演講公告

演講主題：2D turbulence and typhoon dynamics
主講人：郭鴻基教授 (台大大氣系)
演講日期：96年11月29日(星期四)<br>下午2:30 – 3:30
演講地點：(光復校區)科學一館307室
摘要內容：
For many years, two-dimensional turbulence has been a paradigm for geophysical fluid dynamics. It is a striking fact that for any type of random initial state or external forcing, a two-dimensional fluid will rapidly organize itself into a system of coherent, interacting vortices swimming through a sea of passive filamentary structure produced from earlier vortex interactions. This discipline has also been instrumental in the development of single charge plasma physics, galaxy spiral, the Great Red spot, the ozone hole problem and the typhoon dynamics. A brief review of implication of 2D and 3D turbulence in atmospheric science will be given. The typhoon merger dynamics, the eyewall rotation, the successive formation of tropical vortices in the monsoon confluent region, the concentric eyewall formation dynamics and the eye-wall mixing and eyewall meso-vortices are discussed. The dynamics emphasized are the selective decay of two-dimensional turbulence and the typhoon asymmetric dynamics.

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