Influence of the interactions of local dynamical processes with large-scale flow on air quality in the grenoble area
Résumé
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.
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