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Vegetation Images Show Drought in Western US (WMS)
Satellite data can gauge the health of plants, which is a good indicator of drought. The Normalized Difference Vegetation Index (NDVI) measures how dense and green plant leaves are. NDVI images are useful as a measure of drought when compared to 'normal' plant health. Scientists calculate average NDVI values for an area to find out what is normal at a particular time of year. This animation uses satellite imagery to show changes in vegetation between 1999 and 2003. In 2002, drought had settled across the Midwest. Large dark brown sections of eastern Colorado show where vegetation was less lush and healthy than normal. This version of the visualization is a wide view showing the western United States. The data were measured by the vegetation instrument on Europe's SPOT-4 satellite, and were provided by DigitalGlobe/SPOT under agreement with the U.S. Department of Agriculture Foreign Agricultural Service (USDA/FAS).

This animation shows NDVI over the western US in ten-day intervals from 1999-06-10 through 2003-09-30. The area shown extends from California to Colorado, and from Canada to Mexico. The horizontal scale is 0.0735 degrees-pixel in the E-W direction and 0.0450 degrees-pixel N-S.    This animation shows NDVI over the western US in ten-day intervals from 1999-06-10 through 2003-09-30. The area shown extends from California to Colorado, and from Canada to Mexico. The horizontal scale is 0.0735 degrees-pixel in the E-W direction and 0.0450 degrees-pixel N-S.
Duration: 2.0 seconds
Available formats:
  368x488 (29.97 fps) MPEG-1   443 KB
  80x40         PNG           6 KB
  369x491     JPEG         39 KB
  160x80       PNG           23 KB
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Color table showing below normal vegetation as red, brown, orange, and yellow, normal as white, and above normal as greens and purple. 		   Color table showing below normal vegetation as red, brown, orange, and yellow, normal as white, and above normal as greens and purple.

Available formats:
  320 x 90           PNG     798 B

Animation Number:3110
Animators:Jeff de La Beaujardiere (Lead)
 Greg Shirah
 Horace Mitchell
Studio:SVS
Completed:2005-02-16
Scientist:Asaph Anyamba (NASA/GSFC)
Instrument:SPOT-4/VGT-S10
Data set:NDVI
Data Collected:1999--2003
Series:NDVI
 WMS
Keywords:
DLESE >> Climatology
GCMD >> EARTH SCIENCE >> Atmosphere >> Atmospheric Phenomena >> Drought
GCMD >> EARTH SCIENCE >> Biosphere >> Vegetation >> Vegetation Index
View Animation in Google Earth Google Earth KML file is available here.
DEPC Metadata is available here.
 
 
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Scientific Visualization Studio


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