TY - JOUR
T1 - Analysis of UK and European NOx and VOC emission scenarios in the Defra model intercomparison exercise
AU - Derwent, Richard
AU - Beevers, Sean
AU - Chemel, C.
AU - Cooke, Sally
AU - Vazhappilly Francis, Xavier
AU - Fraser, Andrea
AU - Heal, Mathew R.
AU - Kitwiroon, Nutthida
AU - Lingard, Justin
AU - Redington, Alison
AU - Sokhi, Ranjeet
AU - Vieno, Massimo
N1 - This is a PDF file of an unedited manuscript that has been accepted for publication. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all
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PY - 2014/9
Y1 - 2014/9
N2 - Simple emission scenarios have been implemented in eight United Kingdom air quality models with the aim of assessing how these models compared when addressing whether photochemical ozone formation in southern England was NOx- or VOC-sensitive and whether ozone precursor sources in the UK or in the Rest of Europe (RoE) were the most important during July 2006. The suite of models included three Eulerian-grid models (three implementations of one of these models), a Lagrangian atmospheric dispersion model and two moving box air parcel models. The assignments as to NOx- or VOC-sensitive and to UK- versus RoE-dominant, turned out to be highly variable and often contradictory between the individual models. However, when the assignments were filtered by model performance on each day, many of the contradictions could be eliminated. Nevertheless, no one model was found to be the 'best' model on all days, indicating that no single air quality model could currently be relied upon to inform policymakers robustly in terms of NOx- versus VOC-sensitivity and UK- versus RoE-dominance on each day. It is important to maintain a diversity in model approaches.
AB - Simple emission scenarios have been implemented in eight United Kingdom air quality models with the aim of assessing how these models compared when addressing whether photochemical ozone formation in southern England was NOx- or VOC-sensitive and whether ozone precursor sources in the UK or in the Rest of Europe (RoE) were the most important during July 2006. The suite of models included three Eulerian-grid models (three implementations of one of these models), a Lagrangian atmospheric dispersion model and two moving box air parcel models. The assignments as to NOx- or VOC-sensitive and to UK- versus RoE-dominant, turned out to be highly variable and often contradictory between the individual models. However, when the assignments were filtered by model performance on each day, many of the contradictions could be eliminated. Nevertheless, no one model was found to be the 'best' model on all days, indicating that no single air quality model could currently be relied upon to inform policymakers robustly in terms of NOx- versus VOC-sensitivity and UK- versus RoE-dominance on each day. It is important to maintain a diversity in model approaches.
U2 - 10.1016/j.atmosenv.2014.05.036
DO - 10.1016/j.atmosenv.2014.05.036
M3 - Article
SN - 1352-2310
VL - 94
SP - 249
EP - 257
JO - Atmospheric Environment
JF - Atmospheric Environment
ER -