Die struktuur en moontlike aandrywingskragte van die 1991 - 1992 - droogte in Suidelike Afrika

Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie/South African Journal of Science and Technology

 
 
Field Value
 
Title Die struktuur en moontlike aandrywingskragte van die 1991 - 1992 - droogte in Suidelike Afrika The structure and possible forcing mechanisms of the 1991-1992 drought in Southern Africa
 
Creator Jury, M. R.
 
Subject — — — —
Description 'n Diagnostiese model word gebruik om die onderliggende atmosferiese prosesse wat aanleiding gegee het tot die 1991-1992- droogte oor Suidelike Afrika, te ondersoek. Dit blyk dat 'n styging in seeoppervlaktemperature van meer as 1 °C in die tropiese deel van die Suid-Indiese Oseaan in die winter van 1991 aanleiding kon gegee het tot 'n afwyking in die gemiddelde Walker-sirkulasie. Hierdeur is die invloei van warm, vogtige lug vanaf die Mosambiekkanaal oor die oostelike platorand van Suidelike Afrika moontlik onderdruk, met 'n gepaardgaande afname in reenval. Die afleiding word gemaak dat die patroon en siklusse van somerreënval oor Suidelike Afrika nou goed genoeg verstaan word om tentatiewe voorspellings te waag, maar dat toenemende samewerking tussen instansies in Suider-Afrika wat hulle met die weerkunde besig hou, hiervoor nodig is. A diagnostic model is used to investigate the underlying atmospheric processes that gave rise to the 1991-1992 drought over Southern Africa. The first indicator of the impending drought was a rise of more than 1 °C in the sea surface temperatures of the tropical part of the Southern Indian Ocean in the winter of 1991. This may have been instrumented in causing an anomaly in the mean Walker circulation to develop, through which the inflow of warm, moist air from the Mozambique Channel to the eastern escarpment of Southern Africa was inhibited, with a concurrent reduction in rainfall. It is concluded that the pattern and cycles of summer rainfall over Southern Africa are now sufficiently well understood to venture tentative predictions, but that increased co-operation between the meteorological bodies of Southern Africa will be required to achieve this.
 
Publisher AOSIS
 
Contributor — —
Date 1993-07-09
 
Type info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion — — — —
Format application/pdf
Identifier 10.4102/satnt.v12i1.551
 
Source Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie; Vol 12, No 1 (1993); 8-16 Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie; Vol 12, No 1 (1993); 8-16 2222-4173 0254-3486
 
Language eng
 
Relation
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:

https://journals.satnt.aosis.co.za/index.php/satnt/article/view/551/983
 
Coverage — — — — — —
Rights Copyright (c) 1993 M. R. Jury https://creativecommons.org/licenses/by/4.0
ADVERTISEMENT