Abstract
p>Utilising wind data for the significant levels: 2 000 feet, 850, 700, 500, and 300 mbs, detailed analyses of West African upper-air charts reveal distinct features of the atmospheric flow, especially in connection with mid-tropospheric easterly wave activity over the area.
The history of a semi-vortical perturbation whose motion was in rhythm with the propagation of a 700 mb easterly wave is described.
It is concluded that an easterly wave model incorporating the 700 mb trough (and ridge) as integral feature(s) of the flow describes best the majority of significant weather zones and puts on a firmer basis the existence of westwards moving semi-vortical lines of thunderstorms frequently traversing the heart of West Africa during the rainy seasons.
DOI: https://doi.org/10.3402/tellusa.v22i6.10269 | Journal eISSN: 3035-9554
Language: English
Page range: 663 - 680
Published on: Jan 1, 1970
Published by: Stockholm University Press
In partnership with: Paradigm Publishing Services
© 1970 F. Ola. Okulaja, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.