Modelled Sea-Surface Temperature Scenario Considerations and Southern African Seasonal Rainfall and Temperature Predictability Report to the Water Research Commission By Asmerom F. Beraki 1 , Willem A. Landman 2 , David G. DeWitt 3 , Cobus Olivier 1 , Kelebogile Mathole 1 , Thando Ndarana 1 1 South African Weather Service Pretoria, South Africa 2 Council for Scientific and Industrial Research, Natural Resources and Environment Pretoria, South Africa 3 International Research Institute for Climate Prediction, Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York, USA WRC Report No. 1913/1/12 ISBN 978-1-4312-0383-3 March 2013