Enhancement and suppression of urban heat plumes over Johannesburg

Y. Goldreich, P. D. Tyson, R. G. Von Gogh, G. P.N. Venter

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Observations of the atmospheric temperature structure over Johannesburg have revealed the existence of both well-developed and suppressed heat plumes. Suppressed plumes appear to be associated with the incidence in a stable atmosphere of positive wind shear and well-developed katabatic flow away from the city. A localised cool region in the atmosphere above the central city is invariably associated with suppressed plume development. A tentative identification of wind shear and katabatic flow as the major influences on such structures is strengthened by the observation that during conditions of negative windshear and reduced katabatic advection, significant heat plumes are developed. It is at present not possible to assess the extent to which the observations and causative processes are site-specific.

Original languageEnglish
Pages (from-to)115-126
Number of pages12
JournalBoundary-Layer Meteorology
Volume21
Issue number1
DOIs
StatePublished - Aug 1981
Externally publishedYes

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