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CD34_AMAZON_LANDSAT LBA-ECO CD-34 Landsat Fractional Land Cover Analysis, Manaus, Brazil: 2004-2005 NEGRON-JUAREZ, R.I.; CHAMBERS, J.Q.; GUIMARAES, G.; ZENG, H.C.; RAUPP, C.F.M.; MARRA, D.M.; RIBEIRO, G.H.P.M.; SAATCHI, S.S.; NELSON, B.W.; HIGUCHI, N. LBA-ECO CD-34 Landsat Fractional Land Cover Analysis, Manaus, Brazil: 2004-2005 2013 Oak Ridge, Tennessee, U.S.A. Oak Ridge National Laboratory Distributed Active Archive Center Online Files doi:10.3334/ORNLDAAC/1176 1176

ABSTRACT: This data set provides the results of fractional land cover analysis for nonphotosynthetic vegetation (NPV) from two Landsat images of Manaus, Brazil, for October 14, 2004, and for July 29, 2005. Both images are from Landsat 5, path 231, row 62. The Manauas area experienced a squall line with intense downbursts from January 16-18, 2005, that resulted in widespread blowdown and tree mortality. The pre- and post-disturbance Landsat images were obtained and processed using spectral mixture analysis (SMA) in order to investigate forest disturbance and tree mortatility resulting from the downburst. SMA was based on scene-derived end-members of green vegetation (GV, photosynthetically active vegetation), NPV ( wood, dead vegetation, and surface litter), soil, and shade obtained using a pixel purity index (PPI) algorithm (Negron-Juarez et al., 2010). Changes in NPV due to disturbance were calculated by subtracting the 2004 NPV image from the 2005 NPV image. This NPV difference image is provided. There are three image files (.tif) with this data set: The two Landsat images that were georectified and converted to reflectance values and the NPV difference image. DATA QUALITY STATEMENT: The Data Center has determined that there are questions about the quality of the data reported in this data set. The data set has missing or incomplete data, metadata, or other documentation that diminishes the usability of the products. KNOWN PROBLEMS: Four additional images were needed to make this data set complete but are unavailable. Specifically, the two images resulting from SMA as applied to the Landsat images collected on the 14th of October, 2004 and the 29th of July, 2005 to determine per-pixel fractional abundance of GV, NPV (wood, dead vegetation, and surface litter), soil, and shade and the 2004 NPV and 2005 NPV images that were used to derive the €œNPV changes€ image (which we do provide) (Negron-Juarez, et al., 2010).

2004-10-14 2005-07-29 COMPLETE -2.63 -2.63 -60.17 -60.17 ESIP Earth Science Information Partners Program EOSDIS Earth Observing System Data Information System TECHNICAL CONTACT ORNL DAAC User Services ORNL DAAC USER SERVICES OFFICE OAK RIDGE NATIONAL LABORATORY OAK RIDGE, TENNESSEE 37831 USA DIF AUTHOR ORNL DAAC User Services ornldaac@ornl.gov (865) 241-3952 (865) 574-4665

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Oak Ridge Tennessee 37831-6407 USA 2013-08-01 ORNL_DAAC THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC) http://daac.ornl.gov/ 1176 DATA CENTER CONTACT ORNL DAAC USER SERVICES ornldaac@ornl.gov +1(865)241-3952 +1(865)574-4665

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Oak Ridge Tennessee 37831-6407 USA EARTH SCIENCE BIOSPHERE VEGETATION BIOMASS EARTH SCIENCE HUMAN DIMENSIONS HABITAT CONVERSION/FRAGMENTATION DEFORESTATION NPV MANAUS BLOWDOWN TREE MORTALITY SQUALL LINE EVENT FOREST DISTURBANCE SPECTRAL MIXTURE ANALYSIS NON-PHOTOSYNTHETIC VEGETATION MONTE CARLO (MC) SIMULATION MODEL GET DATA http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1176 VIEW RELATED INFORMATION https://daac.ornl.gov//LBA/guides/CD34_Amazon_Landsat.html LBA-ECO CD-34 Landsat Fractional Land Cover Analysis, Manaus, Brazil: 2004-2005 USA/NASA ENGLISH GCMD CEOS IDN DIF VERSION 9.0