Engelbrecht, CJLandman, WAEngelbrecht, FA2014-04-102014-04-102013-09Engelbrecht, C.J, Landman, W.A and Engelbrecht, F.A. 2013. The relative contribution of synoptic types to rainfall over the Cape south coast region. In: 29th Annual Conference of South African Society for Atmospheric Sciences, Durban, South Africa, 26-27 September 2013http://hdl.handle.net/10204/735929th Annual Conference of South African Society for Atmospheric Sciences, Durban, South Africa, 26-27 September 2013A synoptic decomposition of rainfall over the Cape south coast region for the period 1979-2011 is presented. This decomposition is achieved by considering the average daily low-level circulation to develop a synoptic climatology, using a Self Organising Map (SOM) technique. Daily area-average rainfall derived from weather station rainfall data is related to the identified synoptic types. It is shown that ridging high pressure systems are responsible most of the annual rainfall (41%) over the Cape south coast region, followed by tropical-temperature troughs (24%), cut-off lows (COLs) (13%), frontal troughs (12%), continental trough – ocean ridge combinations (8%) and weak synoptic flow (2%)enCape south coastSynoptic climatologyRidging high-pressure systemsCut-off lowsConference PresentationEngelbrecht, C., Landman, W., & Engelbrecht, F. (2013). The relative contribution of synoptic types to rainfall over the Cape south coast region. http://hdl.handle.net/10204/7359Engelbrecht, CJ, WA Landman, and FA Engelbrecht. "The relative contribution of synoptic types to rainfall over the Cape south coast region." (2013): http://hdl.handle.net/10204/7359Engelbrecht C, Landman W, Engelbrecht F, The relative contribution of synoptic types to rainfall over the Cape south coast region; 2013. http://hdl.handle.net/10204/7359 .TY - Conference Presentation AU - Engelbrecht, CJ AU - Landman, WA AU - Engelbrecht, FA AB - A synoptic decomposition of rainfall over the Cape south coast region for the period 1979-2011 is presented. This decomposition is achieved by considering the average daily low-level circulation to develop a synoptic climatology, using a Self Organising Map (SOM) technique. Daily area-average rainfall derived from weather station rainfall data is related to the identified synoptic types. It is shown that ridging high pressure systems are responsible most of the annual rainfall (41%) over the Cape south coast region, followed by tropical-temperature troughs (24%), cut-off lows (COLs) (13%), frontal troughs (12%), continental trough – ocean ridge combinations (8%) and weak synoptic flow (2%) DA - 2013-09 DB - ResearchSpace DP - CSIR KW - Cape south coast KW - Synoptic climatology KW - Ridging high-pressure systems KW - Cut-off lows LK - https://researchspace.csir.co.za PY - 2013 T1 - The relative contribution of synoptic types to rainfall over the Cape south coast region TI - The relative contribution of synoptic types to rainfall over the Cape south coast region UR - http://hdl.handle.net/10204/7359 ER -