Time evolution of breeze circulation in alpine valleys
This project investigated the patterns of wind-borne pollutants over the Italian-Swiss Alps from the Po Valley. Experiments were conducted in the Campo dei Fiori area, releasing tracers from a cold prealpine lake towards the sunny, south-orientated slope of a mountain (about 800m high). Air samples were taken at ground level and at altitude, and it was found that the cold lake delayed the tracer plume and that the mountain created a strong channelling effect. The development and application of a time-dependent Eulerian model for this experiment is described and the computed and ground level tracer concentrations are compared. It is concluded that circulation of air masses under breeze wind conditions over a complex terrain can be simulated with sufficient accuracy, and the models are now being improved to include time-dependency.
Bibliographic Reference: Paper presented: 18th International Technical Meeting on Air Pollution Modelling and its Applications, Vancouver (CA), May 13-17, 1990
Availability: Available from (1) as Paper EN 35479 ORA
Record Number: 199011736 / Last updated on: 1994-12-02
Original language: en
Available languages: en