Deforestation detections in Mato Grosso for 2002 (August 2001-2002), 2003 (August 2002-August 2003), and 2004 (August 2003-August 2004) are shown in yellow, blue, and red, respectively. Remaining forest cover in 2004 is shown in green. Background values for non-forested regions are Nomalized Difference Vegetation Index (NDVI) values from the MOD13 16-day composite from May 8-23, 2004 (julian days 129-144). Single-pixel deforestation clusters were removed based on lower reliability of single pixel clusters from field validation results.
Credit: Doug Morton, University of Maryland-College Park
The Amazon, a vast tropical forest stretching across South America, is so large that is virtually impossible to study the evolving landscapes within the basin without the use of satellites. Scientists have used satellite imagery of the Amazon for more than 30 years to seek answers about this diverse ecosystem and the patterns and processes of land cover change. This technology continues to advance and a new study shows that NASA satellite images can allow scientists to more quickly and accurately assess deforestation in the Amazon.
The above story is based on materials provided by NASA/Goddard Space Flight Center. Note: Materials may be edited for content and length.
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NASA/Goddard Space Flight Center. "NASA Satellite Data Provides Rapid Analysis Of Amazon Deforestation." ScienceDaily. ScienceDaily, 14 September 2005. <www.sciencedaily.com/releases/2005/09/050914105508.htm>.
NASA/Goddard Space Flight Center. (2005, September 14). NASA Satellite Data Provides Rapid Analysis Of Amazon Deforestation. ScienceDaily. Retrieved April 18, 2014 from www.sciencedaily.com/releases/2005/09/050914105508.htm
NASA/Goddard Space Flight Center. "NASA Satellite Data Provides Rapid Analysis Of Amazon Deforestation." ScienceDaily. www.sciencedaily.com/releases/2005/09/050914105508.htm (accessed April 18, 2014).