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Variability and trends of rainfall, precipitation and discharges over zambezi river basin, southern africa: review

F. Banze,Jiali Guo,Xiaotao Shi

Published 2018 in Unknown venue

ABSTRACT

Human influence on the climate system is clear, and recent anthropogenic emissions of greenhouse gases are the highest in history. Their effects, together with those of other anthropogenic drivers, have been detected throughout the climate system and are extremely likely to have been the dominant cause of the observed warming since the mid-20th century. Recent climate changes have had widespread impacts on human and natural systems. Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia.1 according to Res & Trenberth,2 there is a direct influence of global warming on precipitation. Increased heating leads to greater evaporation and thus surface drying, thereby increasing the intensity and duration of drought. The African continent has been identified as particularly vulnerable to the changing climate due to its envisaged low adaptive capacity and vulnerability and the southern African region is regarded as one of the most vulnerable regions in Africa.3 This affects the water resource in terms of quality and quantity of water.4 Africa is highly vulnerable to the impacts of climate change and numerous climate change models predict that the continent’s weather patterns will become more variable, and extreme weather events are expected to be more frequent and severe, with increasing risk to health and life.1,4,5 The droughts and floods will increase in their frequency leading to more water stress. Alterations in agricultural, livestock and fisheries productivity will occur and Africa will face further food insecurity as well as possibly the spread of water-related diseases.

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