Acoustic sounder observations of the dissipation of nocturnal surface inversions over ridge and valley Terrain

P. D. Tyson; Y. Goldreich; R. G. von Gogh

doi:10.1080/03736245.1980.10559622

Acoustic sounder observations of the dissipation of nocturnal surface inversions over ridge and valley Terrain

P. D. Tyson, Y. Goldreich, R. G. von Gogh

University of the Witwatersrand

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Acoustic sounder data show that over the Highveld of South Africa nocturnal inversions do not dissipate beneath an absolutely stable layer with a constant upper surface height. Instead. penetrative convection and entrainment lift and weaken the echo envelope of the surface inversion so that it slopes upwards with time. Final dissipation is shown to take place at heights exceeding the original inversion-top height by a factor of two to three. Ridge and valley dissipation characteristics are compared and fumigation times for Riven heights of pollution emission are presented.

Original language	English
Pages (from-to)	62-72
Number of pages	11
Journal	South African Geographical Journal
Volume	62
Issue number	1
DOIs	https://doi.org/10.1080/03736245.1980.10559622
State	Published - Apr 1980
Externally published	Yes

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10.1080/03736245.1980.10559622

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AB - Acoustic sounder data show that over the Highveld of South Africa nocturnal inversions do not dissipate beneath an absolutely stable layer with a constant upper surface height. Instead. penetrative convection and entrainment lift and weaken the echo envelope of the surface inversion so that it slopes upwards with time. Final dissipation is shown to take place at heights exceeding the original inversion-top height by a factor of two to three. Ridge and valley dissipation characteristics are compared and fumigation times for Riven heights of pollution emission are presented.

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Acoustic sounder observations of the dissipation of nocturnal surface inversions over ridge and valley Terrain

Abstract

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