Effects of equatorially-confined shear flow on MRG and Rossby waves

Chaotic transport by Rossby waves in shear flow

Transport and mixing properties of Rossby waves in shear flow are studied using tools from Hamiltonian chaos theory. The destruction of barriers to transport is studied analytically, by using the resonance overlap criterion and the concept of separatrix reconnection, and numerically by using PoincarC sections. Attention is restricted to the case of symmetric velocity profiles with a single maxi...

ENSO related variation of equatorial MRG and Rossby waves and forcing from higher latitudes

The Algebraic Decay of Equatorial Rossby Waves in a Shear Flow

Boyd, J.P. and Christidis, Z.D., 1987. The algebraic decay of equatorial Rossby waves in a shear flow. Dyn. Atmos. Oceans, 11: 139-151. Through numerical integration, we show that equatorial Rossby waves, like their midlatitude counterparts, decay algebraically in the limit t --, co in a linear shear flow. For small times, the growth expected for some components does not translate into any grow...

Propagation of Rossby Waves in Stratified Shear Flows

A study is made of the propagation of Rossby waves in a stably stratified shear flows. The wave equation for the Rossby waves is derived in an isothermal atmosphere on a beta plane in the presence of a latitudinally sheared zonal flow. It is shown that the wave equation is singular at five critical levels, but the wave absorption takes place only at the two levels where the local relative frequ...

the effects of planning on accuracy and complexity of iranian efl students’ written narrative task performance

this study compared the different effects of form-focused guided planning vs. meaning-focused guided planning on iranian pre-intermediate students’ task performance. the study lasted for three weeks and concentrated on eight english structures. forty five pre-intermediate iranian students were randomly assigned to three groups of guided planning focus-on-form group (gpfg), guided planning focus...