January 26, 2015: FB1-Seminar

11:00 h, Lecture Hall, Düsternbrooker Weg 20

Abstract:

For diagnosing the effect of stationary Rossby waves on atmospheric circulation, a phase-independent expression for pseudomomentum flux has been developed by Takaya and Nakamura (2001) using quasi-geostrophic equations. On the other hand, concerning inertia-gravity waves, no previous studies have derived a phase-expression for wave-activity flux nor pseudomomentum flux. Recently we have developed a phase-independent expression for both energy flux and pseudomomentum flux associated with inertial-gravity waves. In order to illustrate the utility of the new expression, we have performed a set of high-resolution simulations for internal waves in the ocean, such as inertia-gravity waves generated by a moving storm and mountain waves generated by a mean flow over a bottom ridge. The new expression for the energy flux may be used to reduce a noise associated with sampling errors in a model output, while the new expression for the pseudomomentum flux may be used for the diagnosis of stationary mountain waves.

List of scheduled FB1 seminars