The New Encyclopædia Britannica: The new Encyclopædia BritannicaEncyclopædia Britannica, 1992 |
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Page 463
... Sahara and the Sahel as a deep stream of dry , often dusty air . As a surface northeasterly , it is generally known as the harmattan , gusty and dry in the extreme- cool at night and scorchingly hot by day . As in a thorough monsoonal ...
... Sahara and the Sahel as a deep stream of dry , often dusty air . As a surface northeasterly , it is generally known as the harmattan , gusty and dry in the extreme- cool at night and scorchingly hot by day . As in a thorough monsoonal ...
Page 507
... Sahara in Africa , is extremely prone to drought . Persistent drought conditions , coupled with substantial population growth in the region ( an increase of more than 30 percent since the early 1950s ) and a doubling of the livestock ...
... Sahara in Africa , is extremely prone to drought . Persistent drought conditions , coupled with substantial population growth in the region ( an increase of more than 30 percent since the early 1950s ) and a doubling of the livestock ...
Page 737
... Sahara and other present - day arid regions into areas that are now more humid . The best evidence for these changes is the presence of sand seas that are immobilized by vegetation . Dunes formed under similar climates in the geologic ...
... Sahara and other present - day arid regions into areas that are now more humid . The best evidence for these changes is the presence of sand seas that are immobilized by vegetation . Dunes formed under similar climates in the geologic ...
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