An observational study of 300 mb winds in the tropical belt. Part II: Dynamical interpretation |
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| Authors: | N D Pyuzza G C Asnani P M R Kiangi |
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| Institution: | (1) Department of Meteorology, University of Nairobi, Nairobi, Kenya;(2) Present address: Directorate of Meteorology, Dar-es-Salaam, Tanzania;(3) Present address: Theoretical Studies Division, Indian Institute of Tropical Meteorology, 411005 Pune, India |
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| Abstract: | An estimate of the magnitudes of the absolute vorticity advection terms and the terms in the balance equation suggest that
the use of the barotropic vorticity equation within 5 degrees of latitude of the equator is not very good and that the linear
balance equation is as good as the nonlinear balance equation in the equatorial region.
Zonal Fourier analysis has revealed that the contribution from planetary scale waves is much larger than that from synoptic
scale waves, being more in the winter hemisphere than in the summer hemisphere.
In classical scale analysis there must be a distinction in wavelength between the zonal and the meridional directions for
planetary scale waves. This distinction does not appear to be necessary for synoptic scale waves. |
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| Keywords: | Barotropic vorticity equation Zonal Fourier analysis Scale analysis |
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