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Development and application of a Lagrangian model to determine the origins of ozone episodes in the UK

Strong, Jonathan and Whyatt, Duncan and Hewitt, C. N. and Derwent, R. G. (2010) Development and application of a Lagrangian model to determine the origins of ozone episodes in the UK. Atmospheric Environment, 44 (5). pp. 631-641. ISSN 1352-2310

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Abstract

This paper describes the further development and application of the Edinburgh-Lancaster Model for Ozone (ELMO). We replace straight-line back-trajectories with trajectories and associated meteorology supplied by the US National Oceanic and Atmospheric Administration Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) service to allow more realistic modelling of specific UK ozone episodes. We call this ELMO-2. Model performance is rigorously tested against observed ozone concentrations for two episodes recorded across 14 rural UK monitoring stations during the spring and summer of 1995. For both episodes, the afternoon concentrations (usually coinciding with the daily maxima) are captured well by the model and the diurnal ozone cycle is reproduced, although the amplitude in concentrations is generally smaller than the observed. The summer episode is investigated further through indicator species analysis and source attribution, and found to be mainly VOC-limited. European emissions account for the majority of ozone production. We demonstrate how improved modelling leads to better understanding of regional and local ozone production across the UK under episodic conditions. (C) 2009 Elsevier Ltd. All rights reserved.

Item Type: Article
Journal or Publication Title: Atmospheric Environment
Uncontrolled Keywords: ELMO ; HYSPLIT ; Source attribution ; Episode sensitivity ; ATMOSPHERIC CHEMISTRY ; DRY DEPOSITION ; SURFACE OZONE ; QUALITY ; EUROPE ; HYDROCARBONS ; SUMMER ; SCALE ; TRAJECTORIES ; STRATEGIES
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 31623
Deposited By: Dr Duncan Whyatt
Deposited On: 29 Jan 2010 15:32
Refereed?: Yes
Published?: Published
Last Modified: 06 Sep 2013 19:56
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/31623

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