African Vegetation: Comparing July 1984 and July 1994
- Visualizations by:
- Jesse Allen
- View full credits
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.
Credits
Please give credit for this item to:
NASA/Goddard Space Flight Center
Scientific Visualization Studio
Animator
- Jesse Allen (SSAI) [Lead]
Scientists
- Compton Tucker (NASA/GSFC)
- Sharon Nicholson (Florida State University)
Datasets used in this visualization
NOAA-11 (Collected with the AVHRR sensor)
NOAA-12 (Collected with the AVHRR sensor)
NOAA-7 (Collected with the AVHRR sensor)
NOAA-8 (Collected with the AVHRR sensor)
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.
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