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Intensity and spatial extension of drought in South Africa at different time scales
The standardised precipitation index (SPI) is an index that allows monitoring the intensity and spatial extension of droughts at different time scales (3, 6, 12 and 24 months). The SPI is linked toExpand
Rainfall Variability and Changes in Southern Africa during the 20th Century in the Global Warming Context
Rainfall variability and changes in Southern Africa over the 20th century areexamined and their potential links to the global warming discussed. After a shortreview of the main conclusions of variousExpand
A statistical study of NDVI sensitivity to seasonal and interannual rainfall variations in Southern Africa
The relation between rainfall and the Normalized Difference Vegetation Index (NDVI) in Africa south of 15 S (1983-1988) is studied. For 115 1 by 1 grid-points, the spatial distribution of annual NDVIExpand
Intensity and spatial extent of droughts in southern Africa
[1] The standardized precipitation index allows for monitoring the intensity and spatial extent of droughts at different time scales. We used it to do a retrospective analysis of the spatial extentExpand
Determinants of the interannual relationships between remote sensed photosynthetic activity and rainfall in tropical Africa
The response of photosynthetic activity to interannual rainfall variations in Africa South of the Sahara is examined using 20 years (1981-2000) of Normalised Difference Vegetation Index (NDVI) AVHRRExpand
20th century droughts in southern Africa: spatial and temporal variability, teleconnections with oceanic and atmospheric conditions
Southern African rainfall does not show any trend to desiccation during the 20th century. However, the subcontinent experienced particularly severe droughts in the 1980s and at the beginning of theExpand
Modification of the southern African rainfall variability/ENSO relationship since the late 1960s
Abstract Analysis of 149 raingauge series (1946–1988) shows a weak positive correlation between late summer rainfalls (January–March) in tropical southern Africa and the Southern Oscillation IndexExpand
Sea-surface temperature co-variability in the southern Atlantic and Indian Oceans and its connections with the atmospheric circulation in the Southern Hemisphere
The relationship between sea-surface temperature (SST) inter-annual variability at the subtropical and midlatitudes of the southern Atlantic and Indian Oceans and its links with the atmosphericExpand
The influence of ENSO on winter rainfall in South Africa
Whereas the impact of ENSO on the African summer rainfall regions is largely documented and still regularly investigated, little is known about its impact on the winter rainfall regions located atExpand
Compared regimes of NDVI and rainfall in semi‐arid regions of Africa
Bi‐monthly normalized difference vegetation index (NDVI) at an 8 km spatial resolution from the advanced very high resolution radiometers (AVHRR) was used from 1981 to 1995 to analyse the vegetationExpand