Table of Contents
ISRN Atmospheric Sciences
Volume 2013, Article ID 124965, 8 pages
Research Article

Solitary Rossby Waves in the Lower Tropical Troposphere

1Department of Physics, Faculty of Science, University of Douala, P.O. Box 24157, Douala, Cameroon
2Laboratory for Environmental Modelling and Atmospheric Physics, Department of Physics, University of Yaounde 1, Yaoundé, Cameroon

Received 27 February 2013; Accepted 8 May 2013

Academic Editors: L. Ahrens, M. N. Lorenzo, and R. Singh

Copyright © 2013 Andre Lenouo and Francois Kamga Nkankam. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Weakly nonlinear approximation is used to study the theoretical comportment of large-scale disturbances around the intertropical midtropospheric jet. We show here that the Korteweg de Vries (KdV) theory is appropriated to describe the structure of the streamlines around the African easterly jet (AEJ) region. The introduction of the additional velocity of the soliton C1 permits to search the stage where the configuration of the wave structures is going to emerge out of specified initial conditions and this is the direct and inverse cascade method. It was also shown that the configurations of disturbances can be influenced by this parameter so that we can look if the disturbances are in the control or not of their dispersive effects. This permits to explain the evolution of initial conditions of the Tropical Storm (TS) Debby over West Africa from 20 to 24 August 2006.