book chapter · Ecological studies
Southern Africa faces severe climate risks as warming and drying trends amplify existing water stress. Climate projections show strong agreement that the region will generally become drier, with low mitigation scenarios making drastic warming, lower soil moisture, and more frequent heatwaves and fire-danger days virtually certain. Recent observations already show regional warming, drying across both summer and winter rainfall areas, and an increase in intense rainfall events. The region risks crossing critical tipping points that could trigger unprecedented consequences. Potential impacts include day-zero water crises in South Africa's Gauteng province, the collapse of regional maize and cattle sectors, unprecedented heatwave intensities, and the southward shift of intense tropical cyclone landfalls. While meeting Paris Accord targets could avert many of these outcomes, adaptation planning and research to quantify tipping-point probabilities remain urgent priorities across Southern Africa.
Southern Africa is exceptionally vulnerable to climate shifts that threaten basic water and food security. If regional climate thresholds are crossed, key economic drivers such as cattle and maize farming could collapse, alongside severe municipal water shortages in major urban centres like Gauteng. Understanding these risks provides vital evidence for regional policymakers to prioritise and fund proactive adaptation measures.
The abstract does not present a direct commercial product, representing early-stage climate risk analysis. However, the findings provide vital baseline data that could inform adaptation planning, climate-resilient agricultural strategies, and municipal water management systems. Potential users include public-sector planners, disaster management agencies, and agricultural sector strategists seeking to build resilience against extreme heat, drought, and shifting cyclone tracks.
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Abstract Southern Africa is a climate change hotspot with projected warming and drying trends amplifying stresses in a naturally warm, dry and water-stressed region. Despite model-projected uncertainty in rainfall change over the eastern escarpment of South Africa, strong model agreement in projections indicates that southern African is likely to become generally drier. Sharply increased regional warming and associated strong reductions in soil-moisture availability and increases in heat-waves and high fire-danger days are virtually certain under low mitigation futures. Changes are detectible in observed climate trends for the last few decades, including regional warming, drying in both the summer and winter rainfall regions, and increases in intense rainfall events. The southern African climate is at risk of tipping into a new regime, with unprecedented impacts, such as day-zero drought in the Gauteng province of South Africa, collapse of the maize and cattle industries, heat-waves of unprecedented intensity and southward shifts in intense tropical cyclone landfalls. Many of these adverse changes could be avoided if the Paris Accord’s global goal were to be achieved, but research is urgently required to quantify the probabilities of such tipping points in relation to future levels of global warming. Adaptation planning is an urgent regional priority.
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DOI: 10.1007/978-3-031-10948-5_7
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