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Browsing University of Hertfordshire by Author "Staquet, Chantal"
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Characterization of oscillatory motions in the stable atmosphere of a deep valley
Largeron, Yann; Staquet, Chantal; Chemel, C. (2013-09)In a valley sheltered from strong synoptic effects, the dynamics of the valley atmosphere at night is dominated by katabatic winds. In a stably stratified atmosphere, these winds undergo temporal oscillations, whose frequency ... -
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, ... -
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 ...