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New Laboratory Experiments to Study the Large-Scale Circulation and Climate Dynamics

  • The large-scale flows of the oceans and the atmosphere are driven by a non-uniform surface heating over latitude, and rotation. For many years scientists try to understand these flows by doing laboratory experiments. In the present paper we discuss two rather new laboratory experiments designed to study certain aspects of the atmospheric circulation. One of the experiments, the differentially heated rotating annulus at the Brandenburg University of Technology (BTU) Cottbus, has a cooled inner cylinder and a heated outer wall. However, the structure of the atmospheric meridional circulation motivates a variation of this “classical” design. In the second experiment described, operational at the Institute of Continuous Media Mechanics (ICMM) in Perm, heating and cooling is performed at different vertical levels that resembles more the atmospheric situation. Recent results of both experiments are presented and discussed. Differences and consistencies are highlighted. Though many issues are still open we conclude that both setups haveThe large-scale flows of the oceans and the atmosphere are driven by a non-uniform surface heating over latitude, and rotation. For many years scientists try to understand these flows by doing laboratory experiments. In the present paper we discuss two rather new laboratory experiments designed to study certain aspects of the atmospheric circulation. One of the experiments, the differentially heated rotating annulus at the Brandenburg University of Technology (BTU) Cottbus, has a cooled inner cylinder and a heated outer wall. However, the structure of the atmospheric meridional circulation motivates a variation of this “classical” design. In the second experiment described, operational at the Institute of Continuous Media Mechanics (ICMM) in Perm, heating and cooling is performed at different vertical levels that resembles more the atmospheric situation. Recent results of both experiments are presented and discussed. Differences and consistencies are highlighted. Though many issues are still open we conclude that both setups have their merits. The variation with heating and cooling at different levels might be more suited to study processes in the transition zone between pure rotating convection and the zone of westerly winds. On the other hand, the simpler boundary conditions of the BTU experiment make this experiment easier to control.show moreshow less

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Author: Uwe HarlanderORCiD, Andrei Sukhanovskii, Stéphane Abide, Ion-Dan Borcia, Elene Popova, Costanza Rodda, Andrei Vasiliev, Miklos Vincze
URL:https://www.mdpi.com/2073-4433/14/5/836
DOI:https://doi.org/10.3390/atmos14050836
Title of the source (English):Atmosphere
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2023
Volume/Year:14
Issue number:5
Number of pages:19
Article number:836
Faculty/Chair:Fakultät 3 Maschinenbau, Elektro- und Energiesysteme / FG Aerodynamik und Strömungslehre
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