Original scientific paper

INFLUENCE OF THE INTERACTIONS OF LOCAL DYNAMICAL PROCESSES WITH LARGE-SCALE FLOW ON AIR QUALITY IN THE GRENOBLE AREA

C. Chemel ; LEGI, J. Fourier University - CNRS - INP Grenoble, BP 53, 38041 Grenoble Cedex 9, France
E. Chaxel ; LEGI, J. Fourier University - CNRS - INP Grenoble, BP 53, 38041 Grenoble Cedex 9, France
O. Couach ; LPAS, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
J.P. Chollet ; LEGI, J. Fourier University - CNRS - INP Grenoble, BP 53, 38041 Grenoble Cedex 9, France

Abstract

The vertical distribution of ozone over the Grenoble area is investigated for two summer smog episodes in 1999 and 2003. The effects of the interactions of local dynamical processes with large-scale circulations were estimated using numerical modelling. The results suggest that a terrain-induced shear layer above the boundary layer confines pollutants within the valley. Vertical exchanges through this shear layer have a considerable influence on the near-surface ozone concentration from day to day.

Keywords

Complex terrain; Large scale – local scale interactions; Ozone residual layer; Summer smog

Hrčak ID:

64518

URI

https://hrcak.srce.hr/64518

Publication date:

15.12.2005.

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