| Autor: |
Hanane Bounouas, Pierre Roupsard, Eric Dupont, Yannick Lefranc, Aurélien Faucheux, Didier Hebert, Olivier Connan, Philippe Languionie, Yelva Roustan |
| Rok vydání: |
2023 |
| Popis: |
Impact studies of industrial sites for air pollutant emissions must consider all representative meteorological conditions. For low wind conditions, the impact evaluations present large uncertainties. Dispersion mechanisms and turbulence properties in these situations are modified and favor the stagnation of emitted pollutants in the atmosphere. The improvement of the understanding and modeling of these situations is hampered by a lack of data at the international level, particularly for the built environment.The objectives of this study are to present and analyze experimental data of dispersion of a tracer gas (Helium) under low winds in urban environment, as well as analyze the meteorological conditions corresponding to these situations to characterize the processes dominating the dispersion (especially meandering).Two measurement campaigns were realized in 2020 and 2022 respectively on the SIRTA (Site Instrumental de Recherche par Télédétection Atmosphérique). This built area is located near Paris in a peri-urban environment. The height of the buildings varies between 5 and 30 m. Helium concentrations are measured using air samples and mass spectrometers in real time, in the near field of the emission point ( |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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