On plume meandering under stable stratification |
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| Institution: | 1. GéM, Ecole Centrale de Nantes, France;2. Université de Lyon, LaMCoS, INSA de Lyon, CNRS UMR 5259, France;3. LaMSID UMR EDF-CNRS-CEA 2832, EDF R&D, F-92141, Clamart Cedex, France;1. Technical University of Denmark, Nils Koppels Allé, 2800 Kgs. Lyngby, Denmark;2. DHI Water & Environment, Agern Allé 11, 2970 Hørsholm, Denmark;3. Energy, Environment and Water Research Centre of the Cyprus Institute, Cyprus;4. Enalia Physis Environmental Research Centre, Nicosia, Cyprus;1. School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia;2. School of Civil Engineering & Transportation, South China University of Technology, Guangzhou, Guangdong, 510640, China;3. Centre for Infrastructure Engineering, Western Sydney University, Penrith, NSW, 2751, Australia;4. UNSW Centre for Transformational Environmental Technologies, Yixing, Jiangsu, 214200, China |
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| Abstract: | Under stable stratification and light winds large horizontal wind direction fluctuations have been observed quite often leading to meandering of pollutants plume downwind of elevated point sources. Due to this plume meandering long term concentration levels can be reduced by a factor of 4 or more, compared to straight plume conditions. Some possible mechanisms causing plume meandering under stable conditions are discussed, including gravity waves and vortices with horizontal or vertical axis. |
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