Diurnal and inter-diurnal variations in large-scale atmospheric turbulence over Southern Africa

Y. Goldreich, P. D. Tyson

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Hourly wind speeds at eighteen stations have been used to determine regional and seasonal diurnal and inter-diurnal wind variabilities in southern Africa. From the ratio of the diurnal/inter-diurnal variabilities the degree to which diurnal boundary layer processes dominate the near-ground windfield has been established and mapped in generalised form for the sub-continent at different times of year. Results show the predominance at all times of mesoscale effects over those of synoptic scale in the generation of large-scale atmospheric turbulence in the boundary layer.

Original languageEnglish
Pages (from-to)48-56
Number of pages9
JournalSouthern African Geographical Journal
Volume70
Issue number1
DOIs
StatePublished - Apr 1988
Externally publishedYes

Bibliographical note

Funding Information:
Acknowledgements The authors wish to thank the South African Weather Bureau for their help inprovidi!l~ata, Mrs W. J9b for dr:'I\yin.s the_ di~rams! a!!..d the Foundation for Research Development of the CSIR and the University of the Witwatersrand for funding the research.

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