What caused the East African drought?
The drought is tied to the strong La Niña conditions that prevailed in late 2010 and early 2011. La Niña shifts ocean temperatures and air pressure over the Pacific Ocean, and its effects ripple through weather patterns around the world. In East Africa, La Niña causes drought.
Why is East Africa so dry?
Large differences in the temperature of the Indian and Pacific oceans 2 million years ago shifted rainfall patterns and dried out East Africa, replacing woodland with grassland and leading to an explosion in the number of species that grazed the region, according to results presented here today at the annual meeting of …
When did the East African drought occur?
Between July 2011 and mid-2012, a severe drought affected the entire East African region. Said to be “the worst in 60 years”, the drought caused a severe food crisis across Somalia, Djibouti, Ethiopia and Kenya that threatened the livelihood of 9.5 million people.
What are the main causes of drought?
A lack of water in stores such as rivers, lakes, reservoirs and aquifers (water stored underground naturally) can lead to drought. Areas that rely on rainfall and surface water are more likely to experience drought. Surface water quickly evaporates in warm, dry conditions leading to an increased risk of drought.
What are 5 causes of drought?
Here are the 5 natural and human causes of drought:
- 1) Land and water temperatures cause drought. …
- 2) Air circulation and weather patterns also cause drought. …
- 3) Soil moisture levels also contribute to drought. …
- 4) Drought can also be a supply and demand of water issue.
When was the worst drought in Africa?
2010-11: The worst drought in 60 years…
It was the worst drought for 60 years and triggered an official declaration of famine.
Is Africa getting rain?
The latest decadal predictions, covering the five-year period from 2020 to 2024, shows continued warming and decreasing rainfall especially over North and Southern Africa, and increased rainfall over the Sahel.
Is Africa getting wetter?
Africa has been warming progressively since the start of the last century, and in the next five years, northern and southern Africa are set to get drier and hotter, while the Sahel region of Western Africa will get wetter, WMO’s Regional Strategic Office Director, Filipe Lucio, told a press conference.
Why is Africa so dry?
African deserts are the sunniest and the driest parts of the continent, owing to the prevailing presence of the subtropical ridge with subsiding, hot, dry air masses. … The equator runs through the middle of Africa, as do the Tropic of Cancer and the Tropic of Capricorn, making Africa the most tropical continent.
Does South Africa still have a drought?
The drought continued to 2019 with multiple regions in Southern Africa seeing significantly reduced levels of rainfall. … As of April 2019, parts of Southern Africa remain affected by the ongoing drought.
What country has the worst drought?
Botswana ranks as the country with the highest drought risk mainly due to its high exposure combined with its relatively high vulnerability (S1). …
Why Africa Has No rain?
The cooler temperatures in the north weakened the high altitude Tropical Easterly Jet, which consistently brought moisture into northern Africa. Due to the weakening of the Tropical Easterly Jet, the African Easterly Jet strengthened, which indirectly inhibits rainfall in northern Africa.
How can we prevent drought?
Choose a water-efficient irrigation system such as drip irrigation for your trees, shrubs, and flowers. Turn irrigation down in fall and off in winter. Water manually in winter only if needed. Put a layer of mulch around trees and plants to reduce evaporation and keep the soil cool.
What are the 4 types of drought?
As a result, the climatological community has defined four types of drought: 1) meteorological drought, 2) hydrological drought, 3) agricultural drought, and 4) socioeconomic drought.
What happens in a drought?
A drought is a period of time when an area or region experiences below-normal precipitation. The lack of adequate precipitation, either rain or snow, can cause reduced soil moisture or groundwater, diminished stream flow, crop damage, and a general water shortage.