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Climate is a changing phenomenon, the first signs of alteration appearing in its day-to-day behavior—i.e., the weather. One readily observable recent climatic change is the increase in the number and ferocity of giant weather events like hurricanes. This program explains the origin of tropical storms, tropical rainforests, and polar deserts. It shows the route and the effect of the Gulf Stream and explains its role in the Little Ice Age of the 16th century; theorizes about the events that caused the Sahara to become desert; and examines the link between these events, changes in the sun’s activity, and cycles involving dust storms and volcanic eruption. (26 minutes)



 
                

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Copyright date: ©1990



Part of the Series : Climate and Man
     


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Mapping the Weather

This program covers the weather in all its aspects: how it is measured, the efforts to forecast it, its economic and human effects. The immensely complex physics, chemistry, and mathematics scientists use to study the atmospheric system-from the sun,...(more details)
 
The Greenhouse Effect
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A life-sustaining envelope of gas surrounds the earth. This atmosphere contains oxygen, CO2, water vapor, and other gases-it is what generates climate, which affects all living beings. This program analyzes the sun's gradual brightening and the relat...(more details)
 
Global Warming
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The history of Earth has been a history of temperature change; people and animals have historically moved to better climes, richer pastures, and areas of more abundant food. The problem now is that "somewhere else" is already occupied; meanwhile, tem...(more details)
 
Civilization and Climate
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Changing climate probably played the decisive role in drawing hominids out of the trees, up on their hind legs, and off in search of food whose supply had been dispersed by the replacement of rainforests by grasslands. Migrations were motivated by th...(more details)
 
Modifying the Weather: The Case of the Man-Made Desert
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By building roads, watering crops, and grazing cattle, we are constantly changing the climate. We may also modify the weather by cloud seeding, though there is no scientifically accepted proof that rain or snow would not have occurred naturally in c...(more details)
 


See additional titles in Weather & Climate | Ecosystems