[Eoas-seminar] EOAS colloquium, Friday, Jan. 12 @ 3:00 PM,

[eoas-seminar at lists.fsu.edu]

Dear colleague,

Here is the announcement of this week's EOAS colloquium:

Time: Friday, Jan. 12 @ 3:00 PM

Location: EOAS 1050 (regular EOAS colloquium room)

Speaker: Zhaohua Wu, EOAS, Florida State University

Title: Waves in a spatially varying mean flow

Abstract: Mechanical waves are propagating dynamic disturbances that redistribute energy or other physical quantities in the spatial domain. How waves propagate in a medium has been one of the most studied topics in all fields of natural sciences. Yet many fundamental questions regarding wave propagation in a complicated and varying medium remain to be understood. In this talk, the speaker will introduce his study in the past decade on the propagation of tropical atmospheric waves in a varying mean flow, seeking to explain why the observed tropical atmospheric waves should behave as they are. The focal point is placed on how wave amplitude changes in a varying mean flow as it propagates away from its original location. By formulating waves in a general form independent of wave systems, an equation of the spatiotemporal change of wave amplitude that only involves medium characteristics is derived, which is a more physically intuitive and understandable form of the wave action equation proposed in the 1960s. This study of waves also involves a methodology shift used in diagnosing waves: from Fourier transform-based global wave formulation to novel localized wave formulation.

A Zoom link to the talk is available only by request.

Cheers,

Zhaohua





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