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The different categories of droughts have different causes but similar effects: Meteorological drought occurs when there is a prolonged time with less than average precipitation. [21] Meteorological drought usually precedes the other kinds of drought. [22]
Increased drought frequency and severity is also expected to be one of the effects of global warming. Drought having an acute economic impact in the history of the United States occurred during the 1930s and 1940s, periods of time known as 'Dust Bowl' years where relief and health agencies became overburdened and many local community banks had ...
The immediate cause of desertification is the loss of most vegetation. This is driven by a number of factors, alone or in combination, such as drought, climatic shifts, tillage for agriculture, overgrazing and deforestation for fuel or construction materials.
Since 2000, climate change has been the primary cause of both the expansion of the drought area and the increase in drought severity, with that percentage rising to over 90% during the drought period.
In a remote southeastern corner of Zimbabwe, people watched from cars or towers in an annual wildlife census, peering through binoculars at animals coming to drink at waterholes and jotting down ...
Across the world, drought is on the rise this summer, and the receding water levels in rivers and lakes are exposing long-hidden secrets and artifacts. Some leave a chilling warning for humanity ...
Human resource exploitation (such as overgrazing and deforestation) was first thought to be the sole cause of the drought. Nonetheless, large-scale climate changes may have contributed to the drought. Despite being the most severely impacted region in Africa, the Sahel is not the only one afflicted by desertification.
Periods of drought effect Southern Africa's various biomes and wildlife, while reduced water levels in rivers can cause hydroelectric dams to operate at reduced capacity. [9] El Niño events in Southern Africa also increase the likelihood of African armyworm outbreaks, further decreasing the region's agricultural output. [10]