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The Plumb-McEwan experiment serves as a laboratory analog for studying the Quasi-Biennial Oscillation (QBO), which governs the east-west wind patterns in the equatorial lower stratosphere. This unique experiment utilizes a stratified, non-rotating annulus where flow is influenced solely by fluctuations at upper or lower boundaries. These fluctuations are organized through gravity-wave propagation mechanisms. By flipping the apparatus upside down, the experiments can be conducted more easily. Discover more about this significant research at Kyoto University and its implications for atmospheric science.
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The Plumb-McEwan experiment: This is a laboratory counterpart of the QBO (the quasi-biennial oscillation of the east-west winds in the equatorial lower stratosphere). • The flow in a stratified, non-rotating annulus is driven away from solid rotation (anti-friction again) by nothing but the imposition of fluctuations at an upper or lower boundary. These are organized by the gravity-wave propagation mechanism:
This is the Kyoto University version of the Plumb-McEwan experiment: www.gfd-dennou.org/library/gfd_exp/ or websearch QBO “Tech Tips”
