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http://dx.doi.org/10.5467/JKESS.2012.33.6.544

Development of an Experimental Method for Understanding the Effects of the Coriolis Force on the Typhoon Genesis and its Movement  

Wie, Jieun (Devision of Science Education/Institute of Science Education, Chonbuk National University)
Jang, Swunghwan (Devision of Science Education/Institute of Science Education, Chonbuk National University)
Moon, Byungkwon (Devision of Science Education/Institute of Science Education, Chonbuk National University)
Publication Information
Journal of the Korean earth science society / v.33, no.6, 2012 , pp. 544-553 More about this Journal
Abstract
A simple experimental method was developed to help students understand the effect of the Coriolis force on typhoon genesis and movement. It consists of rotating tanks with and without a sloping bottom, and a small stirrer to produce cyclonic typhoon-like vortices by locally stirring the water. Vortices were able to last for more than 3 minutes without dissipation in the rotating tank. However, vortices were hardly maintained without rotation, and would rather disappear as soon as the stirrer stopped mixing. Since the dynamical properties of the rotating water are similar to those of the atmosphere influenced by the Coriolis force, the experiments show that the Coriolis force is indispensable to the typhoon genesis. When the tank had both the sloping bottom and rotation, vortices would move in a particular direction. Considering the topographical beta effect, this result indicates that typhoons are drifted not only by the steering wind but also by the meridional gradient of the Coriolis force. The methodology developed in this study, would be useful for both students and teachers to better the relationship between the Coriolis force and the typhoon genesis.
Keywords
rotating disk; vortex; Coriolis force; beta effect; typhoon;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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