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Browsing by Author "Arduini, Gabriele"
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Dispersion of tracers in the stable atmosphere of a valley opening onto a plain
Quimbayo-Duarte, Julian; Staquet, Chantal; Chemel, Charles; Arduini, Gabriele (2019-08-01)We quantify the impact of a valley-wind system on the transport of passive tracers in the stably-stratified atmosphere of a valley dynamically decoupled from the atmosphere above. The simple configuration of an idealized ... -
Drivers of severe air pollution events in a deep valley during wintertime: a case study from the Arve river valley, France
Quimbayo-Duarte, Julian; Chemel, Charles; Staquet, Chantal; Troude, Florence; Arduini, Gabriele (2021-02-15)The Arve river valley airshed in the French Alps experiences particularly severe air pollution during wintertime stable atmospheric conditions associated with persistent cold-air pools. PM10 data recorded in the region ... -
Impact of along-valley orographic variations on the dispersion of passive tracers in a stable atmosphere
Quimbayo-Duarte, Julian; Staquet, Chantal; Chemel, Charles; Arduini, Gabriele (2019-04-25)A numerical model is used to investigate the transport of passive tracers in an idealized Alpine valley during stable wintertime conditions after the evening transition. The valley is composed of an upstream-valley section, ... -
Interactions between the night time valley-wind system and a developing cold-air pool
Arduini, Gabriele; Staquet, C.; Chemel, Charles (2016-10-01)The Weather Research and Forecast (WRF) numerical model is used to characterize the influence of a thermally-driven down-valley flow on a developing cold-air pool in an idealized alpine valley decoupled from the atmosphere ... -
Valley heat deficit as a bulk measure of wintertime particulate air pollution in the Arve River Valley
Chemel, C.; Arduini, Gabriele; Staquet, Chantal; Largeron, Yann; Legain, Dominique; Tzanos, Diane; Paci, Alexandre (2016-03)Urbanized valleys are particularly vulnerable to particulate air pollution during the winter, when ground-based stable layers or cold-air pools persist over the valley floor. We examine whether the temporal variability of ... -
Wintertime Stable Boundary-Layer Processes in Alpine Valleys
Arduini, Gabriele (2018-02-01)Alpine valleys are rarely closed systems, implying that the atmospheric boundary layer of a particular valley section is influenced by the surrounding terrain and large-scale flows. A detailed characterisation and ...