Richard G. Derwent
Publikováno v:
Atmosphere, Vol 11, Iss 2, p 171 (2020)
This intercomparison has taken thirteen chemical mechanisms and compared how they treat VOC oxidation and degradation and its relationship to the photochemical formation of ozone and hydroxyl radicals. Here, we have looked in some detail at the incre
Externí odkaz:
https://doaj.org/article/1c1e64af3ba6470390c9130c6aae9f1f
Autor:
M. Anwar H. Khan, Billie-Louise Schlich, Michael E. Jenkin, Beth M. A. Shallcross, Katherine Moseley, Catherine Walker, William C. Morris, Richard G. Derwent, Carl J. Percival, Dudley E. Shallcross
Publikováno v:
Atmosphere, Vol 9, Iss 10, p 387 (2018)
A relationship between isoprene and 1,3-butadiene mixing ratios was established to separate the anthropogenic and biogenic fractions of the measured isoprene in London air in both urban background (Eltham) and urban traffic (Marylebone Road) areas ov
Externí odkaz:
https://doaj.org/article/80e0f1b18a19405da1e4e1083bda3a13
Autor:
Anwar H. Khan, Kieran Tait, Richard G. Derwent, Steve Roome, Asan Bacak, Steve Bullock, Mark H. Lowenberg, Dudley E. Shallcross
Publikováno v:
International Journal of Chemical Kinetics. 55:402-412
Autor:
Rayne Holland, Anwar H. Khan, Richard G. Derwent, Josie Lynch, Fahima Ahmed, Sophia Grace, Asan Bacak, Dudley E. Shallcross
Publikováno v:
International Journal of Chemical Kinetics. 55:350-364
Autor:
Richard G. Derwent
Publikováno v:
International Journal of Hydrogen Energy. 48:8328-8341
An international team of eminent atmospheric scientists have prepared Mechanisms of Atmospheric Oxidation of the Alkanes as an authoritative source of information on the role of alkanes in the chemistry of the atmosphere. The book includes the proper
Publikováno v:
Stevenson, D S, Derwent, R G, Wild, O & Collins, W J 2022, ' COVID-19 lockdown emission reductions have the potential to explain over half of the coincident increase in global atmospheric methane ', Atmospheric Chemistry and Physics, vol. 22, no. 21, pp. 14243-14252 . https://doi.org/10.5194/acp-22-14243-2022
Compared with 2019, measurements of the global growth rate of background (marine air) atmospheric methane rose by 5.3 ppb yr−1 in 2020, reaching 15.0 ppb yr−1. Global atmospheric chemistry models have previously shown that reductions in nitrogen
Publikováno v:
Atmospheric Chemistry and Physics. 22:13423-13430
A nonlinear change in baseline ozone concentrations at northern midlatitudes has been quantified over preceding decades. During the past few years, several studies, using linear trend analyses, report relatively small trends over selected time period