Three dimensional flow,temperature and humidity patterns and atmospheric fluxes over Africa during northern summer of 1971
Abstract
The problem of year to year variability of tropical
rainfall attracts much attention in the wake of occurrence of
severe floods and droughts over large areas. The severe drought
That prevailed in the Sudano-Sahe1ian regions of Africa during
the early seventies is the point in mind. Many studies have been
carried out in an attempt to understand the possible causes of
the Sudano-Sahelian drought. In the study we attempt to perform
an investigation on the atmospheric conditions that prevailed
in the African troposphere during the northern summer, the rainy
months in the Sudano-Sahelian region, of 1971. To achieve this
we investigate the mean meridional, zonal motions, temperature
fields, atmospheric fluxes of water vapour, angular momentum
and sensible heat over African during northern summer of 1971.
The results obtained from this study are contrasted with seasonal patterns over the year. The work involved utilization of
upper air data for 76 stations made available from some.of the
African countries and data extracted from daily charts prepared
at the Regional Meteorological Center Nairobi for the period
June, July-and August 1971.
The results concerning the zonal wind show large positive
westerly anomaly at 850 mb in June, July and August; at 700 mb
in July and August and at 500 mb in August between 5~S - 10~N.
Also large positive easterly anomaly is observed at 400 - 100
mb over central parts of the continent at 3-5 mainly in
July and August as the intensity of the tropical Easterly Jet
increases in the area
Citation
Master of Science in MeteorologySponsorhip
University of NairobiPublisher
Department of Meteorology University of Nairobi