Model chemical transport

Jaffe, D. A., T. K. Berntsen, and I. S. A. Isaksen, A Global Three-Dimensional Chemical Transport Model. 2. Nitrogen Oxides and Nonmethane Hydrocarbon Results, J. Geophys. Res., 102, 21281-21296(1997). 

Brasseur, G. P., F. Lefevre, and A. K. Smith, Chemical-Transport Models of the Atmosphere, in Perspectives in Environmental Chemistry (D. L. Macalady, Ed.), pp. 369-399, Oxford Univ. Press, New York, 1998. 

Bemtsen, T., and I.S.A. Isaksen, 1997 A global three-dimensional chemical transport model for the troposphere 1. Model description and CO and ozone results, J. Geophys. Res., 102,21,239-21,280. 

Muller, J.-F., and G. Brasseur, 1995 IMAGES A three-dimensional chemical transport model of the global troposphere, JGR, 100,16,445-16,490. 

Abstract. The impact of future aircraft emissions on concentrations of reactive nitrogen, water vapour and ozone has been calculated using the 3-dimensional stratospheric chemical transport model SCTM-1. Emissions of NOx (N0+N02) and H20 from both sub- and supersonic aircraft have been considered. 

SCTM-1 is an off-line stratospheric CTM (chemical transport model) extending from the surface up to 90 km. The resolution is 7.8 x 10 degrees in 29 layers, with 1.5 km vertical resolution in the tropopause region. 

The results presented here focus on the present and future effect on radiative forcing due to changes in the radiatively-important chemical species (03, water vapor and CHJ associated with aircraft emissions. To address this question, we conduct uncoupled model experiments using the University of Oslo (UiO) 3-D chemical transport models (CTMs) to calculate changes in atmospheric composition and the State University of New York at Albany (SUNYA) 3-D global climate model (GCM) to calculate the radiative forcing associated with these changes. Two case studies were conducted to... 

The chemical processes involved in depletion of lower stratospheric ozone are now fairly well understood [8]. However, 3-dimensional chemical transport models still under-predict ozone loss in the Arctic, where the winterly polar vortex is less stable compared to its Antarctic counterpart, temperatures in the lower... 

For the situation of February 28, 1996 the chemical transport model calculates low CIO mixing ratios inside the vortex at about 20 km corresponding to a deactivation of chlorine into the reservoir species CIONO2 (M. Chipperfield, personal communication), which is in contrast to the ASUR measurement showing clearly a large CIO volume mixing ratio peak of 1.7 0.25 ppbv in the lower stratosphere of the Arctic vortex. 

The analysis of the datasets described above has shown that an unambiguous identification of critical areas allowing for generalisation would require further more sophisticated tools such as extensive air quality modelling with chemical transport models and improved comparable datasets. 

Keywords Back-trajectories, Chemical composition, Chemical transport models, Hot-spots, Lenschow, PM10, PMF, Urban air... 

Keywords Anthropogenic contribution, Chemical composition, Chemical transport modelling, Natural contribution, North-western Europe, PM10, Source apportionment, Spain... 

During the last two decades or so several chemistry-transport models have been developed in Europe and elsewhere. They are already widely applied for PM exposure and health-related issues, at local, urban and regional scales, but an effort is still needed to take more advantage of this third generation models (Chemical Transport Models including aerosol chemistry) on epidemiological studies. 

A. Baklanov et al. (eds.). Integrated Systems of Meso-Meteorological and Chemical Transport Models, DOI 10.1007/978-3-642-13980-2 l, Springer-Verlag Berlin Heidelberg 2011... 

The on-line integration of meso-scale meteorological models and atmospheric aerosol and chemical transport models enables the utilization of all meteorological 3D fields in ACTMs at each time step and the consideration of the feedbacks of air pollution (e.g. urban aerosols) on meteorological processes and climate forcing. 

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