Long-period modelling of photochemical oxidants in Europe. Model calculations for July 1985

Simpson, David

doi:10.1016/0960-1686(92)90061-o

Cited by 127 publications

(54 citation statements)

References 28 publications

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“…This scheme has been extended and updated from an original continental boundary layer chemistry scheme (Hov, 1985). The hydrocarbon degradation scheme is very similar to the EMEP gas phase chemical mechanism (Simpson, 1992) and is a priori adapted as for biomass burning as well for industrial or traffic emissions. Six hydrocarbon species (ethane, butane, ethene, propene, isoprene and o-xylene) represent alkane, alkene, ketones and aromatic compounds.…”

Section: Model Descriptionmentioning

confidence: 99%

Ozone generation over the Indian Ocean during the South African biomass-burning period: case study of October 1992.

et al. 2002

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Abstract. In this study, we present an estimation of photochemical ozone production during free tropospheric transport between the African biomass burning area and Reunion Island (Indian Ocean) by means of trajectory-chemistry model calculations. Indeed, enhanced ozone concentrations (80-100 ppbv) between 5 and 8 km height over Reunion Island are encountered during September-October when African biomass burning is active. The measurements performed during flight 10 of the TRACE-A campaign (October 6, 1992) have been used to initialise the lagrangian trajectory-chemistry model and several chemical forward trajectories, which reach the area of Reunion Island some days later, are calculated. We show that the ozone burden already present in the middle and upper troposphere over Southern Africa, formed from biomass burning emissions, is further enhanced by photochemical production over the Indian Ocean at the rate of 2.5-3 ppbv/day. The paper presents sensitivity studies of how these photochemical ozone production rates depend on initial conditions. The rates are also compared to those obtained by other studies over the Atlantic Ocean. The importance of our results for the regional ozone budget over the Indian Ocean is briefly discussed.

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Section: Model Descriptionmentioning

confidence: 99%

Ozone generation over the Indian Ocean during the South African biomass-burning period: case study of October 1992.

et al. 2002

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“…The complete scheme, which is the original scheme of Lattuati (1997), hereafter called MEL-CHIOR1, describes more than 300 reactions of 80 gaseous species. The hydrocarbon degradation is derived from that of the EMEP gas-phase mechanism (Simpson, 1992), with modifications in particular for low NO x conditions and NO xnitrate chemistry. All rate constants are taken from Atkinson et al (1997) and De Moore et al (1994) …”

Section: Gas-phase Chemistrymentioning

confidence: 99%

CHIMERE 2013: a model for regional atmospheric composition modelling

et al. 2013

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Abstract. Tropospheric trace gas and aerosol pollutants have adverse effects on health, environment and climate. In order to quantify and mitigate such effects, a wide range of processes leading to the formation and transport of pollutants must be considered, understood and represented in numerical models. Regional scale pollution episodes result from the combination of several factors: high emissions (from anthropogenic or natural sources), stagnant meteorological conditions, kinetics and efficiency of the chemistry and the deposition. All these processes are highly variable in time and space, and their relative contribution to the pollutants budgets can be quantified with chemistry-transport models. The CHIMERE chemistry-transport model is dedicated to regional atmospheric pollution event studies. Since it has now reached a certain level a maturity, the new stable version, CHIMERE 2013, is described to provide a reference model paper. The successive developments of the model are reviewed on the basis of published investigations that are referenced in order to discuss the scientific choices and to provide an overview of the main results.

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“…The MELCHIOR (Modele Lagrangien de Chimie de l'Ozone a l'échelle Régionale; http://www.lmd.polytechnique.fr/ chimere/; Schmidt et al, 2001) chemical mechanism was originally developed from an earlier version of the EMEP chemistry model (Simpson, 1992;Vautard et al, 2001), with special attention to low NO x conditions and nighttime (NO 3 ) chemistry. The original extended version of the mechanism includes more than 300 chemical reactions of 80 gaseous species, whereas the reduced version (MELCHIOR2) treats 44 species and about 130 reactions.…”

Section: Melchior (Chimere)mentioning

confidence: 99%

A review of operational, regional-scale, chemical weather forecasting models in Europe

et al. 2012

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Abstract. Numerical models that combine weather forecasting and atmospheric chemistry are here referred to as chemical weather forecasting models. Eighteen operational chemical weather forecasting models on regional and continental scales in Europe are described and compared in this article. Topics discussed in this article include how weather forecasting and atmospheric chemistry models are integrated into chemical weather forecasting systems, how physical processes are incorporated into the models through parameterization schemes, how the model architecture affects the predicted variables, and how air chemistry and aerosol processes are formulated. In addition, we discuss sensitivity analysis and evaluation of the models, user operational requirements, such as model availability and documentation, and output availability and dissemination. In this manner, this article allows for the evaluation of the relative strengths and weaknesses of the various modelling systems and modelling approaches. Finally, this article highlights the most prominent gaps of knowledge for chemical weather forecasting models and suggests potential priorities for future research Published by Copernicus Publications on behalf of the European Geosciences Union. J. Kukkonen et al.: A review of operational, regional-scale, chemical weather forecasting models in Europedirections, for the following selected focus areas: emission inventories, the integration of numerical weather prediction and atmospheric chemical transport models, boundary conditions and nesting of models, data assimilation of the various chemical species, improved understanding and parameterization of physical processes, better evaluation of models against data and the construction of model ensembles.

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Long-period modelling of photochemical oxidants in Europe. Model calculations for July 1985

Cited by 127 publications

References 28 publications

Ozone generation over the Indian Ocean during the South African biomass-burning period: case study of October 1992.

Ozone generation over the Indian Ocean during the South African biomass-burning period: case study of October 1992.

CHIMERE 2013: a model for regional atmospheric composition modelling

A review of operational, regional-scale, chemical weather forecasting models in Europe

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