What caused the drought in South Africa?
Extreme drought events in southern Africa are the result of a number of atmospheric circulation interactions (Tyson, 1986; Lindesay, 1998) with some droughts and periods of reduced rainfall, for example, connected with ENSO events.
How does El Niño cause drought?
High-pressure systems reduce evaporation and moisture in the atmosphere. El Niño – as the surface temperature of the Pacific Ocean around the central South American coast increases, storm patterns are disrupted. This phenomenon is thought to create droughts in Indonesia and Australia.
How does El Niño affect South African weather?
How does this affect SA? “It causes below normal rainfall in summer rainfall areas and higher than normal temperatures from December to February,” explained Engelbrecht. … This is because sea temperatures rise, which makes the air more dry and humid, influencing hotter weather patterns.
Does El Niño cause drought in Africa?
On the contrary, in Southern Africa, strong El Niño events frequently cause drought and reduce crop production and this effect could be particularly dangerous considering the low crop production of this region in the 2014-2015 season.
How can we stop the drought in South Africa?
Protection and use of springs; Cloud seeding; Evaporation suppression; Desalination of brackish groundwater or sea water; and Effluent treatment and re-use. Developing and integrating other sources like groundwater, desalination and re-use, etc., with surface systems also to enhance water security.
What causes El Niño?
El Niño occurs when warm water builds up along the equator in the eastern Pacific. The warm ocean surface warms the atmosphere, which allows moisture-rich air to rise and develop into rainstorms. The clearest example of El Niño in this series of images is 1997.
What is the duration of El Niño?
How long do El Niño and La Niña typically last? El Niño and La Niña episodes typically last 9-12 months. They both tend to develop during the spring (March-June), reach peak intensity during the late autumn or winter (November-February), and then weaken during the spring or early summer (March-June).