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Global EVI from Spring to Winter
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Traditional satellite-based mapping of vegetation vigor and amount is based on the way vegetation interacts with red and infrared light. Occasionally, however, those two signals are not enough. MODIS measures light reflected from Earth at a variety of wavelengths, and the Arizona researchers incorporate the additional information into their Enhanced Vegetation Index (EVI). The EVI has increased sensitivity within very dense vegetation, and it has built-in corrections for several factors that can interfere with the satellite-based vegetation mapping, like smoke and background noise caused by light reflecting off soil. The bi-weekly and monthly vegetation index maps have wide usability by biologists, natural resources managers, and climate modelers. They can track naturally occurring fluctuations in vegetation, such as seasonal changes, as well as those that result from land use change, such as deforestation. The EVI can also monitor changes in vegetation resulting from climate change, such as expansion of deserts or extension of growing seasons.
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Global view of vegetation variation from Spring, 2000 through Winter, 2001.
Duration: 8.0 seconds
Available formats:
320x240 (30 fps)
MPEG-1
1 MB
320x240
JPEG
6 KB
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Global EVI in Fall, 2000.
Available formats:
2560 x 1920
TIFF
1 MB
320 x 240
JPEG
9 KB
160 x 80
PNG
11 KB
80 x 40
PNG
4 KB
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Global EVI in Spring, 2000.
Available formats:
2560 x 1920
TIFF
1 MB
320 x 240
JPEG
9 KB
80 x 40
PNG
3 KB
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Global EVI in Summer, 2000.
Available formats:
2560 x 1920
TIFF
1 MB
320 x 240
JPEG
9 KB
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Global EVI in Winter, 2001.
Available formats:
2560 x 1920
TIFF
1 MB
320 x 240
JPEG
9 KB
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| Animation Number: | 2317 |
| Animator: | Joycelyn Thomson (Lead) |
| Studio: | SVS |
| Completed: | 2001-12-12 |
| Scientists: | Alfredo Huete (University of Arizona) |
| | Kamel Didan (University of Arizona) |
| Writer: | Rebecca E. Lindsey |
| Instrument: | Terra/MODIS |
| Data Collected: | Spring 2000 through Winter 2001 |
| Video: | SVS2001-0022 * |
Keywords:
DLESE
>> Agricultural science
DLESE
>> Biology
SVS
>> EVI
SVS
>> Vegetation
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Please give credit for this item to
NASA/Goddard Space Flight Center
Scientific Visualization Studio |
*Please note: the SVS does not fulfill requests for copies of the tapes in our library. On some of our animation pages, there is a direct link to a video distribution service from which tapes, handled by the Public Affairs Office (PAO)/Goddard TV, including some of our animations may be ordered. General information on this service can be found here. |
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