Search Results - "Derwent, G."

COVID-19 lockdown emission reductions have the potential to explain over half of the coincident increase in global atmospheric methane by Stevenson, David S, Derwent, Richard G, Wild, Oliver, Collins, William J

“…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…”
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Opinion: Establishing a science-into-policy process for tropospheric ozone assessment by Derwent, Richard G, Parrish, David D, Faloona, Ian C

“…Elevated tropospheric ozone concentrations driven by anthropogenic precursor emissions are an environmental hazard scientifically similar to the depletion of…”
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Technical note: Northern midlatitude baseline ozone – long-term changes and the COVID-19 impact by Parrish, David D, Derwent, Richard G, Faloona, Ian C, Mims, Charles A

“…A nonlinear change in baseline ozone concentrations at northern midlatitudes has been quantified over preceding decades. During the past few years, several…”
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Investigations on the Anthropogenic Reversal of the Natural Ozone Gradient Between Northern and Southern Midlatitudes by Parrish, David D, Derwent, Richard G, Turnock, Steven T, O'Connor, Fiona M, Staehelin, Johannes, Bauer, Susanne E, Deushi, Makoto, Oshima, Naga, Tsigaridis, Kostas, Wu, Tongwen, Zhang, Jie

“…Our quantitative understanding of natural tropospheric ozone concentrations is limited by the paucity of reliable measurements before the 1980s. We utilize the…”
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Representing Organic Compound Oxidation in Chemical Mechanisms for Policy-Relevant Air Quality Models under Background Troposphere Conditions by Derwent, Richard G.

“…This intercomparison has taken thirteen chemical mechanisms and compared how they treat VOC oxidation and degradation and its relationship to the photochemical…”
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Secondary organic aerosol formation from a large number of reactive man-made organic compounds by Derwent, Richard G., Jenkin, Michael E., Utembe, Steven R., Shallcross, Dudley E., Murrells, Tim P., Passant, Neil R.

“…A photochemical trajectory model has been used to examine the relative propensities of a wide variety of volatile organic compounds (VOCs) emitted by human…”
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Tropospheric ozone production regions and the intercontinental origins of surface ozone over Europe by Derwent, Richard G., Utembe, Steven R., Jenkin, Michael E., Shallcross, Dudley E.

“…Ozone tagged labelling schemes have been implemented in a global Lagrangian chemistry-transport model to identify the intercontinental origins of surface ozone…”
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Global Warming Potential (GWP) for Methane: Monte Carlo Analysis of the Uncertainties in Global Tropospheric Model Predictions by Derwent, Richard G.

“…Estimates of the global warming potential (GWP) of methane rely on the predictions from global chemistry-transport models. These models employ many uncertain…”
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Estimating UK methane and nitrous oxide emissions from 1990 to 2007 using an inversion modeling approach by Manning, A. J., O'Doherty, S., Jones, A. R., Simmonds, P. G., Derwent, R. G.

“…Methane (CH4) and nitrous oxide (N2O) have strong radiative properties in the Earth's atmosphere and both are regulated through the United Nations Framework…”
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Historical Reconstruction of Mercury Pollution Across the Tibetan Plateau Using Lake Sediments by Yang, Handong, Battarbee, Richard W, Turner, Simon D, Rose, Neil L, Derwent, Richard G, Wu, Guangjian, Yang, Ruiqiang

“…The Tibetan Plateau is described as the “Roof of the World” averaging over 4000 m above sea level; it is remote, isolated, and presumed to be a pristine…”
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Flexible approach for quantifying average long-term changes and seasonal cycles of tropospheric trace species by Parrish, David D., Derwent, Richard G., O'Doherty, Simon, Simmonds, Peter G.

“…We present an approach for deriving a systematic mathematical representation of the statistically significant features of the average long-term changes and…”
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Protocol for the development of the Master Chemical Mechanism, MCM v3 (Part A): tropospheric degradation of non-aromatic volatile organic compounds by Saunders, S. M., Jenkin, M. E., Derwent, R. G., Pilling, M. J.

“…Kinetic and mechanistic data relevant to the tropospheric degradation of volatile organic compounds (VOC), and the production of secondary pollutants, have…”
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Gas‐phase kinetics, POCPs, and an investigation of the contributions of VOCs to urban ozone production in the UK by Holland, Rayne, Khan, Anwar H., Derwent, Richard G., Lynch, Josie, Ahmed, Fahima, Grace, Sophia, Bacak, Asan, Shallcross, Dudley E.

“…Ambient concentrations of 22 volatile organic compounds (VOCs) measured at London Marylebone Road (LMR), an urban traffic site, and London Eltham (LE), an…”
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Interhemispheric differences in seasonal cycles of tropospheric ozone in the marine boundary layer: Observation‐model comparisons by Derwent, Richard G., Parrish, David D., Galbally, Ian E., Stevenson, David S., Doherty, Ruth M., Young, Paul J., Shallcross, Dudley E.

“…Marine boundary layer ozone seasonal cycles have been quantified by fitting the sum of two sine curves through monthly detrended observations taken at three…”
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Greenhouse gas measurements from a UK network of tall towers: technical description and first results by Stanley, Kieran M, Grant, Aoife, O'Doherty, Simon, Young, Dickon, Manning, Alistair J, Stavert, Ann R, Spain, T Gerard, Salameh, Peter K, Harth, Christina M, Simmonds, Peter G, Sturges, William T, Oram, David E, Derwent, Richard G

“…A network of three tall tower measurement stations was set up in 2012 across the United Kingdom to expand measurements made at the long-term background…”
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Elucidating the Effects of COVID-19 Lockdowns in the UK on the O3-NOx-VOC Relationship by Holland, Rayne, Seifert, Katya, Saboya, Eric, Khan, M. Anwar H., Derwent, Richard G., Shallcross, Dudley E.

“…The unprecedented reductions in anthropogenic emissions over the COVID-19 lockdowns were utilised to investigate the response of ozone (O3) concentrations to…”
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A global analysis of acidification and eutrophication of terrestrial ecosystems by BOUWMAN, A. F, VAN VUUREN, D. P, DERWENT, R. G, POSCH, M

“…This paper presents an explorative, quantitative analysis of acidification and eutrophication of natural terrestrial ecosystems caused by excess sulfur (S) and…”
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Does the location of aircraft nitrogen oxide emissions affect their climate impact? by Stevenson, David S., Derwent, Richard G.

“…We present results from 112 one‐year global chemistry‐transport model integrations: a base case, then variants with extra aircraft nitrogen oxide (NOx)…”
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Impacts of climate change on surface ozone and intercontinental ozone pollution: A multi-model study by Doherty, R. M., Wild, O., Shindell, D. T., Zeng, G., MacKenzie, I. A., Collins, W. J., Fiore, A. M., Stevenson, D. S., Dentener, F. J., Schultz, M. G., Hess, P., Derwent, R. G., Keating, T. J.

“…The impact of climate change between 2000 and 2095 SRES A2 climates on surface ozone (O)3 and on O3 source-receptor (S-R) relationships is quantified using…”
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Zonal Similarity of Long‐Term Changes and Seasonal Cycles of Baseline Ozone at Northern Midlatitudes by Parrish, David D., Derwent, Richard G., Steinbrecht, Wolfgang, Stübi, René, Van Malderen, Roeland, Steinbacher, Martin, Trickl, Thomas, Ries, Ludwig, Xu, Xiaobin

“…The lifetime of ozone in the troposphere is approximately 3 weeks. Prevailing westerly winds at northern midlatitudes can transport air around the globe in…”
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