Wanders: “The stronger the El Niño signal, the less water is available in the region. … If there is a continuous shortage of water feeding the reservoirs, this will inevitably lead to water shortages and thus drought.
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.
What are the main causes of drought in South Africa?
One of the main causes of drought in South Africa is the variability in rainfall (Mason and Tyson, 2000; Tyson and Preston-Whyte, 2000 and Vogel et al., 2000). The El Niño phenomenon accounts for approximately thirty percent of rainfall variability (Tyson and Preston-Whyte, 2000).
Does El Niño cause drought in Africa?
It can reduce water deficits, but can also result in flooding in some areas. Southern Africa is experiencing its worst drought in 35 years. crisis since 1991/92. The current El Niño is now declining, but hunger is still growing.
How does El Niño affect the climate of South Africa?
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.
How can we stop the drought in South Africa?
Immediate measures to mitigate drought
Water tankering from available sources; Rainwater & fog harvesting; Protection and use of springs; Cloud seeding; Evaporation suppression; Desalination of brackish groundwater or sea water; and Effluent treatment and re-use.
What is the main cause of drought?
When rainfall is less than normal for a period of weeks to years, streamflows decline, water levels in lakes and reservoirs fall, and the depth to water in wells increases. If dry weather persists and water-supply problems develop, the dry period can become a drought. Learn more: USGS Drought website.
How bad is the drought in South Africa?
Much of the Eastern Cape province in South Africa has been experiencing a severe drought since 2015. This drought has had major socio-economic effects particularly on the large impoverished rural population as well as on some urban areas where supplied water services have broken down in several cases.
What are impact of El Niño in Africa?
El Nino Impacts (2015/16 Season)
accompanied by high temperatures leading to: – Reduced crop yields – Cattle deaths – Low dam levels due to less inflows – Sectors affected include food security, livelihoods, agriculture, livestock, nutrition, health and water, sanitation and hygiene (WASH).
What is El Niño drought?
El Niño and La Niña affect not only ocean temperatures, but also how much it rains on land. Depending on which cycle occurs (and when), this can mean either droughts or flooding. Typically, El Niño and its warm waters are associated with drought, while La Niña is linked to increased flooding.