BUBBLE – an Urban Boundary Layer Meteorology Project |
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| Authors: | M W Rotach R Vogt C Bernhofer E Batchvarova A Christen A Clappier B Feddersen S-E Gryning G Martucci H Mayer V Mitev T R Oke E Parlow H Richner M Roth Y-A Roulet D Ruffieux J A Salmond M Schatzmann J A Voogt |
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| Institution: | (1) Swiss Federal Institute of Technology, Atmospheric and Climate Science, IAC-ETH, Zurich, Switzerland;(2) University of Basel, Institute for Meteorology, Climatology and Remote Sensing, Basel, Switzerland;(3) University of Dresden, Germany;(4) Bulgarian National Institute of Meteorology and Hydrology, Bulgaria;(5) Swiss Federal Institute of Technology, Laboratory of Air and Soil Pollution, LPAS-EPFL, Switzerland;(6) Meteorology Department, University of Hamburg, Germany;(7) Department for Wind Energy, Risø National Laboratory, Denmark;(8) University of Freiburg, Meteorological Institute, Germany;(9) Observatory of Neuchatel, Switzerland;(10) Geography Department, The University of British Columbia, Canada;(11) Geography Department, The National University of Singapore, Singapore;(12) Swiss Federal Office of Meteorology and Climatology, MeteoSwiss, Switzerland;(13) Geography Department, Birmingham University, England;(14) Geography Department, University of Western Ontario, Canada |
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| Abstract: | Summary The Basel UrBan Boundary Layer Experiment (BUBBLE) was a year-long experimental effort to investigate in detail the boundary layer structure in the City of Basel, Switzerland. At several sites over different surface types (urban, sub-urban and rural reference) towers up to at least twice the main obstacle height provided turbulence observations at many levels. In addition, a Wind Profiler and a Lidar near the city center were profiling the entire lower troposphere. During an intensive observation period (IOP) of one month duration, several sub-studies on street canyon energetics and satellite ground truth, as well as on urban turbulence and profiling (sodar, RASS, tethered balloon) were performed. Also tracer experiments with near-roof-level release and sampling were performed. In parallel to the experimental activities within BUBBLE, a meso-scale numerical atmospheric model, which contains a surface exchange parameterization, especially designed for urban areas was evaluated and further developed. Finally, the area of the full-scale tracer experiment which also contains several sites of other special projects during the IOP (street canyon energetics, satellite ground truth) is modeled using a very detailed physical scale-model in a wind tunnel. In the present paper details of all these activities are presented together with first results. |
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