1. International Centre for Applied Climate Science; University of Southern Queensland; Toowoomba Queensland 4350 Australia
2. International Research Institute for Climate and Society; The Earth Institute Columbia Univ.; New York NY 10964
3. Dep. of Geography, Geoinformatics and Meteorology; Univ. of Pretoria; Pretoria 0083 South Africa
4. School of Geography, Archaeology and Environmental Studies; Univ. of the Witwatersrand; Johannesburg South Africa
5. Climate Systems Analysis Group, Dep. Environment and Geographical Science; Univ. of Cape Town; 7701 South Africa
6. Agricultural Research Council, Institute for Soil, Climate and Water; 600 Belvedere St. Arcadia Pretoria South Africa
7. Climate Change and Disaster Management; Dep. of Agriculture, Forestry and Fisheries; 100 Hamilton St. Arcadia Pretoria South Africa