dc.contributor.author |
Malherbe, Johan
|
|
dc.contributor.author |
Engelbrecht, FA
|
|
dc.contributor.author |
Landman, WA
|
|
dc.contributor.author |
Engelbrecht, CJ
|
|
dc.date.accessioned |
2012-07-09T13:18:07Z |
|
dc.date.available |
2012-07-09T13:18:07Z |
|
dc.date.issued |
2011-03 |
|
dc.identifier.citation |
Malherbe, J, Engelbrecht, FA, Landman, WA and Engelbrecht, CJ. 2011. Tropical systems from the southwest Indian Ocean making landfall over the Limpopo River Basin, southern Africa: a historical perspective. International Journal of Climatology, vol. 32(7), pp 1018-1032 |
en_US |
dc.identifier.issn |
0899-8418 |
|
dc.identifier.issn |
1097-0088 |
|
dc.identifier.uri |
http://onlinelibrary.wiley.com/doi/10.1002/joc.2320/abstract
|
|
dc.identifier.uri |
http://hdl.handle.net/10204/5988
|
|
dc.description |
Copyright: 2011 Wiley. This is the post-print version of the work. The definitive version is published in the International Journal of Climatology, vol. 32(7), pp 1018-1032 |
en_US |
dc.description.abstract |
The study provides perspective on the contribution of landfalling tropical systems (cyclones, depressions, storms and lows) from the southwest Indian Ocean (SWIO) towards rainfall over the eastern interior of southern Africa, over the period 1948–2008. Although these systems contribute to <10% of the annual rainfall occurring over the region, their relative contribution to local and widespread heavy rainfall events is shown to be highly significant. About 50% of widespread heavy rainfall events over northeastern South Africa are caused by landfalling tropical systems. Fourier analysis performed on the time series of rainfall occurring over northeastern South Africa in association with these systems reveals the existence of a quasi-18-year cycle. The cycle coincides with the well-known quasi-18-year Dyer–Tyson cycle in rainfall over the summer rainfall region of South Africa. These results suggest that atmospheric and surface conditions leading to wet phases of the Dyer–Tyson cycle also favour the landfall and subsequent westward movement of tropical systems from the SWIO over southern Africa – and their eventual contribution to rainfall over northeastern South Africa and southern Zimbabwe. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Wiley |
en_US |
dc.relation.ispartofseries |
Workflow;8575 |
|
dc.subject |
Tropical cyclone |
en_US |
dc.subject |
Landfall |
en_US |
dc.subject |
Rainfall cyclicity |
en_US |
dc.subject |
Tropical systems |
en_US |
dc.subject |
Southern Africa tropical systems |
en_US |
dc.subject |
Fourier analysis |
en_US |
dc.subject |
Closed-low tracking |
en_US |
dc.title |
Tropical systems from the southwest Indian Ocean making landfall over the Limpopo River Basin, southern Africa: a historical perspective |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Malherbe, J., Engelbrecht, F., Landman, W., & Engelbrecht, C. (2011). Tropical systems from the southwest Indian Ocean making landfall over the Limpopo River Basin, southern Africa: a historical perspective. http://hdl.handle.net/10204/5988 |
en_ZA |
dc.identifier.chicagocitation |
Malherbe, Johan, FA Engelbrecht, WA Landman, and CJ Engelbrecht "Tropical systems from the southwest Indian Ocean making landfall over the Limpopo River Basin, southern Africa: a historical perspective." (2011) http://hdl.handle.net/10204/5988 |
en_ZA |
dc.identifier.vancouvercitation |
Malherbe J, Engelbrecht F, Landman W, Engelbrecht C. Tropical systems from the southwest Indian Ocean making landfall over the Limpopo River Basin, southern Africa: a historical perspective. 2011; http://hdl.handle.net/10204/5988. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Malherbe, Johan
AU - Engelbrecht, FA
AU - Landman, WA
AU - Engelbrecht, CJ
AB - The study provides perspective on the contribution of landfalling tropical systems (cyclones, depressions, storms and lows) from the southwest Indian Ocean (SWIO) towards rainfall over the eastern interior of southern Africa, over the period 1948–2008. Although these systems contribute to <10% of the annual rainfall occurring over the region, their relative contribution to local and widespread heavy rainfall events is shown to be highly significant. About 50% of widespread heavy rainfall events over northeastern South Africa are caused by landfalling tropical systems. Fourier analysis performed on the time series of rainfall occurring over northeastern South Africa in association with these systems reveals the existence of a quasi-18-year cycle. The cycle coincides with the well-known quasi-18-year Dyer–Tyson cycle in rainfall over the summer rainfall region of South Africa. These results suggest that atmospheric and surface conditions leading to wet phases of the Dyer–Tyson cycle also favour the landfall and subsequent westward movement of tropical systems from the SWIO over southern Africa – and their eventual contribution to rainfall over northeastern South Africa and southern Zimbabwe.
DA - 2011-03
DB - ResearchSpace
DP - CSIR
KW - Tropical cyclone
KW - Landfall
KW - Rainfall cyclicity
KW - Tropical systems
KW - Southern Africa tropical systems
KW - Fourier analysis
KW - Closed-low tracking
LK - https://researchspace.csir.co.za
PY - 2011
SM - 0899-8418
SM - 1097-0088
T1 - Tropical systems from the southwest Indian Ocean making landfall over the Limpopo River Basin, southern Africa: a historical perspective
TI - Tropical systems from the southwest Indian Ocean making landfall over the Limpopo River Basin, southern Africa: a historical perspective
UR - http://hdl.handle.net/10204/5988
ER -
|
en_ZA |