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No Strings Attached
- Author:
-
Compton Tucker,
Jesse Allen,
Sharon Nicholson
- Subject:
- Science and Technology
- Institution Name:
- NASA
- Collection:
-
NASA GSFC Scientific Visualization Studio
- Grade Level:
- Secondary, Post-secondary
- Abstract:
For many years, scientists have believed that the southern expansion of the Sahara has been due to human activity. However, results from the AVHRR instrument and its measurements of vegetation suggest a different explanation: rainfall patterns. In drier years (1984 was one of the driest summers in recorded history in Northern Africa), the Sahara expands south, but in wetter years (such as 1994), vegetation moves back and there is no net expansion of the Sahara as had been previously suggested.
- Course Type:
- Learning Module
- Languages:
- English
- Material Type:
- Other
- Media Format:
- Graphics/Photos, Text/HTML, Video
- Technical Requirements:
- Real player
- Conditions of Use:
-
Public Domain
Please give credit to NASA GSFC Scientific Visualization Studio
No restrictions on your remixing, redistributing, or making derivative works.
Give credit to the author, as required.
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derivative works.
Copyrighted materials, available under Fair Use and the TEACH Act for US-based
educators, or other custom arrangements. Go to the resource provider to see
their individual restrictions.
African Vegetation: Comparing September 1984 and September 1994
Comments: