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You also read that both nature and humans influence desertification. Here we look at one region that has captured the attention of the world for at least the past 40 years— the Sahel of north Africa. Beginning in the 1960s, the area became very dry and hundreds of ... History of Desertification in Sahara and Sahel...
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oceanworld.tamu.edu/resources/oceanography-book/deserti...
oceanworld.tamu.edu/resources/oceanography-book/desertificationinsahel.html
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That era contrasts sharply with the stark poverty and the barren lands so prominent in the Sahel today. During the twentieth century, ... As an operational concept, the term desertification is nebulous, a murky mix of climatological variables and human activities that degrade lands in arid or semiarid regions (Morris 1995).
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www.perc.org/articles/article142.php
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In the Sahel region of West Africa, decades of scant rainfall and poor farming techniques have left a legacy of creeping desertification. Local people, researchers and human rights activists alike are struggling to cope with the heavy human and environmental toll.
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www.scidev.net/en/features/sciences-struggle-against-sa...
www.scidev.net/en/features/sciences-struggle-against-sahel-desertification.html
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Desertification occurs when land surfaces are transformed by human activities, including overgrazing, deforestation, surface land mining, and poor irrigation techniques, during a natural time of drought. Desertification in the Sahel can largely be attributed to greatly increased numbers of humans and their grazing cattle.
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earthobservatory.nasa.gov/Features/DustBowl/
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Current information about climate and the environment. ... But before the vegetation index could be used to map out desertification in the Sahel, Prince, Tucker, and others studying the phenomenon needed two things: a clear definition of what qualifies as desertification and a long record of vegetation conditions in the Sahel.
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earthobservatory.nasa.gov/Features/Desertification/
earthobservatory.nasa.gov/Features/Desertification/
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This degradation of formerly productive land-- desertification--is a complex process. It involves multiple causes, and it proceeds at varying rates in ... Camels and other animals trample the soil in the semiarid Sahel of Africa as they move to water holes such as this one in Chad (photograph courtesy of the U.S.
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pubs.usgs.gov/gip/deserts/desertification/
pubs.usgs.gov/gip/deserts/desertification/
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At about the same time, one event served to focus world attention on desertification: the 1969 to 1973 drought in the African Sahel. Recognition of the severity of the drought affecting six countries on the southern border of the Sahara (Mauritania, Senegal, Mali, Upper Volta, Niger, and Chad) was slow to develop.
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www.ciesin.org/docs/002-193/002-193.html
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afrol News, 4 July - Climatic evidence collected over the 20th century raises concern over the desertification process of the Sahel zone.
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www.afrol.com/News2002/wa007_sahel_desert.htm
www.afrol.com/News2002/wa007_sahel_desert.htm
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C. T. Agnew 1995 Desertification, drought, and development in the Sahel. In People and Environment in Africa, ed. T. Binns, ... Sahel desertification: History of an idea ... peak of major Sahel drought, emergence of desertification as major env issue, and development of scientific theory attributing the problem to human misuse...
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www.artsci.wustl.edu/~anthro/courses/306/sahel-desertif...
www.artsci.wustl.edu/~anthro/courses/306/sahel-desertification.html
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