Detail View: NASA Scientific Visualization Studio Collection: African Vegetation: Comparing July 1984 and July 1994

Title: 
African Vegetation: Comparing July 1984 and July 1994
Instrument: 
NOAA-11/AVHRR
Description: 
NDVI measures of north Africa, July 1994
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.
Completed: 
1999-01-01
Credit: 
*Please give credit for this visualization to* NASA/Goddard Space Flight Center Scientific Visualization Studio
Studio: 
SVS
Animator: 
Jesse Allen (Lead)
Scientist: 
Compton Tucker (NASA/GSFC)
Data Collected: 
1984/07, 1994/07
Keywords: 
Africa
note: 
More Information on this topic available at stories/NDVI/africa_july8494.html
Video: 
SVS1999-0008* * *
facet_where: 
Florida
facet_when: 
July 1984
facet_when_year: 
1984
Animation Number: 
589
UID: 
SPD-SCIVS-http://svs.gsfc.nasa.gov/vis/a000000/a000500/a000589/nafrica_july94-IMAGE
original url: 
http://svs.gsfc.nasa.gov/vis/a000000/a000500/a000589/index.html