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Sand and dust storms are common meteorological hazards in arid and semi-arid regions. They are usually caused by thunderstorms – or strong pressure gradients associated with cyclones – which increase wind speed over a wide area. These strong winds lift large amounts of sand and dust from bare, dry soils into the atmosphere, transporting them hundreds to thousands of kilometres away. Some 40% of aerosols in the troposphere (the lowest layer of Earth’s atmosphere) are dust particles from wind erosion.
Increasing resilience to high-impact weather Climate change is expected to increase the frequency and intensity of high-impact weather events, exacerbating their social and economic blow on people and infrastructure, especially...
Subseasonal-to-Seasonal prediction project Many management decisions, for example in the context of agriculture, have to be taken on sub-monthly scales – a time scale that lies between the well-established and...
Main Project: Global Framework for Climate Services (GFCS) – Adaptation and Disaster Risk Reduction in Africa The WMO Public Weather Services (PWS) programme has implemented projects for many years that...